All Wiring Diagrams for Chevrolet Cab & Chassis C1994 3500

ANTI-LOCK BRAKES

All-Wheel ABS Wiring Diagram, with DRL for Chevrolet Cab & Chassis C1994 3500

List of elements for All-Wheel ABS Wiring Diagram, with DRL for Chevrolet Cab & Chassis C1994 3500:

• (on master brake
• Abs ind
• Anti- lock ind
• Anti-lock module (4wal) (left front of cowl on brake master cylinder)
• Batt
• Brake fuse 15a
• Brake ind
• Brake pressure
• Brake sw
• Brake warn ind
• Bround
• C10
• Cruise control system
• Cylinder)
• Data link connector (under left side of i/p)
• Daytime running lights module (under left side of i/p)
• Diode (behind left side of i/p)
• Dlc
• Ecm-ign fuse 10a
• Fuse block
• G117 (right rear of engine)
• Gages fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in start or run
• Ign feed
• Ignition switch
• Instrument cluster
• Left fnt sens hi
• Left fnt sens lo
• Left front wheel sensor
• Park brake switch (on park brake assembly)
• Red
• Right front wheel sensor
• Rt fnt sens hi
• Rt fnt sens lo
• Tan
• Tcc brake switch (on brake pedal support arm)
• Vehicle speed sensor buffer (behind instrument panel on right side of steering column)
• Vss buffer input
• Warning lamp warning

All-Wheel ABS Wiring Diagram, without DRL for Chevrolet Cab & Chassis C1994 3500

List of elements for All-Wheel ABS Wiring Diagram, without DRL for Chevrolet Cab & Chassis C1994 3500:

• (on master brake
• Abs ind
• Anti- lock ind
• Anti-lock module (4wal) (left front of cowl on brake master cylinder)
• Batt
• Brake fuse 15a
• Brake ind
• Brake pressure
• Brake sw
• Brake warn ind
• Bround
• C10
• Cruise control system
• Cylinder)
• Data link connector (under left side of i/p)
• Diode (left side cowl)
• Dlc
• Ecm-ign fuse 10a
• Fuse block
• G117 (right rear of engine)
• Gages fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in start or run
• Ign feed
• Instrument cluster
• Left fnt sens hi
• Left fnt sens lo
• Left front wheel sensor
• Park brake switch (on park brake assembly)
• Red
• Right front wheel sensor
• Rt fnt sens hi
• Rt fnt sens lo
• Tan
• Tcc brake switch (on brake pedal support arm)
• Trunk, tailgate system (liftgate window release relay)
• Vehicle speed sensor buffer (behind instrument panel on right side of steering column)
• Vss buffer input
• Warning lamp warning

Rear ABS Wiring Diagram, with DRL for Chevrolet Cab & Chassis C1994 3500

List of elements for Rear ABS Wiring Diagram, with DRL for Chevrolet Cab & Chassis C1994 3500:

• 12v batt
• 12v ign
• Anti-lock brake valve (left side of engine compartment)
• Brake fuse 15a
• Brake ind
• Brake pressure warning switch (below master cylinder)
• Brake sw
• C10
• Data link connector (under left side of i/p)
• Daytime running lamps module (under left side of i/p)
• Diode
• Diode module (under left side of i/p)
• Dump sol
• E13
• Ecm-ign fuse 10a
• Fuse block
• G106 (rear of right cylinder head)
• Gages fuse 20a
• Gnd
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Hot in start or run
• Ignition switch
• Instrument cluster
• Instrument cluster (4wd ind)
• Iso sol
• Isolation sol
• Park brake warning switch (under left side of i/p)
• Powertrain control module (pcm) (under right end of instrument panel)
• Rear wheel anti-lock (rwal) module (left rear of engine (compartment)
• Reset
• Sol return
• Spd sig input
• Stop fuse 15a
• Tcc/stop lamp switch (top of brake pedal)
• Vehicle speed sensor buffer (behind i/p on right side of steering column)
• Vlv reset
• Warning lp

Rear ABS Wiring Diagram, without DRL for Chevrolet Cab & Chassis C1994 3500

List of elements for Rear ABS Wiring Diagram, without DRL for Chevrolet Cab & Chassis C1994 3500:

• (left side of engine compartment)
• 12v batt
• 12v ign
• Anti-lock brake valve
• Brake fuse 15a
• Brake ind
• Brake pressure warning switch (below master cylinder)
• Brake sw
• C10
• Data link connector (under left side of i/p)
• Diode (in diode module)
• Diode module (under left side of i/p)
• Dump sol
• E13
• Ecm-ign fuse 10a
• Fuse block
• G106 (rear of right cylinder head)
• Gages fuse 20a
• Gnd
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Hot in start or run
• Instrument cluster
• Instrument cluster system (4wd ind)
• Iso sol
• Isolation sol
• Park brake warning switch (mounted on park brake)
• Powertrain control module (pcm) (under right ind of instrument panel)
• Rear wheel anti-lock (rwal) module (left rear of engine (compartment)
• Reset
• Sol return
• Spd sig input
• Stop fuse 15a
• Tcc/stop lamp switch (top of brake pedal)
• Trunk, tailgate system (endgate window release relay)
• Vehicle speed sensor buffer (behind i/p on right side of steering column)
• Vlv reset
• Warning lp

COMPUTER DATA LINES

4.3L

4.3L (VIN Z), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A14 diagnostic test c218
• C159
• C272
• Data link connector
• F9 serial data c215
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.0L

5.0L (VIN H), Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A14 diagnostic test c218
• C159
• C272
• Data link connector
• F9 serial data c215
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.0L (VIN H), Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A8 serial data
• A9 diagnostic test c216
• C159
• C272
• Data link connector
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.7L

5.7L (VIN K) HD, Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K) HD, Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A14 diagnostic test c218
• C159
• C272
• Data link connector
• F9 serial data c215
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.7L (VIN K) HD, Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K) HD, Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A8 serial data
• A9 diagnostic test c216
• C159
• C272
• Data link connector
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.7L (VIN K), Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Data Link Connector Wiring Diagram, A/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A14 diagnostic test c218
• C159
• C272
• Data link connector
• F9 serial data c215
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

5.7L (VIN K), Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Data Link Connector Wiring Diagram, M/T for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A8 serial data
• A9 diagnostic test c216
• C159
• C272
• Data link connector
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

6.5L

6.5L (VIN F), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (top right rear of engine)
• (under right
• 4-wheel abs
• A12 diagnostic test c217a
• C14 serial data c216
• C159
• C272
• Data link connector
• End of i/p)
• Four-wheel anti-lock brake module (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G117
• Powertrain control module (under right end of i/p)
• Rear wheel abs
• Red
• Rwal module vehicle (left rear engine compt)
• Speed input
• Speed output
• Vehicle
• Vehicle speed sensor buffer

6.5L (VIN P), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (top right rear of engine)
• (under right
• 4-wheel abs
• A12 diagnostic test c217a
• C14 serial data c216
• C159
• C272
• Data link connector
• End of i/p)
• Four-wheel anti-lock brake module (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G117
• Powertrain control module (under right end of i/p)
• Rear wheel abs
• Red
• Rwal module vehicle (left rear engine compt)
• Speed input
• Speed output
• Vehicle
• Vehicle speed sensor buffer

6.5L (VIN S), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (top right rear of engine)
• (under right
• 4-wheel abs
• A12 diagnostic test c217a
• C14 serial data c216
• C159
• C272
• Data link connector
• End of i/p)
• Four-wheel anti-lock brake module (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G117
• Powertrain control module (under right end of i/p)
• Rear wheel abs
• Red
• Rwal module vehicle (left rear engine compt)
• Speed input
• Speed output
• Vehicle
• Vehicle speed sensor buffer

7.4L

7.4L (VIN N), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Data Link Connector Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p)
• (left front top of engine)
• A14 diagnostic test c218
• C159
• C272
• Data link connector
• F9 serial data c215
• Four-wheel anti-lock brake module diagnostic (near master cylinder)
• Fuel pump
• Fuel pump prime
• Fuel pump relay (right rear of engine compt, near battery junction)
• G110
• Powertrain control module (under right end of i/p)
• Red
• Request

CRUISE CONTROL

4.3L

4.3L (VIN Z), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (4.3l vin z & 5.7l & 5.7l hd v8 vin k)
• (at top of
• (at top of brake
• (at top of clutch
• (behind right side of instrument panel)
• (under left side
• (under left side of
• 12vdc ign
• B10
• Brake fuse 15a
• Brake pedal)
• C12
• C227a
• C229
• C286
• C289
• C290
• Clutch switch
• Compartment)
• Convenience center
• Cruise control brake switch
• Cruise control module (left rear side of engine
• Cruise control switch
• Cruise input
• Cruise on input
• Cruise release
• Ecm-ign fuse 10a
• Fuse block
• G110 (top left front of engine)
• G125 (top front center of engine)
• Gauges fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Instrument panel)
• N/0
• N/c
• Nca
• Of instrument
• Off
• Panel)
• Pcm signal
• Pedal)
• Power distri- bution
• Powertrain control module (pcm)
• R/a
• R/a signal
• S/c
• S/c signal
• Servo posit input
• Solid state
• Speed sensor input
• Stop fuse 15a
• Stop lp sw input
• System
• Tan
• Tcc/ stoplamp switch
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (behind upper right side of instrument panel)
• With manual transaxle
• Without manual transaxle

5.0L

5.0L (VIN H), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (4.3l vin z & 5.7l & 5.7l hd v8 vin k)
• (at top of
• (at top of brake
• (at top of clutch
• (behind right side of instrument panel)
• (under left side
• (under left side of
• 12vdc ign
• B10
• Brake fuse 15a
• Brake pedal)
• C12
• C227a
• C229
• C286
• C289
• C290
• Clutch switch
• Compartment)
• Convenience center
• Cruise control brake switch
• Cruise control module (left rear side of engine
• Cruise control switch
• Cruise input
• Cruise on input
• Cruise release
• Ecm-ign fuse 10a
• Fuse block
• G110 (top left front of engine)
• G125 (top front center of engine)
• Gauges fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Instrument panel)
• N/0
• N/c
• Nca
• Of instrument
• Off
• Panel)
• Pcm signal
• Pedal)
• Power distri- bution
• Powertrain control module (pcm)
• R/a
• R/a signal
• S/c
• S/c signal
• Servo posit input
• Solid state
• Speed sensor input
• Stop fuse 15a
• Stop lp sw input
• System
• Tan
• Tcc/ stoplamp switch
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (behind upper right side of instrument panel)
• With manual transaxle
• Without manual transaxle

5.7L

5.7L (VIN K), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (4.3l vin z & 5.7l & 5.7l hd v8 vin k)
• (at top of
• (at top of brake
• (at top of clutch
• (behind right side of instrument panel)
• (under left side
• (under left side of
• 12vdc ign
• B10
• Brake fuse 15a
• Brake pedal)
• C12
• C227a
• C229
• C286
• C289
• C290
• Clutch switch
• Compartment)
• Convenience center
• Cruise control brake switch
• Cruise control module (left rear side of engine
• Cruise control switch
• Cruise input
• Cruise on input
• Cruise release
• Ecm-ign fuse 10a
• Fuse block
• G110 (top left front of engine)
• G125 (top front center of engine)
• Gauges fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Instrument panel)
• N/0
• N/c
• Nca
• Of instrument
• Off
• Panel)
• Pcm signal
• Pedal)
• Power distri- bution
• Powertrain control module (pcm)
• R/a
• R/a signal
• S/c
• S/c signal
• Servo posit input
• Solid state
• Speed sensor input
• Stop fuse 15a
• Stop lp sw input
• System
• Tan
• Tcc/ stoplamp switch
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (behind upper right side of instrument panel)
• With manual transaxle
• Without manual transaxle

6.5L

6.5L (VIN F), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind right side of instrument panel)
• (on brake pedal support bracket)
• (rear of right cylinder head)
• 15a
• 3 mode cruise
• A/t
• Anti-lock brake system
• Brake fuse
• C13
• C215
• C216 c15
• C217a
• C226a
• C227a
• C271
• C289
• Clutch or (brake sw) input
• Clutch pedal position switch (on clutch pedal support bracket)
• Cruise cont sw-engage
• Cruise cont sw-retard
• Cruise control activator switch
• D11
• D15
• Ecm -ign fuse 10a
• Engage
• Fuse block
• G117
• Gauges fuse 20a
• Ground
• Hot in run
• Hot in run, bulb
• Hot in start or run
• Ignition
• M/t
• Off
• Pickup
• Powertrain control module (pcm) (behind right side of instrument panel)
• Retard
• Tcc/brake switch
• Test or start
• Vehicle speed input
• Vehicle speed sensor buffer
• Vss output
• Yukon& suburban

6.5L (VIN P), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind right side of instrument panel)
• (on brake pedal support bracket)
• (rear of right cylinder head)
• 15a
• 3 mode cruise
• A/t
• Anti-lock brake system
• Brake fuse
• C13
• C215
• C216 c15
• C217a
• C226a
• C227a
• C271
• C289
• Clutch or (brake sw) input
• Clutch pedal position switch (on clutch pedal support bracket)
• Cruise cont sw-engage
• Cruise cont sw-retard
• Cruise control activator switch
• D11
• D15
• Ecm -ign fuse 10a
• Engage
• Fuse block
• G117
• Gauges fuse 20a
• Ground
• Hot in run
• Hot in run, bulb
• Hot in start or run
• Ignition
• M/t
• Off
• Pickup
• Powertrain control module (pcm) (behind right side of instrument panel)
• Retard
• Tcc/brake switch
• Test or start
• Vehicle speed input
• Vehicle speed sensor buffer
• Vss output
• Yukon& suburban

6.5L (VIN S), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind right side of instrument panel)
• (on brake pedal support bracket)
• (rear of right cylinder head)
• 15a
• 3 mode cruise
• A/t
• Anti-lock brake system
• Brake fuse
• C13
• C215
• C216 c15
• C217a
• C226a
• C227a
• C271
• C289
• Clutch or (brake sw) input
• Clutch pedal position switch (on clutch pedal support bracket)
• Cruise cont sw-engage
• Cruise cont sw-retard
• Cruise control activator switch
• D11
• D15
• Ecm -ign fuse 10a
• Engage
• Fuse block
• G117
• Gauges fuse 20a
• Ground
• Hot in run
• Hot in run, bulb
• Hot in start or run
• Ignition
• M/t
• Off
• Pickup
• Powertrain control module (pcm) (behind right side of instrument panel)
• Retard
• Tcc/brake switch
• Test or start
• Vehicle speed input
• Vehicle speed sensor buffer
• Vss output
• Yukon& suburban

7.4L

7.4L (VIN N), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Cruise Control Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (4.3l vin z & 5.7l & 5.7l hd v8 vin k)
• (at top of
• (at top of brake
• (at top of clutch
• (behind right side of instrument panel)
• (under left side
• (under left side of
• 12vdc ign
• B10
• Brake fuse 15a
• Brake pedal)
• C12
• C227a
• C229
• C286
• C289
• C290
• Clutch switch
• Compartment)
• Convenience center
• Cruise control brake switch
• Cruise control module (left rear side of engine
• Cruise control switch
• Cruise input
• Cruise on input
• Cruise release
• Ecm-ign fuse 10a
• Fuse block
• G110 (top left front of engine)
• G125 (top front center of engine)
• Gauges fuse 20a
• Ground
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Instrument panel)
• N/0
• N/c
• Nca
• Of instrument
• Off
• Panel)
• Pcm signal
• Pedal)
• Power distri- bution
• Powertrain control module (pcm)
• R/a
• R/a signal
• S/c
• S/c signal
• Servo posit input
• Solid state
• Speed sensor input
• Stop fuse 15a
• Stop lp sw input
• System
• Tan
• Tcc/ stoplamp switch
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (behind upper right side of instrument panel)
• With manual transaxle
• Without manual transaxle

DEFOGGERS

Defogger Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Defogger Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (at dlc
• (at right b-pillar)
• (at right c-pillar)
• (ext and crew cab)
• (reg cab)
• Acc/bat circuit breaker 30a
• Connector)
• Convenience center (under left side of i/p)
• Fuse block
• G206
• G305
• G905
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test or start
• Hot with headlight switch in park or head
• Nca
• Off
• On indicator
• Panel lamps
• Pnl lps fuse 5a
• Rear defogger grid
• Rear defogger switch

ENGINE PERFORMANCE

4.3L

4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e)
• (4l80e)
• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air condition- ing system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr electronic vacuum regulator solenoid valve (4.3l w/nrq & a/t or 5.7l w/ 4l80e only) (right top of engine)
• Egr valve solenoid
• Egr valve solenoid (4l60e only) (left rear top of engine)
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (nb2, nrq & w/ 4l60e only) (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• G110 (left top front of engine)
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Only
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Pcm to trans temp sensor
• Pcm trans force mtr hi
• Pcm trans force mtr lo
• Pcm trans range a
• Pcm trans range b
• Pcm trans range c
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Tcc clutch ctrl
• Test, or start
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Trans input speed in hi
• Trans input speed in lo
• Trans shift 3/2 solenoid (4l60e only)
• Transmission input shaft speed sensor (4l80e only) (left side of trans- mission)
• Vss buffer signal
• Yukon & suburban

4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (4.3l only) (rear of engine)
• Knock sensor (right side of engine, below exhaust manifold)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Red
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)

4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e
• (4l60e) t
• (4l80e) s
• 3-2 shift solenoid (4l60e only)
• 4.3l all or w/ nrq
• 4wd fuse 25a
• All
• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Electronic 4-speed automatic overdrive transmission
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• Heated oxygen sensor (in exhaust y-pipe)
• Hot at all times
• Hot in run
• Hot in run or start
• Instrument
• Oil press in
• Only)
• Other
• Pnk
• Pressure control solenoid
• Range mode selector
• Red
• Shift sole- noid 1-2
• Shift solenoid 2-3
• Tach in
• Tan
• Torque converter clutch solenoid
• Trans fuse 10a
• Trans- mission temp sensor
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in
• W/ 4l60e
• W/ 4l80e

4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (7.4l only)
• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air conditioning system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr valve solenoid
• Egr valve solenoid (4.3l only) (left rear top of engine)
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Linear egr position in
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Test, or start
• Throttle actuator ctrl
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Upshift ind ctrl
• Vss buffer signal

4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (4.3l only) (rear of engine)
• Knock sensor (right side of engine, below exhaust manifold)
• Linear egr regulator solenoid valve (7.4l only) (right top of engine)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)
• Up- shift indic- ator

4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Engine Performance Wiring Diagrams, M/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (4.3l)
• (7.4l)
• 4wd fuse 25a
• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• Heated oxygen sensor (4.3l) (in exhaust y-pipe)
• Hot at all times
• Hot in run
• Instrument
• Oil press in
• Oxygen sensor (7.4l) (left exhaust manifold)
• Red
• Tach in
• Tan
• Throttle actuator solenoid (7.4l only) (on throttle body unit)
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in

5.0L

5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e)
• (4l80e)
• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air condition- ing system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr electronic vacuum regulator solenoid valve (4.3l w/nrq & a/t or 5.7l w/ 4l80e only) (right top of engine)
• Egr valve solenoid
• Egr valve solenoid (4l60e only) (left rear top of engine)
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (nb2, nrq & w/ 4l60e only) (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• G110 (left top front of engine)
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Only
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Pcm to trans temp sensor
• Pcm trans force mtr hi
• Pcm trans force mtr lo
• Pcm trans range a
• Pcm trans range b
• Pcm trans range c
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Tcc clutch ctrl
• Test, or start
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Trans input speed in hi
• Trans input speed in lo
• Trans shift 3/2 solenoid (4l60e only)
• Transmission input shaft speed sensor (4l80e only) (left side of trans- mission)
• Vss buffer signal
• Yukon & suburban

5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (4.3l only) (rear of engine)
• Knock sensor (right side of engine, below exhaust manifold)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Red
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)

5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e
• (4l60e) t
• (4l80e) s
• 3-2 shift solenoid (4l60e only)
• 4.3l all or w/ nrq
• 4wd fuse 25a
• All
• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Electronic 4-speed automatic overdrive transmission
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• Heated oxygen sensor (in exhaust y-pipe)
• Hot at all times
• Hot in run
• Hot in run or start
• Instrument
• Oil press in
• Only)
• Other
• Pnk
• Pressure control solenoid
• Range mode selector
• Red
• Shift sole- noid 1-2
• Shift solenoid 2-3
• Tach in
• Tan
• Torque converter clutch solenoid
• Trans fuse 10a
• Trans- mission temp sensor
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in
• W/ 4l60e
• W/ 4l80e

5.0L (VIN H), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• (5.7l hd only)
• (a/c compressor clutch)
• 12v battery
• 12v ignition
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• Air conditioning system
• Air switch solenoid
• Air switch solenoid (5.0l & 5.7l- pickup only) (right front of engine)
• Anti-lock brake system
• B10
• B11
• B12
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• C216
• Coolant temp sens sig
• Crank fuse 5a
• Crank signal
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• Distributor ref hi
• Distributor ref lo
• Dlc diagnostic test
• Dlc serial data
• Ecm-ign fuse 10a
• Egr solenoid
• Engine control module (under right side of i/p)
• Exhaust gas recirculation solenoid (5.0l & 5.7l ld only) (left rear top of engine)
• Fuel pump relay ctrl
• Fuel pump signal input
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Hot in start
• Iac coil a hi
• Iac coil a lo
• Iac coil b hi
• Iac coil b lo
• Ic bypass
• Idle air control unit (right rear of tbi unit)
• Ignition control (ic)
• Inj fuse 10a
• Injector 1 driver
• Injector 2 driver
• Instrument cluster
• Map 5v sensor ground
• Map sensor signal
• Mil indicator ctrl
• Oxygen sensor (left side exhaust manifold)
• Oxygen sensor ground
• Oxygen sensor signal
• Red
• Sensor return ground
• Service engine soon indicator
• Spark retard signal
• System ground
• Tan
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Tp sensor signal
• Up- shift lamp
• Upshift lamp ctrl
• Vss buffer signal

5.0L (VIN H), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• (center rear
• Accy
• Bulb test
• C12
• C14
• C15
• Distributor
• Egr elec- tronic vacuum regulator solenoid (5.7l hd only) (right top of engine)
• Engine coolant temperature sensor (right top front of engine)
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• G110 (left top front of engine)
• G125 (top front center of engine)
• Hot at all times
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (right side of engine, below exhaust manifold)
• Knock sensor module (above right side rocker cover)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Oil press in
• Pnk
• Red
• Run
• Start
• Tach in
• Tachometer test lead
• Tan
• Throttle position sensor (right side of throttle body)
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right side end of i/p)
• Vss in

5.7L

5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e)
• (4l80e)
• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air condition- ing system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr electronic vacuum regulator solenoid valve (4.3l w/nrq & a/t or 5.7l w/ 4l80e only) (right top of engine)
• Egr valve solenoid
• Egr valve solenoid (4l60e only) (left rear top of engine)
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (nb2, nrq & w/ 4l60e only) (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• G110 (left top front of engine)
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Only
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Pcm to trans temp sensor
• Pcm trans force mtr hi
• Pcm trans force mtr lo
• Pcm trans range a
• Pcm trans range b
• Pcm trans range c
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Tcc clutch ctrl
• Test, or start
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Trans input speed in hi
• Trans input speed in lo
• Trans shift 3/2 solenoid (4l60e only)
• Transmission input shaft speed sensor (4l80e only) (left side of trans- mission)
• Vss buffer signal
• Yukon & suburban

5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (4.3l only) (rear of engine)
• Knock sensor (right side of engine, below exhaust manifold)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Red
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)

5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4l60e
• (4l60e) t
• (4l80e) s
• 3-2 shift solenoid (4l60e only)
• 4.3l all or w/ nrq
• 4wd fuse 25a
• All
• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Electronic 4-speed automatic overdrive transmission
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• Heated oxygen sensor (in exhaust y-pipe)
• Hot at all times
• Hot in run
• Hot in run or start
• Instrument
• Oil press in
• Only)
• Other
• Pnk
• Pressure control solenoid
• Range mode selector
• Red
• Shift sole- noid 1-2
• Shift solenoid 2-3
• Tach in
• Tan
• Torque converter clutch solenoid
• Trans fuse 10a
• Trans- mission temp sensor
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in
• W/ 4l60e
• W/ 4l80e

5.7L (VIN K), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• (5.7l hd only)
• (a/c compressor clutch)
• 12v battery
• 12v ignition
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• Air conditioning system
• Air switch solenoid
• Air switch solenoid (5.0l & 5.7l- pickup only) (right front of engine)
• Anti-lock brake system
• B10
• B11
• B12
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• C216
• Coolant temp sens sig
• Crank fuse 5a
• Crank signal
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• Distributor ref hi
• Distributor ref lo
• Dlc diagnostic test
• Dlc serial data
• Ecm-ign fuse 10a
• Egr solenoid
• Engine control module (under right side of i/p)
• Exhaust gas recirculation solenoid (5.0l & 5.7l ld only) (left rear top of engine)
• Fuel pump relay ctrl
• Fuel pump signal input
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Hot in start
• Iac coil a hi
• Iac coil a lo
• Iac coil b hi
• Iac coil b lo
• Ic bypass
• Idle air control unit (right rear of tbi unit)
• Ignition control (ic)
• Inj fuse 10a
• Injector 1 driver
• Injector 2 driver
• Instrument cluster
• Map 5v sensor ground
• Map sensor signal
• Mil indicator ctrl
• Oxygen sensor (left side exhaust manifold)
• Oxygen sensor ground
• Oxygen sensor signal
• Red
• Sensor return ground
• Service engine soon indicator
• Spark retard signal
• System ground
• Tan
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Tp sensor signal
• Up- shift lamp
• Upshift lamp ctrl
• Vss buffer signal

5.7L (VIN K), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• (center rear
• Accy
• Bulb test
• C12
• C14
• C15
• Distributor
• Egr elec- tronic vacuum regulator solenoid (5.7l hd only) (right top of engine)
• Engine coolant temperature sensor (right top front of engine)
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• G110 (left top front of engine)
• G125 (top front center of engine)
• Hot at all times
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (right side of engine, below exhaust manifold)
• Knock sensor module (above right side rocker cover)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Oil press in
• Pnk
• Red
• Run
• Start
• Tach in
• Tachometer test lead
• Tan
• Throttle position sensor (right side of throttle body)
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right side end of i/p)
• Vss in

6.5L

6.5L (VIN F), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN F), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 2-3 shift sol ctrl
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN F), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl (pwm)
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN F), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN P), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN P), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 2-3 shift sol ctrl
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN P), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl (pwm)
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN P), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN P), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 4 wheel drive low switch
• 4wd fuse 25a
• 4wd low sw
• 5v ref
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure gnd
• Clutch pedal position switch
• Conven- ience center
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Or run
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Trans fluid temp sig
• Trans output
• Trans output spd sig
• Vehicle speed sensor buffer (under right end of i/p)
• Vss
• Vss input
• Vss output

6.5L (VIN P), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service throttle" lamp
• 'service engine soon' lamp
• 'service throttle' lamp
• 'wait' lamp
• (upper rear of engine)
• 20a
• A/c sig
• A10
• A11
• A12
• Air cond- itioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f only) (upper left
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p only) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s) (left rear top of engine)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right side of safety wall)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117 (rear of right cylinder head)
• G117 (top right rear of engine)
• G206 (under left side of i/p, near dlc)
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (vin f & s) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Side of cowl)
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Wastegate sol ctrl
• Wastegate solenoid (vin f only) (left rear top of engine)

6.5L (VIN S), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, 4L60E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN S), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, 4L60E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 2-3 shift sol ctrl
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN S), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, 4L80E A/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low switch
• 4wd fuse 25a
• 5v ref
• A range mode selector
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• B/h
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure sig
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Electronic 4-speed automatic overdrive transmission
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• Fwd low sw
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start or run
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Press ctrl sol
• Press ctrl sol (lo)
• Pressure control sol
• Range signal a
• Range signal b
• Range signal c
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Tcc sol
• Tcc sol ctrl (pwm)
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd (hi)
• Trans input spd sig
• Trans output
• Trans output spd sig
• Transmission input speed sensor
• Turbo only
• Vehicle speed sensor buffer (under right end of i/p)
• Vin p only
• Vss
• Vss input
• Vss output

6.5L (VIN S), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, 4L80E A/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service engine soon" lamp
• "service throttle" lamp
• (left rear top of engine)
• (rear of right cylinder head)
• (turbo only)
• (under left side of i/p, near dlc)
• (upper rear of engine)
• 20a
• A/c sig
• A10
• A11
• A12
• Air conditioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f) (upper left side of cowl)
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right upper cowl)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117
• G117 (top right rear of engine)
• G206
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (turbo only) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Vin p only
• Wait lamp
• Wastegate sol ctrl
• Wastegate solenoid (turbo only) (left rear top of engine)

6.5L (VIN S), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, M/T (1 of 2) for Chevrolet Cab & Chassis C1994 3500:

• 4 wheel drive low switch
• 4wd fuse 25a
• 4wd low sw
• 5v ref
• Accelerator pedal position (app) module (top of accelerator bracket)
• Anti-lock brakes system
• App 1 sens 5v ref
• App 1 sens gnd
• App 1 sensor
• App 2 sens gnd
• App 2 sensor
• App 3 sens 5v ref
• App 3 sens gnd
• App 3 sensor
• App sens 1 sig
• App sens 2 sig
• Battery feed
• Boost sig
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Ckp sig
• Closure gnd
• Clutch pedal position switch
• Conven- ience center
• Crk fuse 5a
• Cruise control system
• Cruise on/off sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (under left side of i/p)
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ect sig
• Egr ctrl/baro sig
• Egr sol ctrl
• Eng shut-off ctrl
• Engine coolant temperature (ect) sensor (right side of engine)
• Engine shut- off solenoid (top front of engine)
• F/sol fuse 20a
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel inj ctrl
• Fuel inj sig
• Fuel solenoid (top front of engine)
• Fuel solenoid driver (top front of engine)
• Fuse block
• G117 (top right rear of engine)
• Glow plug rly ctrl
• Hi resolution sig
• Hot at all times
• Hot in crank
• Hot in run
• Hot in start
• Mil
• Optical sens 5v ref
• Optical sens cam sig
• Optical sens gnd
• Optical sensor and fuel temper- ature sensor (top front of engine)
• Or run
• Pnk
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Resume/accel sig
• Sensor gnd
• Serial data
• Set/coast sig
• Speed sensor (left rear side of transmission)
• System gnd
• Tan
• Tcc brake sw
• Trans fluid temp sig
• Trans output
• Trans output spd sig
• Vehicle speed sensor buffer (under right end of i/p)
• Vss
• Vss input
• Vss output

6.5L (VIN S), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams, M/T (2 of 2) for Chevrolet Cab & Chassis C1994 3500:

• "service throttle" lamp
• 'service engine soon' lamp
• 'service throttle' lamp
• 'wait' lamp
• (upper rear of engine)
• 20a
• A/c sig
• A10
• A11
• A12
• Air cond- itioning system
• App 2 sens 5v ref
• App 3 sens sig
• B/h
• B10
• B11
• B12
• Baro sensor (vin f only) (upper left
• C red
• C203
• Crankshaft position sensor (top front of engine, inside
• Cruise ctrl brake sig
• Diagnostic request
• Ecm-ign fuse 10a
• Egr control pressure/ baro sensor (vin p & s) (upper left side of cowl)
• Egr solenoid (vin p only) (left rear top of engine)
• Egr vent sol ctrl
• Egr vent solenoid (vin p & s) (left rear top of engine)
• Fuel heater (top rear of engine)
• Fuel pump in-line fuse
• Fuel pump oil pressure switch
• Fuel pump relay (right side of safety wall)
• Fuel pump/sender (in fuel tank)
• Fuel temp sig
• Fuse block
• Fusible link (12ga-
• Fusible links
• G117 (rear of right cylinder head)
• G117 (top right rear of engine)
• G206 (under left side of i/p, near dlc)
• Gauges fuse 20a
• Glo plug fuse 5a
• Glow plug control relay (right rear top of engine)
• Glow plug sig
• Hot at all times
• Hot in run, bulb test or start
• Hot in start or run
• Iat sig
• Ignition feed
• Injection pump)
• Injection timing stepper (its) motor (top front of engine)
• Instrument cluster
• Instrument clusters system
• Intake air temperature (iat) sensor (at front of engine)
• Its coil 1 hi
• Its coil 1 lo
• Its coil 2 hi
• Its coil 2 lo
• Left bank glow plugs
• Manifold absolute pressure sensor (vin f & s) (left rear engine compt, at cowl)
• Powertrain control module (pcm) (under right end of i/p)
• Red
• Right bank glow plugs
• Side of cowl)
• Sol fuse 5a
• Stop fuse 15a
• Tan
• Tcc/ brake switch (on brake pedal support bracket)
• Wastegate sol ctrl
• Wastegate solenoid (vin f only) (left rear top of engine)

7.4L

7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air condition- ing system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr valve solenoid
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• G110 (left top front of engine)
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Linear egr position in
• Linear egr regulator solenoid valve (right top of engine)
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Pcm to trans temp sensor
• Pcm trans force mtr hi
• Pcm trans force mtr lo
• Pcm trans range a
• Pcm trans range b
• Pcm trans range c
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Tcc clutch ctrl
• Test, or start
• Throttle actuator sol ctrl
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Trans input speed in hi
• Trans input speed in lo
• Transmission input shaft speed sensor (left side of trans- mission)
• Vss buffer signal

7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (right side of engine, below exhaust manifold)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Red
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)

7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, A/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• Heavy duty electronic 4-speed automatic overdrive transmission
• Hot at all times
• Hot in run or start
• Instrument
• Oil press in
• Oxygen sensor (left exhaust manifold)
• Pnk
• Pressure control solenoid
• Range mode selector
• Red
• Shift solenoid 1-2
• Shift solenoid 2-3
• Tach in
• Tan
• Throttle actuator solenoid (on throttle body unit)
• Torque converter clutch solenoid
• Trans fuse 10a
• Trans- mission temp sensor
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in

7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (7.4l only)
• (left top front
• 12v battery
• 12v ignition
• 5v return a
• 5v return b
• 5v sensor ref
• A/c on signal in
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• Air conditioning system
• B10
• B11
• B12
• B13
• B14
• B15
• B16
• Brake sw to pcm
• C215
• C218
• Coolant temp sensor
• Cruise control system
• Cruise ind reg grd
• Distributor ref hi
• Distributor ref lo
• Dlc
• Dlc serial data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Ecm-ign fuse 10a
• Egr valve solenoid
• Egr valve solenoid (4.3l only) (left rear top of engine)
• Elec fuel pump in
• Engine control module (under right side of i/p)
• Evap canister purge ctrl
• Evaporative canister purge solenoid (on engine)
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Fuel pump relay ctrl
• Fuse block
• G110
• Hot in run
• Hot in run, bulb
• Idle air control unit (right rear of tbi unit)
• Ignition bypass
• Ignition control (ic)
• Inj fuse 10a
• Knock sensor in
• Linear egr position in
• Lo side inj a
• Lo side inj b
• Map sensor in
• Mil indicator ctrl
• Of engine)
• Or start
• Oxygen sensor hi
• Oxygen sensor lo
• Red
• Stepper coil a hi
• Stepper coil a lo
• Stepper coil b hi
• Stepper coil b lo
• System ground
• Tan
• Test, or start
• Throttle actuator ctrl
• Throttle body fuel injector #1 (top of throttle body unit)
• Throttle body fuel injector #2 (top of throttle body unit)
• Throttle position sensor in
• Upshift ind ctrl
• Vss buffer signal

7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (center rear
• Accy
• Bulb test
• Distributor
• Engine coolant temperature sensor (right top front of engine)
• Fuse block
• Gauges fuse 20a
• Hot at all times
• Hot in run, bulb test, or start
• Ignition coil (center rear of engine)
• Ignition switch
• Instrument cluster
• Knock sensor (4.3l only) (rear of engine)
• Knock sensor (right side of engine, below exhaust manifold)
• Linear egr regulator solenoid valve (7.4l only) (right top of engine)
• Lock
• Manifold absolute pressure sensor (right rear top of engine)
• Nca
• Of engine)
• Off
• Pnk
• Run
• Service engine soon indicator
• Start
• Tachometer test lead
• Tcc/brake switch (top of brake pedal bracket)
• Throttle position sensor (right side of throttle body)
• Up- shift indic- ator

7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Engine Performance Wiring Diagrams, M/T (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l only)
• (4.3l)
• (7.4l)
• 4wd fuse 25a
• C12
• C13
• C14
• C15
• Cluster
• Data link connector (under left side of i/p)
• Fuel pump and sender
• Fuel pump in-line fuse 20a
• Fuel pump oil pressure switch (left rear of engine, near exhaust manifold)
• Fuel pump relay (right rear of engine compartment, near battery junction block)
• Fuse block
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• Heated oxygen sensor (4.3l) (in exhaust y-pipe)
• Hot at all times
• Hot in run
• Instrument
• Oil press in
• Oxygen sensor (7.4l) (left exhaust manifold)
• Red
• Tach in
• Tan
• Throttle actuator solenoid (7.4l only) (on throttle body unit)
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vss in

EXTERIOR LIGHTS

Exterior Lamps Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Exterior Lamps Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (chassis cab)
• (in license lamp harness, behind left side of rear bumper) s403
• (left side of engine compartment near headlamp) s105
• (left side)
• (near center high mount stoplamp relay, at left side of eng compartment)
• (pickup)
• (right side)
• (taped to body near fuse block)
• 30a
• Auxiliary lead
• Backup a lamps
• Backup lamps switch (on top of steering column, a/t) (left top of transmission, m/t)
• Battery junction block (in engine compartment, right upper cowl)
• C203
• C271
• Center high mount stoplamp
• Center high mount stoplamp relay
• Chassis cab
• Convenience center (under left side of i/p)
• Crossmember) s426
• Cruise control system
• Fuse block: i/p
• G101 (right inner fender, near battery)
• G106 (on sheet metal, above left headlamp)
• G110 (left top of engine)
• G117 (rear of right) cylinder head)
• G206 (under i/p)
• G409 (left rear frame rail)
• G409 (left side of platform hitch) (rear of left frame rail)
• Hazard
• Hazard flasher (under left side of i/p)
• Head
• Headlight switch assembly
• Heavy duty
• Hot at all times
• Hot in run, bulb test or start
• Inline fuse (near battery junction block)
• Instrument cluster
• Left backup lamp
• Left front marker lamp
• Left front park/turn lamps
• Left tail/stop/ turn lamp
• Left turn indicator
• License lamps
• Normal
• Off
• Park
• Park lps fuse 20a
• Pickup
• Pickup only
• Rear clearance lamps circuit (pickup w/ dual rear wheels)
• Red
• Right backup lamp
• Right front marker lamp
• Right front park/turn lamps
• Right tail/stop/ turn lamp
• Right turn indicator
• Roof marker lamps
• S103
• S104
• S118
• S190
• S207
• S208
• S210 (under left side of dash)
• S251
• S275a (near center high mount stoplamp relay, at left side of eng compartment)
• S404
• S406 (in trailer harness, at rear crossmember)
• S407 (in trailer harness, at rear crossmember)
• S420 (in trailer harness, at rear crossmember)
• S425
• S425 (in rear lamp harness, at left side of rear crossmember)
• S427 (in rear lamp harness, at left side of rear crossmember)
• Stop fuse 15a
• Stoplamp switch (top of brake pedal)
• Terminates for auxiliary usage
• Trailer tow
• Turn left
• Turn right
• Turn signal flasher
• Turn-b/u fuse 15a
• Turn/hazard switch (upper left side of steering switch)
• W/ chassis cab only

Rear Clearance Lamps Wiring Diagram, with Dual Rear Wheels for Chevrolet Cab & Chassis C1994 3500

List of elements for Rear Clearance Lamps Wiring Diagram, with Dual Rear Wheels for Chevrolet Cab & Chassis C1994 3500:

• (in rear lamp harness, at left side of rear crossmember) s427
• (in trailer wiring harness, at rear crossmember) s405
• Endgate marker lamps
• Front marker & park/turn lamps
• Fuse block: i/p
• G409 (bottom center of endgate)
• G409 (left side of hitch, w/ platform hitch) (left frame rail, w/o platform hitch)
• Head
• Headlight switch assembly
• Hot at all times
• Left front clearance lamp
• Left rear clearance lamp
• Left rear fender
• Off
• Park
• Park lps fuse 20a
• Right front clearance lamp
• Right rear clearance lamp
• Right rear fender
• S208
• S210 (behind left end of dash)
• S425
• Tail/stop/turn & license lamps)
• Trailer tow

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (4.3l, 5.0l, 5.7l engines)
• (7.4l engine)
• (diesel engines)
• A/c high pressure switch
• Auxiliary cooling fan motor
• Auxilliary battery (gas engines)
• Battery (right)
• Body ground
• Crew cab, suburban & utility vehicles w/ auxilliary lighting
• Crew cab, suburban & utility vehicles w/ overhead console
• Daytime running lamps
• Engine ground
• Front dome & reading lamps
• Front left park and turn lamp
• Front right park and turn lamp
• G# n/a (near rear dome lamps)
• G# n/a (near front dome lamps)
• G# n/a (no location available)
• G101 (right inner fender, near battery)
• G101 (right inner fender, near battery)
• G106 (gasoline engines) (on sheet metal above left headlamp)
• G106 (on sheet metal, above left headlamp)
• G110 (diesel engines) (left top front of engine)
• G119 (front of right cylinder head)
• G119 (right front of engine)
• G119 (right front top of engine)
• G305 (pickup) (right "b" pillar)
• G905 (extended & crew cab) (at right "c" pillar)
• G909 (near front dome lamp)
• Headlights system
• Left battery (diesel engines)
• Left fog lamp
• Left high beam headlamp
• Left high/ low beam headlamp
• Left horn
• Left low beam headlamp
• Left snow- plow lamp, turn signal relay
• Nca
• Overhead roof console lamps
• Rear defogger grid (pickup)
• Rear dome & reading lamps
• Relay
• Right fog lamp
• Right high beam headlamp
• Right high/ low beam headlamp
• Right horn
• Right low beam headlamp
• Right park and turn lamp
• Right snow- plow lamp, turn signal relay
• To g206
• Uncoated
• W/ daytime running lights
• W/ l19 gasoline engine and a/c
• W/ snowplow preparation package
• W/ v22 appearance package
• W/o daytime running lights
• W/o v22 appearance package
• Washer pump motor
• With v22 appearance package

Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (l05 only) w/ hd automatic transmission
• 4wal module
• 4wal pump motor
• A/c comp- ressor clutch
• A/c controller
• A/c high pressure cutout switch # 2
• A12
• All
• Ash tray lamps
• Audio alarm module
• Auxiliary battery relay
• Blower motor
• C103a
• C159
• C208
• C212
• C228a
• C230a
• C244
• C257
• C287a
• C290
• C86
• Center
• Center high mount stoplamp (chmsl)
• Center high mount stoplamp relay
• Cigarette lighter assembly
• Convenience
• Convenience center
• Coolant level sensor
• Cruise control module
• Data link connector
• Daytime running lamps module
• Daytime running lamps relay
• Diode
• Egr electronic vacuum regulator solenoid valve
• Engine only
• Except drl
• Four- wheel drive indicator
• From left high (or high/low) beam headlamp
• Fuel heater
• Fuel pump and sender
• Fuel pump relay
• G110 (lb4, l19 engines) (left top front of engine)
• G110 (left top front of engine)
• G117 (rear of right cylinder head)
• G125 (l03, l05 engines) top front center of engine)
• G206 (at data link connector)
• Glow plug control module
• Gra
• Ground bus
• Heated oxygen sensor
• I/p comp- artment box lamp
• Instrument cluster
• Lb4, l03, l05, l19 gasoline engines w/ automatic transmission lb4, l19 gasoline engines w/ manual transmission
• Left door jamb switch
• Low coolant warning lamp module
• Nca
• Panel dimmer switch (assembly)
• Park/ neutral position switch
• Pickup only
• Power locks power windows
• Power seat
• Powertrain control module (pcm)
• Radio
• Rear auxilliary heater control
• Rear defogger switch
• Rear washer pump motor
• Rear wiper/ washer switch
• Right door jamb switch
• Roof marker lamps
• Rwal module
• Safety belt retractor switch
• Suburban & utility only
• Tan
• Turn flasher
• Vehicle speed sensor buffer
• W/ diesel engines only
• W/ lb4, l03 & l05 engines
• Water- in- fuel sensor
• Wiper motor and module (front)

Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Cab & Chassis C1994 3500

List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Cab & Chassis C1994 3500:

• (at left rear of frame rail)
• (at left side of hitch)
• (at rear of left frame rail)
• (bottom center of endgate)
• (l05 engine w/hd automatic transmission)
• (top front center of engine)
• (vin k) (w/ manual transmission)
• (w/ platform hitch)
• (w/o platform hitch)
• (w/o platform hitch) (at left rear of frame rail)
• A12
• Auxilliary air condi- tioning (or heater and air conditioning) control (front)
• Auxilliary air condi- tioning (or heater and air conditioning) control (rear)
• Auxilliary heater and air conditioning logic module
• Blower motor (rear)
• Center high mount stoplamp
• Chassis cab
• Convenience center
• Data link connector
• Endgate
• Endgate clearance lamps
• Evrv electronic vacuum regulator valve solenoid
• Fuel pump
• Fuel pump relay
• G110 (left top front of engine)
• G117 (top right rear of engine)
• G125
• G409
• G409 (at left rear of frame rail)
• G409 (at left side of hitch)
• G409 (w/ platform hitch)
• G409 (w/o platform hitch)
• G998 (at right "d" pillar)
• Heavy duty trailer wiring u89
• Hot fuel handling module
• Knock sensor module
• L03, l05 gasoline engines w/ manual transmission
• L49, l56 & l65 diesel engines w/ manual transmission
• Left cargo door defogger grid
• Left door contact switch
• Left front clearance lamp
• Left license lamp
• Left rear clearance lamp
• Left rear fender
• Left rear tail, stop, license, turn and backup lamps
• Left rear tail, stop, turn and backup lamps
• Left tail/ stop, turn and backup lamp
• Liftgate window release solenoid
• Mode door motor
• Orn
• Park/ neutral position switch
• Pickup (w/o dual rear wheels), suburban and utility
• Pickup with dual rear wheels
• Powertrain control module (pcm)
• Rear door jamb switch
• Rear endgate window defogger grid
• Rear wiper motor module
• Right cargo door defogger grid
• Right door contact switch
• Right front clearance lamp
• Right gas strut cylinder
• Right license lamp
• Right rear clearance lamp
• Right rear fender
• Right rear tail, stop, license, turn and backup lamps
• Right rear tail, stop, turn and backup lamps
• Right tail/ stop, turn and backup lamp
• Suburban & utility
• Suburban & utility non-base vehicle
• Suburban & utility w/ automatic transmissions
• Tan
• Temper- ature door motor
• Temper- ature mode door relay
• Trailer
• Vehicle speed sensor buffer
• W/ auxilliary heater & air conditioning
• W/ rear auxilliary heater only
• With endgate

HEADLIGHTS

Headlamps Wiring Diagram, DRL with Composite Lamps for Chevrolet Cab & Chassis C1994 3500

List of elements for Headlamps Wiring Diagram, DRL with Composite Lamps for Chevrolet Cab & Chassis C1994 3500:

• (at park brake, under left side of i/p)
• Bulb check
• Daytime running lamp indicator
• Daytime running lamps module (behind left side of i/p)
• Daytime running lamps relay (engine compartment front plenum panel)
• Drl fuse 15a
• Fuse block
• G101 (right inner fender, near battery)
• G106 (on sheet metal, above left headlamp)
• G206 (at dlc connector)
• Gauges fuse 20a
• Ground
• Head
• Headlamp dimmer switch
• Headlight switch assembly
• Hi beam feed
• Hi beam indicator
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Htr-a/c fuse 25a
• Ignition
• Instrument cluster
• Lamp feed
• Left high beam headlamp
• Left low beam headlamp
• Off
• Output to relay
• Park
• Park brake warning switch
• Pickup only
• Right high beam headlamp
• Right low beam headlamp
• Suburban/ utility only
• Tan

Headlamps Wiring Diagram, DRL with Sealed Beam Lamps for Chevrolet Cab & Chassis C1994 3500

List of elements for Headlamps Wiring Diagram, DRL with Sealed Beam Lamps for Chevrolet Cab & Chassis C1994 3500:

• (at park brake, under left side of i/p)
• Bulb check
• Daytime running lamp indicator
• Daytime running lamps module (behind left side of i/p)
• Daytime running lamps relay (engine compartment front plenum panel)
• Drl fuse 15a
• Fuse block
• G106 (on sheet metal above left headlamp)
• G107 (on radiator support, behind right headlamp)
• G206 (at dlc connector)
• Gauges fuse 20a
• Ground
• Head
• Headlamp dimmer switch
• Headlight switch assembly
• Hi beam feed
• Hi beam indicator
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Htr-a/c fuse 25a
• Ignition
• Instrument cluster
• Lamp feed
• Left headlamp assembly
• Off
• Output to relay
• Park
• Park brake warning switch
• Pickup only
• Right headlamp assembly
• Suburban/ utility only
• Tan

Headlamps Wiring Diagram, with Sealed Beam Lamps for Chevrolet Cab & Chassis C1994 3500

List of elements for Headlamps Wiring Diagram, with Sealed Beam Lamps for Chevrolet Cab & Chassis C1994 3500:

• G117 (right inner fender near battery)
• G206 (at dcl connector)
• Head
• Headlamp dimmer switch
• Headlight switch assembly
• Hi beam indicator
• Hot at all times
• Instrument cluster
• Left headlamp assembly
• Off
• Park
• Right headlamp assembly
• Tan

Headlamps/Fog Lamps Wiring Diagram, with Composite Lamps for Chevrolet Cab & Chassis C1994 3500

List of elements for Headlamps/Fog Lamps Wiring Diagram, with Composite Lamps for Chevrolet Cab & Chassis C1994 3500:

• (on sheet metal
• (right inner
• Above left headlamp)
• Acc-batt circuit breaker 30a
• Battery)
• Convenience center (under left side of i/p)
• Fender, near
• Fog lamp on indicator
• Fog lamp relay (behind left side of i/p)
• Fog lamp switch
• Fuse block
• G101
• G101 (right inner fender, near battery)
• G106
• G106 (on sheet metal above left headlamp)
• G206 (at dcl connector)
• Head
• Headlamp dimmer switch
• Headlight switch assembly
• Hi beam indicator
• Hot at all times
• Illum lamp
• Instrument cluster
• Left fog lamp
• Left high beam head- lamp
• Left low beam head- lamp
• Off
• Park
• Pnl lps fuse 5a
• Right fog lamp
• Right high beam head- lamp
• Right low beam head- lamp
• Solid state switch
• Tan
• Variable voltage w/ headlight switch in park or head & rheostat adjusted

HORN

Horn Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Horn Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (on sheet metal,
• (right inner
• Convenience center (under left side of i/p)
• Fuse block
• G100 above left headlamp)
• G101 fender, near battery)
• Horn relay
• Horn switch
• Hot at all times
• Left horn (at front of vehicle)
• Park lps fuse 20a
• Right horn (at front of vehicle)
• Steering wheel
• W/v22 only

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram, Diesel for Chevrolet Cab & Chassis C1994 3500

List of elements for Instrument Cluster Wiring Diagram, Diesel for Chevrolet Cab & Chassis C1994 3500:

• (behind left
• (behind left side of i/p)
• (front axle
• (front of engine)
• (inside fuel tank)
• (left rear side
• (left top front of engine)
• (right rear
• (turn-hazard
• (under center of i/p)
• (under left side of i/p)
• (under left side of i/p,
• (under left side of i/p, taped to i/p harness)
• (under right side of i/p)
• (w/o drl-dimmer switch; w/ drl-daytime running
• 4-wheel
• 4-wheel abs
• 4-wheel anti-lock brake module (near master cylinder)
• 4wd ind.
• Abs only
• Anti-lock
• Anti-lock brakes ind.
• Audio alarm
• Brake ind.
• Brake module (near master
• Brake pressure warning switch (below master cylinder, at combination valve)
• Center)
• Charge ind.
• Check gauges ind.
• Check gauges lamp driver
• Control module
• Convenience
• Coolant temp.
• Coolant temp. gauge
• Cylinder)
• Daytime
• Daytime running
• Daytime running lamps relay
• Diode
• Diode (behind left side of i/p)
• Drl ind.
• Engine coolant level indicator module
• Engine coolant level sensor (right rear side of radiator)
• Engine coolant temperature sender
• Engine speed
• Engine)
• Exhaust manifold)
• Exterior lights
• Fuel gauge
• Fuel level
• Fuel pump & sender
• Fuel sensor
• Fuse block: i/p
• G110
• G125
• G202
• Gauges fuse 20a
• Generator (left top front of
• Glow plug controller
• Glow plug fuse 5a
• Gnd
• Harness)
• Headlights system
• High beam ind.
• Hot in run, bulb test or start
• Ign
• Ignition switch
• Illum.
• Illum. lamps
• Instrument cluster
• J i
• Lamps module
• Lamps module)
• Left turn ind.
• Low coolant ind.
• Malfunction ind.
• Module
• Of transmission)
• Oil press.
• Oil press. gauge
• Oil pressure switch & sender (left rear of engine, under
• Only
• Over 15,000
• Panel lps fuse 5a
• Park brake warning switch (under left side of i/p)
• Pounds gvw
• Powertrain
• Rear anti-lock brake module (left rear of engine compt)
• Rear wheel abs
• Release relay)
• Right turn ind.
• Running lamps module
• Safety belt ind.
• Service fuel filter ind.
• Service throttle ind.
• Side of i/p, in
• Solenoid switch)
• Solid state
• Speed sensor
• Speedo- meter
• Switch)
• System
• Tacho- meter
• Tailgate release system (endgate window
• Tan
• Taped to i/p
• Top of engine)
• Transmissions
• Twisted pair
• Variable voltage w/ head/park lamps on & dimmer sw adjusted
• Vehicle speed
• Vehicle speed sensor buffer (behind right side of i/p)
• Volt- meter
• W/ 4-wheel
• W/ drl
• W/ drl only
• W/o drl
• Wait-to start ind.
• Water-in

Instrument Cluster Wiring Diagram, Gasoline for Chevrolet Cab & Chassis C1994 3500

List of elements for Instrument Cluster Wiring Diagram, Gasoline for Chevrolet Cab & Chassis C1994 3500:

• 5.7l(a/t) & 7.4l
• a5-5.0l(m/t) & 5.7l(m/t)
• (behind left
• (behind left side of i/p)
• (center rear
• (front axle
• (inside fuel tank)
• (left rear side
• (left top front of engine)
• (turn-hazard
• (under left side of i/p)
• (under left side of i/p,
• (under left side of i/p, taped to i/p harness)
• (under right side of i/p)
• (w/o drl-dimmer switch; w/ drl-daytime running
• **e2-4.3l & 7.4l a7-5.0l & 5.7l
• *e6-4.3l, 5.0l(a/t),
• 4- wheel abs
• 4-wheel
• 4-wheel anti-lock brake module (near master cylinder)
• 4wd ind.
• Abs only
• Anti-lock
• Anti-lock brakes ind.
• Audio alarm
• Brake ind.
• Brake module (near master
• Brake pressure warning switch (below master cylinder, at combination valve)
• Center)
• Charge ind.
• Check gauges ind.
• Check gauges lamp driver
• Control module
• Convenience
• Coolant temp.
• Coolant temp. gauge
• Cylinder)
• Daytime
• Daytime running
• Daytime running lamps relay
• Diode
• Diode (behind left side of i/p)
• Drl ind.
• Engine coolant temperature sender
• Engine speed
• Engine)
• Exhaust manifold)
• Exterior lights
• Fuel gauge
• Fuel level
• Fuel pump & sender
• Fuse block: i/p
• G110
• G202
• Gauges fuse 20a
• Generator (left top front of
• Gnd
• Harness)
• Headlights system
• High beam ind.
• Hot in run, bulb test or start
• Ign
• Ignition coil
• Ignition switch
• Illum.
• Illum. lamps
• Instrument cluster
• J i
• Lamps module
• Lamps module)
• Left turn ind.
• M/t only
• Malfunction ind.
• Module
• Of engine)
• Of transmission)
• Oil press.
• Oil press. gauge
• Oil pressure switch & sender (left rear of engine, under
• Only
• Over 15,000
• Panel lps fuse 5a
• Park brake warning switch (under left side of i/p)
• Pounds gvw
• Powertrain
• Rear anti-lock brake module (left rear of engine compt)
• Rear wheel abs
• Release relay)
• Right turn ind.
• Running lamps module
• Safety belt ind.
• Side of i/p, in
• Solenoid switch)
• Speed sensor
• Speedo- meter
• Switch)
• System
• Tach test connector
• Tacho- meter
• Tailgate release system (endgate window
• Tan
• Taped to i/p
• Transmissions
• Twisted pair
• Upshift ind.
• Variable voltage w/ head/park lamps on & dimmer sw adjusted
• Vehicle speed
• Vehicle speed sensor buffer (behind right side of i/p)
• Volt- meter
• W/ 4-wheel
• W/ drl
• W/ drl only
• W/o drl

INTERIOR LIGHTS

Courtesy Lamp Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Courtesy Lamp Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (at dlc )
• (at underhood lamp)
• Battery junction block (right rear engine compartment, at cowl)
• C239a
• Cargo lamp
• Cargo lamp switch
• Convenience center
• Courtesy switch
• Ctsy fuse 20a
• Front dome lamp
• Fuse block
• G127
• G206
• Hot at all times
• In-line fuse 5a (on cowl, near battery junction block)
• Left front door jamb switch
• Panel dimmer switch
• Red
• Right front door jamb switch
• Underhood reel lamp

Courtesy Lamp Wiring Diagram, Crew Cab with Auxiliary Lighting for Chevrolet Cab & Chassis C1994 3500

List of elements for Courtesy Lamp Wiring Diagram, Crew Cab with Auxiliary Lighting for Chevrolet Cab & Chassis C1994 3500:

• (at dlc)
• (at underhood lamp)
• (near front dome lamp)
• (near rear dome lamp)
• Battery junction block (right rear engine compartment, at cowl)
• C227
• C239a
• C269
• Cargo lamp
• Cargo lamp switch
• Convenience center
• Courtesy switch
• Crew cab only
• Ctsy fuse 20a
• Front dome and reading lamps
• Fuse block
• G127
• G206
• G908
• G909
• Hot at all times
• I/p compartment box lamp a
• In-line fuse 5a (on cowl, near battery junction block)
• Lamp
• Left front door jamb switch
• Left rear door jamb switch
• Nca
• Panel dimmer switch
• Rear dome and reading lamps
• Red
• Right front door jamb switch
• Right i/p courtesy lamp
• Right rear door jamb switch
• Underhood reel lamp

Courtesy Lamp Wiring Diagram, Crew Cab with Overhead Roof Console for Chevrolet Cab & Chassis C1994 3500

List of elements for Courtesy Lamp Wiring Diagram, Crew Cab with Overhead Roof Console for Chevrolet Cab & Chassis C1994 3500:

• (at dlc )
• (at underhood lamp)
• (near front dome lamp)
• Battery junction block (right rear engine compartment, at cowl)
• C227
• C239a
• Cargo lamp
• Cargo lamp switch
• Convenience center
• Courtesy switch
• Crew cab only
• Crew cab, suburban, utility w/overhead roof console
• Ctsy fuse 20a
• Front dome lamp
• Fuse block
• G127
• G206
• G908
• Hot at all times
• In-line fuse 5a (on cowl, near battery junction block)
• Left front door jamb switch
• Overhead roof console lamps
• Panel dimmer switch
• Rear dome lamp
• Red
• Right front door jamb switch
• Suburban/yukon base
• Underhood reel lamp

Instrument Illumination Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Instrument Illumination Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (5) bulbs
• (at dlc)
• (at right "d" pillar)
• Ashtray lamp
• Auxiliary a/c-heater front control lamp
• C203
• C206
• C215
• C224
• C258
• Convenience center
• Dim
• Four-wheel drive illumination lamp
• Fuse block
• G206
• G206 (at dlc)
• G998
• Head
• Headlight switch assembly
• Heater a/c control lamps
• Heater control lamps
• High
• Hot at all times
• Instrument cluster
• Light switch
• Off
• Panel dimmer switch assembly
• Park
• Park lp fuse 20a
• Pnl lps fuse 5a
• Radio
• Rear defogger lamp
• Solid state

POWER DISTRIBUTION

Power Distribution Wiring Diagram, Diesel (1 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Diesel (1 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (pcm)
• 4wal module
• Accy
• Audio alarm module convenience center
• Auxillary cooling fan relay
• Brake switch
• Bulb test
• C10
• C100
• C103a
• C231
• C255
• C256
• Cigarette lighter
• Clutch pedal switch
• Conven- ience center
• Convenience center
• Crank fuse 5a
• Ctsy fuse 20a
• Daytime running lamps relay
• Dome lamp
• Drl fuse 15a
• Ecm-ign, turn b/u & gauges fuses
• Exc. suburban & utility
• Fuel pump relay
• Fuel pump relay
• Fuel pump/oil pressure
• Fuse block
• Fusible
• Fusible link
• G206 (at data link connector)
• Generator
• Glow plug controller
• Glow plugs
• Hazard flasher
• Headlight switch assembly
• High blower relay
• Horn relay convenience center
• Htr-a/c, rr hvac, 4wd & brake fuses
• Ignition switch
• Left battery
• Link
• Lock
• Low blower relay
• Medium blower relay
• Off
• Park lps fuse 20a
• Pnk
• Powertrain control module
• Pwr acc circuit breaker
• Radio
• Rear wheel antilock brake module
• Rear window release relay
• Rear window release switch
• Red
• Right battery
• Rr wpr, frt wpr, rdo fuses and and pwr wdo circuit breaker
• Rst 12ga
• Rst 18ga
• Run
• Start
• Starter motor solenoid
• Stop fuse 15a
• Suburban & utility
• Suburban & utility only
• Switch
• T/g rel fuse 25a
• Trans
• Trans fuse
• W/ auto
• W/ automatic transmission

Power Distribution Wiring Diagram, Diesel (2 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Diesel (2 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (suburban & crew cab only)
• C241
• C247
• C259
• C276a
• Convenience center
• Frt wpr fuse 25a
• Fuse block
• Fusible link
• Ignition switch
• In-line fuse 3a
• Left front power window switch
• Left power door lock switch
• Left power seat
• Left rear power window switch
• O r g
• Pnk
• Power acc circuit breaker 30a
• Power door lock relay
• Power outside mirror switch
• Pwr wdo circuit breaker 30a
• Radio
• Rdo fuse 10a
• Rear window defogger switch
• Rear wiper/ washer switch
• Red
• Right front power window switch
• Right power door lock switch
• Right rear power window switch
• Rr wpr fuse 25a
• Suburban & utilty only
• W h t
• Wiper motor module
• Wiper washer switch

Power Distribution Wiring Diagram, Diesel (3 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Diesel (3 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (four wheel antilock)
• (rear wheel antlock)
• 4wd fuse 25a
• A/c clutch relay
• A/c control module
• Antilock brake module
• Auxilliary heater-a/c front control
• Auxilliary heater-a/c logic module
• Auxilliary heater-a/c rear control
• B r n
• Brake fuse 15a
• C1
• C10
• C2
• C5
• Convenience center
• Electronic transmission 4-speed automatic w/overdrive
• Fuse block
• Fusible
• Glow plug control module
• Glow plug fuse 5a
• Heater blower switch
• Heavy duty electronic transmission 4-speed automatic w/overdrive
• High blower relay
• Htr-a/c fuse 25a
• Ignition switch
• Instrument cluster printed ciurcuit
• Interior lights system
• Left glow plugs
• Low blower relay
• Med blower relay
• Mode door motor
• Panel dimmer switch assembly (interior lights system)
• Pnk
• Pnl lps fuse 5a
• Powertrain control module
• R e d
• Right glow plugs
• Rr hvac fuse 25a
• Temp door motor
• Trans fuse 10a
• Transfer case switch
• Vehicle speed sensor buffer module
• W/ air conditioning

Power Distribution Wiring Diagram, Diesel (4 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Diesel (4 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (l49 & l56 engines only)
• (l56 & l65 only)
• Audio alarm module convenience center
• Auxiliary cooling fan relay
• B l u
• Backup lamp switch
• C278
• C290
• Convenience center
• Cruise control activator switch
• Cruise control module
• Daytime running lamps module (pickup only)
• Daytime running lamps relay
• Ecm-ign fuse 10a
• Egr vent solenoid
• Egr width modulated solenoid
• F/sol fuse 20a
• Fuel heater
• Fuel injection pump
• Fuse block
• Gauges fuse 20a
• Glow plug control module
• Ignition switch
• Instrument cluster printed circuit
• O r g
• Pnk
• Powertrain control module
• Pulse width modulated boost solenoid
• Rear defogger switch
• Sol fuse 5a
• Tcc/ stoplamp switch
• Turn signal flasher
• Turn b/u fuse 15a
• Water-in-fuel sensor

Power Distribution Wiring Diagram, Gasoline (1 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Gasoline (1 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (pcm)
• 4wal module
• Accy
• Audio alarm module convenience center
• Auxillary cooling fan relay
• Battery
• Brake switch
• Bulb test
• C10
• C103a
• C231
• C255
• C256
• Cigarette lighter
• Clutch pedal switch
• Conven- ience center
• Convenience center
• Crank fuse 5a
• Ctsy fuse 20a
• Daytime running lamps relay
• Dome lamp
• Drl fuse 15a
• Ecm-ign, turn b/u & gauges fuses
• Exc. suburban & utility
• Fuel pump relay
• Fuel pump/oil pressure
• Fuse block
• Fusible
• Fusible link
• G206 (at data link connector)
• Generator
• Hazard flasher
• Headlight switch assembly
• High blower relay
• Horn relay convenience center
• Htr-a/c, rr hvac, 4wd & brake fuses
• Ignition coil
• Ignition switch
• L03 & l05 engines w/ manual transmissions only
• Link
• Lock
• Low blower relay
• Medium blower relay
• Off
• Park lps fuse 20a
• Pnk
• Powertrain control module
• Powertrain control module (pcm)
• Pwr acc circuit breaker
• Radio
• Rear wheel antilock brake module
• Rear window release relay
• Rear window release switch
• Red
• Rr wpr, frt wpr, rdo fuses and and pwr wdo circuit breaker
• Rst 12ga
• Rst 18ga
• Run
• Start
• Starter motor solenoid
• Stop fuse 15a
• Suburban & utility
• Suburban & utility only
• Switch
• T/g rel fuse 25a
• Trans
• Trans & inj fuses
• Vin h&k manual trans only
• W/ auto
• W/ automatic transmission

Power Distribution Wiring Diagram, Gasoline (2 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Gasoline (2 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (suburban & crew cab only)
• C241
• C247
• C259
• C276a
• Convenience center
• Frt wpr fuse 25a
• Fuse block
• Fusible link
• Ignition switch
• In-line fuse 3a
• Left front power window switch
• Left power door lock switch
• Left power seat
• Left rear power window switch
• O r g
• Pnk
• Power acc circuit breaker 30a
• Power door lock relay
• Power outside mirror switch
• Pwr wdo circuit breaker 30a
• Radio
• Rdo fuse 10a
• Rear window defogger switch
• Rear wiper/ washer switch
• Red
• Right front power window switch
• Right power door lock switch
• Right rear power window switch
• Rr wpr fuse 25a
• Suburban & utilty only
• W h t
• Wiper motor module
• Wiper washer switch

Power Distribution Wiring Diagram, Gasoline (3 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Gasoline (3 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (four wheel antilock)
• (rear wheel antlock)
• 4wd fuse 25a
• A/c clutch relay
• A/c control module
• Antilock brake module
• Auxilliary battery relay
• Auxilliary heater-a/c front control
• Auxilliary heater-a/c logic module
• Auxilliary heater-a/c rear control
• B r n
• Brake fuse 15a
• C1
• C10
• C2
• C5
• Convenience center
• Electronic transmission 4-speed automatic w/overdrive
• Except vin z
• Fuse block
• Heated oxygen sensor
• Heater blower switch
• Heavy duty electronic transmission 4-speed automatic w/overdrive
• High blower relay
• Htr-a/c fuse 25a
• Ignition switch
• Inj fuse 10a
• Interior lights system
• Low blower relay
• Med blower relay
• Mode door motor
• Panel dimmer switch assembly (interior lights system)
• Pnk
• Pnl lps fuse 5a
• R e d
• Red
• Rr hvac fuse 25a
• Temp door motor
• Throttle body fuel injector a
• Throttle body fuel injector b
• Trans fuse 10a
• Transfer case switch
• Vehicle speed sensor buffer module
• Vin z only
• W/ air conditioning

Power Distribution Wiring Diagram, Gasoline (4 of 4) for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Distribution Wiring Diagram, Gasoline (4 of 4) for Chevrolet Cab & Chassis C1994 3500:

• (lo3 & lo5 engines, light duty & yukon w/ lo5 engine)
• (suburban & utility only)
• (vin h &k light duty only)
• Air divert solenoid
• Air switching valve solenoid (vin n only)
• Audio alarm module convenience center
• Auxilliary cooling fan relay
• B l u
• Backup lamp switch
• C278
• C290
• Convenience center
• Cruise control activator switch
• Cruise control module
• Daytime running lamps module (pickup only)
• Daytime running lamps relay
• E15
• Ecm-ign fuse 10a
• Esc module
• Evaporative emission canister purge solenoid (w/ nrq)
• Exhaust gas recirculation solenoid valve
• F15
• Fuse block
• Gauges fuse 20a
• Heated oxygen sensor (vins h & k)
• Hot fuel handling module
• Ignition switch
• Instrument cluster printed circuit
• Linear egr regulator valve solenoid (w/ nrq)
• O r g
• Overspeed alarm module
• Pnk
• Powertrain control module
• Rear defogger switch
• Tcc/ stoplamp switch
• Trottle actuator solenoid (vin n only)
• Turn signal flasher convenience center
• Turn b/u fuse 15a
• Vin n only
• Vins h & k only
• Vins h & k w/ automatic transmissions & vins n & z
• Vins h & k w/ manual transmissions

POWER DOOR LOCKS

Door Lock Wiring Diagram, 2 Door for Chevrolet Cab & Chassis C1994 3500

List of elements for Door Lock Wiring Diagram, 2 Door for Chevrolet Cab & Chassis C1994 3500:

• (under left side of i/p)
• Acc-batt circuit breaker 30a
• Convenience center
• Fuse block
• G206 (at dlc connector)
• H tan
• Hot at all times
• Left front door lock motor
• Left front door lock switch
• Lock
• Right front door lock motor
• Right front door lock switch
• Tan
• Unlock

Door Lock Wiring Diagram, Crew Cab for Chevrolet Cab & Chassis C1994 3500

List of elements for Door Lock Wiring Diagram, Crew Cab for Chevrolet Cab & Chassis C1994 3500:

• (suburban only)
• Acc-batt circuit breaker 30a
• Contactor right rear cargo door (suburban only)
• Convenience center (under left side of i/p)
• Door lock relay (behind i/p, right side of brake pedal bracket)
• Fuse block
• G206 (at dlc connector)
• Hot at all times
• Left front door lock motor
• Left front door lock switch
• Left rear door lock motor
• Lock
• Power mirror system (in-line fuse)
• Rear cargo door lock motor
• Right front door lock motor
• Right front door lock switch
• Tan
• Unlock

POWER MIRRORS

Power Mirror Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Mirror Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• left outside power mirror
• Acc-batt circuit breaker 30a
• Convenience center (under left side of i/p)
• Convenience center (under left side of i/p)
• Down
• Fuse block
• G206 (at dlc connector)
• Hot at all times
• In-line fuse
• Left
• Left/ right motor
• Power outside rearview mirror switch
• Right
• Right outside power mirror
• Up/ down motor

POWER SEATS

Power Seat Wiring Diagrams for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Seat Wiring Diagrams for Chevrolet Cab & Chassis C1994 3500:

• 30a
• Acc-batt circuit breaker
• Back
• Convenience center (under left side of i/p)
• Down
• Entire seat
• For- ward
• Forward/ rearward motor
• Front height
• Front tilt motor
• Fuse block
• G206 (at dlc connector)
• Hot at all times
• Power seat switch (left side of driver's seat)
• Rear height
• Rear tilt motor
• Tan

POWER WINDOWS

Power Window Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Window Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (under left side of dash)
• Acc-ign circuit breaker (exc 1994) 30a
• C247
• C503
• C507
• Convenience center
• Fuse block
• G206 (at dlc connector)
• Hot in acc or run
• Left front power window motor
• Left front switch
• Left power window master switch
• Pnk
• Pwr-wdo circuit breaker (1994) 30a
• Right front power window motor
• Right front switch
• Right front window switch
• Tan

Power Window Wiring Diagram, Crew Cab for Chevrolet Cab & Chassis C1994 3500

List of elements for Power Window Wiring Diagram, Crew Cab for Chevrolet Cab & Chassis C1994 3500:

• (at dlc connector)
• (under left side of dash)
• Acc-ign circuit breaker (exc 1994) 30a
• C506
• C507
• Convenience center
• Fuse block
• G206
• Gauges fuse 20a
• Hot in acc or run
• Hot in run or start
• Left front power window motor
• Left front window
• Left rear power window motor
• Left rear window
• Left rear window switch
• Master window switch
• Pnk
• Pwr-wdo circuit breaker (1994) 30a
• Right front power window motor
• Right front window
• Right front window switch
• Right rear power window motor
• Right rear window
• Right rear window switch
• Switch illumination lamp
• Tan

RADIO

2-Speaker System Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 2-Speaker System Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (ex 1994) (1994)
• (ex. 1991)
• Antenna
• Antenna input
• Coaxial cable
• Ctsy fuse 20a
• Dimmer
• Fuse block (under left side of dash)
• G206 (center of dash)
• Ground
• Hot at all times
• Hot in accy or run
• Ign
• Interior lights system
• Left front speaker
• Lt frt spkr
• Memory(bat)
• Park lamp
• Radio
• Radio fuse 10a 15a
• Right front speaker
• Rt frt spkr
• Tan

AM/FM Stereo for Chevrolet Cab & Chassis C1994 3500

List of elements for AM/FM Stereo for Chevrolet Cab & Chassis C1994 3500:

• (ex 1994) (1994)
• Antenna
• Antenna out
• Battery
• C243
• C244
• C247
• C248
• C251
• Cassette deck
• Ctsy fuse 20a
• Data
• Dimmer
• Fuse block (under left side of dash)
• G206 (center of dash)
• Graphic equalizer
• Ground
• Hi ground
• Hot at all times
• Hot in accy or run
• Ignition
• Interior lights system
• Left audio
• Left front speaker
• Left rear speaker
• Lf (+)
• Lf (-)
• Lo ground
• Lr (+)
• Lr (-)
• Mem (data)
• Memory
• Mute
• Park lamp
• Pnk
• Power antenna system
• Radio control head
• Radio fuse 10a 15a
• Radio receiver
• Red
• Rf (+)
• Rf (-)
• Right audio
• Right front speaker
• Right rear speaker
• Rr (+)
• Rr (-)
• Tan
• Tape on
• Volt

AM/FM Stereo, with Cassette & Amplifier for Chevrolet Cab & Chassis C1994 3500

List of elements for AM/FM Stereo, with Cassette & Amplifier for Chevrolet Cab & Chassis C1994 3500:

• (ex 1994) (1994)
• Amplifier relay
• Antenna
• Antenna out
• Battery
• C10
• C11
• C12
• C13
• C14
• C15
• C243
• C244
• C247
• C248
• C251
• Cassette deck
• Convenience center (under left side of dash)
• Ctsy fuse 20a
• Data
• Dimmer
• Fuse block (under left side of dash)
• G206 (center of dash)
• Graphic equalizer
• Ground
• Hi ground
• Hot at all times
• Hot in accy or run
• Ignition
• Interior lights system
• Left audio
• Left front speaker
• Left rear side door speaker
• Left rear speaker
• Lf (+)
• Lf (-)
• Lo ground
• Lr (+)
• Lr (-)
• Lt rr door spkr
• Lt rr spkr
• Mem (data)
• Memory
• Mute
• Not used
• Park lamp
• Pnk
• Power amplifier relay (under dash, left of pedal bracket)
• Radio control head
• Radio fuse 10a 15a
• Radio power amplifier (under driver's seat)
• Radio receiver
• Red
• Rf (+)
• Rf (-)
• Right audio
• Right front speaker
• Right rear side door speaker
• Right rear speaker
• Rr (+)
• Rr (-)
• Rt rr door spkr
• Rt rr spkr
• Tan
• Tape on
• Volt

STARTING/CHARGING

4.3L

4.3L (VIN Z), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

4.3L (VIN Z), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

5.0L

5.0L (VIN H), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

5.0L (VIN H), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

5.7L

5.7L (VIN K), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

5.7L (VIN K), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

6.5L

6.5L (VIN F), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

6.5L (VIN F), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

6.5L (VIN P), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

6.5L (VIN P), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

6.5L (VIN S), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

6.5L (VIN S), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

7.4L

7.4L (VIN N), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Charging Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (12 ga. rust)
• (closes with low or high voltage; gen fault)
• (not
• (not used)
• (right front of engine)
• (right inner fender, near battery)
• (top left front of engine)
• Bat
• Battery junction block (right rear of engine compartment, at cowl)
• C109
• C203
• Charge indicator (red)
• Field (rotor)
• Fuse block
• Fusible link
• G101
• G110
• G119
• Gauges fuse 20a
• Generator (top left front of of engine)
• Hot in run, bulb test or start
• Indicators
• Instrument cluster
• Left battery
• Rectifier bridge
• Regulator solid-state
• Right battery
• Starter solenoid (lower right rear of engine, on starter motor)
• Stator
• Sw bat
• Turn on input
• Used)
• Volt sense input
• W/diesel engine
• W/gasoline engine

7.4L (VIN N), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Starting Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• (behind left side of instrument panel)
• (lower right side of engine)
• (lower right side of engine, on starter motor)
• (right front of engine)
• (right inner fender,near battery)
• (top left front of engine)
• (with diesel engine)
• Accy
• Battery junction block (right rear of
• Bulb test
• C255
• C256
• Clutch pedal is depressed) (at top of
• Clutch pedal)
• Clutch start switch (normally,open closes when
• Crank fuse
• Engine compartment, at cowl)
• Fuse block
• Fuse block (lower left side of instrument panel)
• Fusible link (12 ga. rust)
• G101
• G110
• G119
• Hold-in winding
• Ignition switch
• Left battery
• Lock
• Off
• Pull-in winding
• Pwr acc circuit breaker 30a
• Red
• Right battery
• Run
• Solenoid contacts
• Start
• Starter motor
• Starter solenoid
• Stop- hz fuse 15a
• W/auto trans
• W/man trans

TRANSMISSION

4.3L

4.3L (VIN Z), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

4.3L (VIN Z), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 4.3L (VIN Z), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

5.0L

5.0L (VIN H), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.0L (VIN H), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

5.7L

5.7L (VIN K), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 shift sol
• 3-2 shift sol ctrl
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Data link connector (below left side of i/p)
• Diagnostic test
• E10
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc
• Tcc sol
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sensor (right side of tbi)
• Tp reference
• Tp signal
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

5.7L (VIN K), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 5.7L (VIN K), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

6.5L

6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN F), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN P), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Transmission Wiring Diagram, 4L60-E for Chevrolet Cab & Chassis C1994 3500:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 3-2 control sol
• 3-2 shift sol
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc sol
• Tcc sol ctrl
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans output spd sig
• Transfer case switch
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN P), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN P), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

6.5L (VIN S), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 6.5L (VIN S), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (tft)
• (under right end of i/p)
• 1-2 shift sol
• 1-2 shift sol ctrl
• 2-3 shift sol
• 2-3 shift sol ctrl
• 4 wheel drive low sig
• A12
• Accelerator pedal position (app) module (top of acce- lerator bracket)
• App #1
• App #1 sensor 5v ref
• App #1 sensor ground
• App #1 sensor sig
• App #2
• App #2 sensor 5v ref
• App #2 sensor ground
• App #2 sensor sig
• App #3
• App #3 sensor 5v ref
• App #3 sensor ground
• App #3 sensor sig
• B10
• Battery feed
• Bracket)
• C11
• C12
• C13
• C14
• C15
• D11
• D12
• Data link connector (below left side of i/p)
• Diagnostic request
• E10
• E13
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (right side of engine)
• Fuse block
• G117 (right rear of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Pnk
• Powertrain control module
• Pressure control solenoid
• Pressure ctrl sol hi
• Pressure ctrl sol lo
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tan
• Tcc
• Tcc sol
• Tcc/ brake switch (on brake pedal support
• Tcc/brake sw
• Test or start
• Trans fluid temp
• Trans fluid temp sig
• Trans fuse 10a
• Trans input spd sig hi
• Trans input spd sig lo
• Trans output spd sig
• Transfer case switch
• Transmission input speed sensor (left side of transmission)
• Vehicle speed sensor buffer (under right end of i/p)
• Vehicle speed sig

Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

7.4L

7.4L (VIN N), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500

List of elements for 7.4L (VIN N), Transmission Wiring Diagram, 4L80-E for Chevrolet Cab & Chassis C1994 3500:

• (below left side of i/p) data link connector
• (left side of transmission) transmission input speed sensor
• (under right end of i/p)
• 1-2 shift sol
• 2-3 shift sol
• A14
• A15
• Battery feed
• Brake sig
• C10
• C13
• C14
• C215
• C218
• Dlc
• E13
• E15
• E16
• Ecm-ign fuse 10a
• Ect sig
• Electronic 4-speed automatic overdrive transmission
• Engine coolant temperature (ect) sensor (top front of engine)
• F10
• F12
• F13
• F14
• F15 f15
• Fuse block
• G110 (left top front of engine)
• Hot at all times
• Hot in run, bulb
• Hot in start or run
• Ignition feed
• Input speed hi
• Input speed lo
• Pcm trans shift sol a
• Pcm trans shift sol b
• Pnk
• Powertrain control module (pcm)
• Pressure control hi
• Pressure control lo
• Pressure control solenoid
• Range mode selector
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Sensor ground
• Serial data
• Speed sensor (left rear side of transmission)
• System ground
• Tcc sol
• Tcc sol ctrl
• Tcc/brake switch (top of brake pedal)
• Test or start
• Throttle position sens
• Throttle position sensor (right side of tbi)
• Tp reference
• Trans fluid temp (tft) sensor
• Trans fluid temp sig
• Trans fuse 10a
• Trans output speed
• Vehicle speed sensor buffer (under right end of i/p)
• Vss sig

Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, Except K300 for Chevrolet Cab & Chassis C1994 3500:

• module
• (under right end of i/p)
• 4 wheel drive input (not used)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control
• Convenience center (under left side of i/p)
• Ehcu module (near master cylinder)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Rwal diode module (under left side of i/p)
• Suburban, yukon
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case switch (left top of transfer case)
• W h t

Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500

List of elements for Transfer Case Wiring Diagram, K300 Only for Chevrolet Cab & Chassis C1994 3500:

• (under right end of i/p)
• 4 wheel drive low signal
• 4wd fuse 25a
• 4wd indicator lamp
• Automatic transmission only
• C215
• C215a
• C216a
• Control module
• Convenience center (under left side of i/p)
• Front axle actuator solenoid (right side of front drive axle)
• Front axle solenoid switch (right rear side of front drive axle)
• G206 (center of i/p, at dlc)
• Hot in run
• I/p fuse block
• Instrument cluster
• Panel dimmer switch assembly
• Panel lps fuse 5a
• Pickup
• Powertrain
• Red
• Rwal diode module (under left side of i/p)
• Transfer case mode selector illumination lamp (at transfer case selector lever)
• Transfer case relay (right rear of eng compt, near battery junction block)
• Transfer case switch (left top of transfer case)
• Transfer case syncronizer
• W h t

WARNING SYSTEMS

Warning System Wiring Diagrams for Chevrolet Cab & Chassis C1994 3500

List of elements for Warning System Wiring Diagrams for Chevrolet Cab & Chassis C1994 3500:

• Audio alarm module (on convenience center)
• Fasten belts indicator
• Fasten belts output
• Fuse block
• G206 (at dlc connector)
• Gauges fuse 20a
• Ground
• Hot at all times
• Hot in run, bulb test or start
• Hot with headlight switch in park or head
• Ignition on input
• Instrument cluster
• Key-in warning
• Key-in warning buzzer switch
• Left door jamb switch
• Lights on input
• Panel lps fuse 5a
• Power input
• Safety belt input
• Safety belt retractor switch (at driver's safety belt buckle)
• Stop fuse 15a
• Tan

WIPER/WASHER

Front Washer/Wiper Wiring Diagram for Chevrolet Cab & Chassis C1994 3500

List of elements for Front Washer/Wiper Wiring Diagram for Chevrolet Cab & Chassis C1994 3500:

• Control area
• Delay/ speed/ wash control
• Fuse block
• Fusible link
• G106 (above left headlamp)
• G114 (left rear of engine)
• Hot in accy or run
• Ign
• Low
• Mist
• Off
• Park switch
• Pnk
• Pulse
• Wash pulse switch
• Windshield washer pump (left front of engine compt, at washer resovoir)
• Windshield wiper motor module (center rear of engine compt)
• Windshield wiper/ washer switch
• Wiper fuse 25a