All Wiring Diagrams for GMC Cab & Chassis C1996 3500

AIR CONDITIONING

A/C Wiring Diagram for GMC Cab & Chassis C1996 3500

List of elements for A/C Wiring Diagram for GMC Cab & Chassis C1996 3500:

(7.4l vin j)
(left rear of engine compt)
(rear of compressor)
(right side
(right side of engine)
(right side of i/p)
A/c comp mini fuse 10a
A/c compressor clutch
A/c compressor clutch cycling switch (in low pressure line near compressor)
A/c compressor clutch relay (in underhood fuse/relay center)
A/c ctrl
A/c disable
A/c high pressure cutout switch (at a/c compressor)
A/c maxi fuse 3 50a
A/c req
A/c switch
Above starter motor)
Air temp dr sensor
Aux fan ctrl
Aux fan mini fuse 30a
Auxiliary cooling fan a/c pressure switch
Auxiliary cooling fan motor
Auxiliary cooling fan relay (7.4l vin j) (in underhood fuse/relay center)
Auxiliary cooling fan temperature switch (right cylinder head
Battery
Blower motor
Blower resistor (under right side of i/p, on heater housing)
Blower switch
C10
Center
Defogger element
Diesel
Diode
Front mode door motor (under i/p on heater- a/c case)
Front temperature door motor (under i/p on heater- a/c case)
Fuse block
G101 (right inner fender, near battery)
G120
G202 (behind left side of i/p)
Gas
Ground
Heater and a/c control module
High blower relay (under i/p on top of heater-a/c case)
Hot at all times
Hot in run
Hot in run bulb test or start
Hot in run or start
Htr a/c fuse 12 25a
Ign e mini fuse 10a
Ign mini fuse 10a
Ignition
Illumination
Interior lights system
Mode signal
Nca
Of engine)
Off
Pnk
Powertrain control module (diesel) vehicle control module (gas)
Rear defogger system
Recirculation door motor (under i/p on heater- a/c case)
Red
Tan
Underhood fuse-relay
Underhood fuse-relay center
Valve ctrl
Water valve (suburban, utility, crew cab only) (right center of intake area)

Heater Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Heater Wiring Diagram for GMC Cab & Chassis C1996 3500:

(right side of engine)
A/c maxi fuse 3 50a
Air temp dr sensor
Battery
Blower motor
Blower resistor (under right side of i/p, on heater housing)
Blower switch
C10
Defogger element
Front mode door motor (under i/p on heater- a/c case)
Front temperature door motor (under i/p on heater- a/c case)
Fuse block
G120
G202 (behind left side of i/p)
Ground
Heater and a/c control module
High blower relay (under i/p on top of heater-a/c case)
Hot in run
Htr a/c fuse 12 25a
Ignition
Illumination
Interior lights system
Mode signal
Off
Rear defogger system
Recirc ctrl
Recirculation door motor (under i/p on heater- a/c case)
Red
Tan
Underhood fuse-relay center

ANTI-LOCK BRAKES

5.0L

5.0L (VIN M), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500:

(left side of i/p) data link connector
(right lower front of engine)
4wd sw input
4wd telltale feed
Abs ind
Abs lamp control
Abs maxi fuse 4 60a
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch
Brake sw input
Brake sw output
Diode 1 (underhood fuse/relay center)
Diode d202 (near park brake switch)
Ebcm ground
G119
Gauges fuse 4 10a
Hot at all times
Hot in run
Hot in run, bulb test or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Nca
Pnk
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
Serial data line
Tan
Tcc/ stoplamp switch (top of brake pedal)
Underhood fuse-relay center
Vehicle control module (left front wheelhouse)
Vehicle speed sensor (left side of transmission/ transfer case)
Vehicle speed sig
Vss (+)
Vss (-)
Vss sig

5.7L

5.7L (VIN R), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500:

(left side of i/p) data link connector
(right lower front of engine)
4wd sw input
4wd telltale feed
Abs ind
Abs lamp control
Abs maxi fuse 4 60a
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch
Brake sw input
Brake sw output
Diode 1 (underhood fuse/relay center)
Diode d202 (near park brake switch)
Ebcm ground
G119
Gauges fuse 4 10a
Hot at all times
Hot in run
Hot in run, bulb test or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Nca
Pnk
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
Serial data line
Tan
Tcc/ stoplamp switch (top of brake pedal)
Underhood fuse-relay center
Vehicle control module (left front wheelhouse)
Vehicle speed sensor (left side of transmission/ transfer case)
Vehicle speed sig
Vss (+)
Vss (-)
Vss sig

6.5L

6.5L (VIN F), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500:

(left side of i/p) data link connector
(top right rear of engine)
4wd input c2
4wd sw input
A/t only
Abs ind
Abs lamp control
Abs maxi fuse 4 60a
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure warning switch
Brake sw input
Diode 1 (underhood fuse/relay center)
Diode d202 (near park brake switch)
Ebcm ground
Electronic brake control module (left front side of frame)
G117
Gauges fuse 4 10a
Hot at all times
Hot in run
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Nca
Pnk
Powertrain control module (right side of i/p)
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
Serial data line
Serial data signal
Tan
Underhood fuse-relay center
Vehicle speed sensor (left side of transmission)
Vehicle speed vss sig sensor buffer out (near steering column)
Vss (+)
Vss (-)
Vss sig

6.5L (VIN S), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Anti-lock Brake Wiring Diagrams for GMC Cab & Chassis C1996 3500:

(left side of i/p) data link connector
(top right rear of engine)
4wd input c2
4wd sw input
A/t only
Abs ind
Abs lamp control
Abs maxi fuse 4 60a
Brake fuse 18 10a
Brake ind
Brake lamp control
Brake pressure warning switch
Brake sw input
Diode 1 (underhood fuse/relay center)
Diode d202 (near park brake switch)
Ebcm ground
Electronic brake control module (left front side of frame)
G117
Gauges fuse 4 10a
Hot at all times
Hot in run
Hot in run or start
I/p fuse block
Ign
Instrument cluster
Left front wheel speed sensor
Lft frt sensor (+)
Lft frt sensor (-)
Nca
Pnk
Powertrain control module (right side of i/p)
Pump motor ground
Pump motor power
Red
Right front wheel speed sensor
Rt frt sensor (+)
Rt frt sensor (-)
Serial data line
Serial data signal
Tan
Underhood fuse-relay center
Vehicle speed sensor (left side of transmission)
Vehicle speed vss sig sensor buffer out (near steering column)
Vss (+)
Vss (-)
Vss sig

COMPUTER DATA LINES

Computer Data Lines for GMC Cab & Chassis C1996 3500

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List of elements for Computer Data Lines for GMC Cab & Chassis C1996 3500:

(diesel) g117 (rear of right cylinder head)
A11
Aux pwr fuse 7 25a
Brake pressure modulator valve (left front wheelhouse)
Data clss 2
Data link connector (below left side of i/p)
Diag enable
Diagnostic energy reserve module (behind center of i/p)
Diesel
Dlc control
G119 (gasoline) (right front of engine)
G202 (left side of i/p, below fuse block)
Gasoline
Hot at all times
I/p fuse block
Powertrain control module (behind right end of i/p)
Prog enable
Radio
Remote keyless entry module (behind center of i/p)
Tan
Transfer case control module (under i/p, on steering column support bracket)
Uart data
Vehicle control module (engine compt, near bpmv module)

CRUISE CONTROL

5.0L

5.0L (VIN M), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500:

4000 pulses/mile
A/t
A12
A13
A14
A15
Brake fuse 18 10a
Clutch pedal switch (top of clutch pedal)
Cruise control module (front of engine compt near left fender)
Cruise control switch
Cruise fuse 6 10a
Cruise on input
Cruise status
Disengage input
G120 (right side of engine)
Ground
Hot at all times
Hot in run
I/p fuse block
Ignition
M/t
Off
R/a
Resume/accel input
S/c
Set/coast input
Stop/haz fuse 1 20a
Tcc/stoplamp brake switch (top of brake pedal)
Vehicle control module (vcm) (in engine compt, on left fender)
Vehicle speed input
Vehicle speed sensor (vss) (left side of transmission)
Vss return
Vss signal

5.7L

5.7L (VIN R), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500:

4000 pulses/mile
A/t
A12
A13
A14
A15
Brake fuse 18 10a
Clutch pedal switch (top of clutch pedal)
Cruise control module (front of engine compt near left fender)
Cruise control switch
Cruise fuse 6 10a
Cruise on input
Cruise status
Disengage input
G120 (right side of engine)
Ground
Hot at all times
Hot in run
I/p fuse block
Ignition
M/t
Off
R/a
Resume/accel input
S/c
Set/coast input
Stop/haz fuse 1 20a
Tcc/stoplamp brake switch (top of brake pedal)
Vehicle control module (vcm) (in engine compt, on left fender)
Vehicle speed input
Vehicle speed sensor (vss) (left side of transmission)
Vss return
Vss signal

6.5L

6.5L (VIN F), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500:

A/t
A12
A13
A14
A15
Brake fuse 18 10a
Clutch pedal switch (top of clutch pedal)
Cruise fuse 6 10a
Cruise on input
D11
D15
Disengage input
Fuse block
Hot at all times
Hot in run
M/t
Multifunction lever
Off
Powertrain control module (pcm) (behind center of i/p)
R/a
Resume/accel input
S/c
Set/coast input
Stop/haz fuse 1 20a
Tcc/stoplamp switch (top of brake pedal)
Vehicle speed sensor (vss) (left side of transmission)
Vss return

6.5L (VIN S), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Cruise Control Wiring Diagram for GMC Cab & Chassis C1996 3500:

A/t
A12
A13
A14
A15
Brake fuse 18 10a
Clutch pedal switch (top of clutch pedal)
Cruise fuse 6 10a
Cruise on input
D11
D15
Disengage input
Fuse block
Hot at all times
Hot in run
M/t
Multifunction lever
Off
Powertrain control module (pcm) (behind center of i/p)
R/a
Resume/accel input
S/c
Set/coast input
Stop/haz fuse 1 20a
Tcc/stoplamp switch (top of brake pedal)
Vehicle speed sensor (vss) (left side of transmission)
Vss return

DEFOGGERS

Defogger Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Defogger Wiring Diagram for GMC Cab & Chassis C1996 3500:

C222
Convenience center (left side of i/p)
G202 (below fuse block)
G305 (right "b" pillar)
Hot at all times
Hot in run
Htr-a/c fuse 12 25a
Hvac control module
I/p fuse block
Left cargo door contactor
Left rear cargo door defogger grid
Pick-up w/ extended or crew cab
Rear defogger switch
Rear window defogger grid
Right cargo door contactor
Right rear cargo door defogger grid
Rr-defog mini fuse 30a
Solid state time delay relay
Suburban/utility w/ liftgate
Suburban/utility w/o liftgate
Underhood fuse/relay center

ENGINE PERFORMANCE

5.0L

5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500:

(attached to right rear of throttle body) idle air control (iac) valve motor
(lower right front portion of engine block, near crankshaft) crankshaft position sensor
(right side of engine) evaporative emission canister purge solenoid valve
1-2 shift sol. ctrl
2-3 shift sol. ctrl
A/c comp rly ctrl
A/c compressor clutch relay
Cam posit sens sig
Camshaft position sensor (in distributor)
Coil
Crank posit sens sig
Ect sens sig
Egr posit sig
Egr sol ctrl
Evap sol purge ctrl
G120 (right front of engine block)
Heated oxygen sensor no.1 (in exhaust pipe in front of right catalytic converter)
Heated oxygen sensor no.2 (in exhaust pipe in front of left catalytic converter)
Heated oxygen sensor no.3 (in exhaust pipe in back of right catalytic converter)
Iat sens sig
Idle air ctrl (iac) a hi
Idle air ctrl (iac) b lo
Ign feed
Ignition
Inj no.1 ctrl
Inj no.2 ctrl
Inj no.3 ctrl
Inj no.4 ctrl
Inj no.5 ctrl
Inj no.6 ctrl
Inj no.7 ctrl
Inj no.8 ctrl
Knock sens sig
Knock sensor (left side of engine block, below exhaust manifold, forward of starter)
Left post ctylst hi
Left post-ctylst lo
Left sens hi (precat)
Left sens lo (precat)
Map sens input
Mass air flow sens sig
Nca
Pnk
Pnk c ignition feed
Right post-ctlyst hi
Right post-ctlyst lo
Right sens hi (precat)
Right sens lo (precat)
Sens rtn
Sens sig
Sensor return
Shift sol. ctrl
Tan
Tcc sol ctrl
Tcc sol. ctrl
Temp sens input
Throttle posit sens
Underhood fuse-relay center
Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
Vehicle speed sensor (left rear side of transmission) (if equipped w/4wd) (left side of transfer case)
Vss rtn
Vss sig
Vss signal

5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500:

(w/4l60-e trans.)
(w/4l80-e trans.)
1-2 shift solenoid
2-3 shift solenoid
3-2 shift solenoid
Automatic transmission
Ecm-1 mini fuse 20a
Egr solenoid valve (front of engine near thermostat housing)
Eng-1 k7
Fluid temperature sensor (internal)
Force motor
Fuel inj. no.1
Fuel inj. no.2
Fuel inj. no.3
Fuel inj. no.4
Fuel inj. no.5
Fuel inj. no.6
Fuel inj. no.7
Fuel inj. no.8
Heated oxygen sensor no.4 (in exhaust pipe in back of left catalytic converter)
Hot in run & start
Ignition
Mini fuse 20a l8
Nca
Note: fuel injectors are located in central sfi, center of intake manifold)
Pnk
Pnk pnk pnk tan
Pressure switch
Red
Tan
Tcc solenoid
Under hood fuse-relay center
W/4l60e 4-speed trans. only

5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500:

(inside left frame rail, near rear crossmember) g415
(right front of engine, near thermostat housing) g119
(right top of cylinder head) g120
A/c high pressure cutout switch (on rear portion of a/c compressor)
Balance fuel pump (on inside left frame rail near front of rear tank)
Engine coolant temperature sensor (top right front of engine, near thermostat housing)
Evaporative emission canister purge vacuum switch (auto only) (right side of engine)
Fuel pump & sender (in fuel tank)
Fuel pump balance module (inside left side of frame rail near transmission crossmember)
Fuel pump balance relay (on fuel pump balance module)
Fuel pump/ oil pressure switch (top center rear of engine, behind distributor)
Gauges fuse 4 10a
Hot in off, run or start
Hot in run or start
Hot in run, or start
I/p fuse block
If equipped
Ign e f7
Ignition
Input fuel gauge
Input oil gauge
Input speed sensor (w/4l80-e transmission only)
Input tachometer
Instrument cluster
Intake air temperature sensor (in air intake duct)
M/t only
Map sensor (top right center of engine, near fuel injectors)
Mass air flow sensor (air intake duct near air filter)
Mini fuse 10a
Output to gage
Pnk
Pnk a
Pnk pnk tan
Primary tank fuel level signal
Relay ctrl
Service engine soon indicator
Speedometer input
Tan
Tan a
Throttle position sensor (on side of throttle body)
Trans fuse 20 10a
Underhood fuse-relay center pnk
Upshift lamp
W/dual fuel tanks
W/o dual fuel tanks
W/o dual fuel tanks

5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500:

(right top of cylinder head) g120
20a
4wd input
5v ref. voltage
A/c request signal
A/t
Brake pressure modulator valve (bpmv) (near brake master cylinder, at left front wheelhouse)
Brake sw input
Brake switch input
Check eng lp ctrl
Clutch pedal switch (open w/pedal depressed) (at top of clutch pedal)
Cruise control module (left rear side of engine compartment, on bulkhead)
Cruise ctrl sig eng
Cruise pdl sw out
Cyl. no.1
Cyl. no.2
Cyl. no.3
Cyl. no.4
Cyl. no.5
Cyl. no.6
Cyl. no.7
Cyl. no.8
Data link connector (under left side of i/p)
Distributor (top of engine, at rear, near bulkhead)
Ecm-b f11
Est output sig
Evap purge vac sw
Force motor feed
Force motor return
Four whl dr sig
Four whl dr sig lo
Fuel a pump prime connector
Fuel pump relay
Fuel pump rly ctrl
G120 (right top of cylinder head)
Ground
High voltage coil wire
Hot at all times
Hot in run
I/p fuse block
Ign coil out
Ign input
Ign timing sig.
Ignition
Ignition coil (right rear side of engine)
Ignition coil driver (right rear side of engine)
Ignition feed
M/t
M4 brake fuse 18 10a n3
Mini fuse g12
Pnk
Pnk a
Power
Pressure switch input
Radio
Red
Sensor ground
Sensor return
Serial data sig
Service circuit power
Shift ind lp out
Spark plugs
Speed sensor
Speed sensor input
Stoplamp/ clutch switch input
Tcc/ stoplamp switch (open w/brake pedal depressed) (top of brake pedal)
Trans input speed rtn
Trans input speed sig
Transfer case control module (under i/p, on steering column support bracket)
Transfer case switch (left top of transfer case)
Transmissions system (four wheel drive indicator circuit
Underhood fuse- relay center
Vcm sig
Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
Vss input
Vss sig out

5.7L

5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500:

(attached to right rear of throttle body) idle air control (iac) valve motor
(lower right front portion of engine block, near crankshaft) crankshaft position sensor
(right side of engine) evaporative emission canister purge solenoid valve
1-2 shift sol. ctrl
2-3 shift sol. ctrl
A/c comp rly ctrl
A/c compressor clutch relay
Cam posit sens sig
Camshaft position sensor (in distributor)
Coil
Crank posit sens sig
Ect sens sig
Egr posit sig
Egr sol ctrl
Evap sol purge ctrl
G120 (right front of engine block)
Heated oxygen sensor no.1 (in exhaust pipe in front of right catalytic converter)
Heated oxygen sensor no.2 (in exhaust pipe in front of left catalytic converter)
Heated oxygen sensor no.3 (in exhaust pipe in back of right catalytic converter)
Iat sens sig
Idle air ctrl (iac) a hi
Idle air ctrl (iac) b lo
Ign feed
Ignition
Inj no.1 ctrl
Inj no.2 ctrl
Inj no.3 ctrl
Inj no.4 ctrl
Inj no.5 ctrl
Inj no.6 ctrl
Inj no.7 ctrl
Inj no.8 ctrl
Knock sens sig
Knock sensor (left side of engine block, below exhaust manifold, forward of starter)
Left post ctylst hi
Left post-ctylst lo
Left sens hi (precat)
Left sens lo (precat)
Map sens input
Mass air flow sens sig
Nca
Pnk
Pnk c ignition feed
Right post-ctlyst hi
Right post-ctlyst lo
Right sens hi (precat)
Right sens lo (precat)
Sens rtn
Sens sig
Sensor return
Shift sol. ctrl
Tan
Tcc sol ctrl
Tcc sol. ctrl
Temp sens input
Throttle posit sens
Underhood fuse-relay center
Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
Vehicle speed sensor (left rear side of transmission) (if equipped w/4wd) (left side of transfer case)
Vss rtn
Vss sig
Vss signal

5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500:

(w/4l60-e trans.)
(w/4l80-e trans.)
1-2 shift solenoid
2-3 shift solenoid
3-2 shift solenoid
Automatic transmission
Ecm-1 mini fuse 20a
Egr solenoid valve (front of engine near thermostat housing)
Eng-1 k7
Fluid temperature sensor (internal)
Force motor
Fuel inj. no.1
Fuel inj. no.2
Fuel inj. no.3
Fuel inj. no.4
Fuel inj. no.5
Fuel inj. no.6
Fuel inj. no.7
Fuel inj. no.8
Heated oxygen sensor no.4 (in exhaust pipe in back of left catalytic converter)
Hot in run & start
Ignition
Mini fuse 20a l8
Nca
Note: fuel injectors are located in central sfi, center of intake manifold)
Pnk
Pnk pnk pnk tan
Pressure switch
Red
Tan
Tcc solenoid
Under hood fuse-relay center
W/4l60e 4-speed trans. only

5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500:

(inside left frame rail, near rear crossmember) g415
(right front of engine, near thermostat housing) g119
(right top of cylinder head) g120
A/c high pressure cutout switch (on rear portion of a/c compressor)
Balance fuel pump (on inside left frame rail near front of rear tank)
Engine coolant temperature sensor (top right front of engine, near thermostat housing)
Evaporative emission canister purge vacuum switch (auto only) (right side of engine)
Fuel pump & sender (in fuel tank)
Fuel pump balance module (inside left side of frame rail near transmission crossmember)
Fuel pump balance relay (on fuel pump balance module)
Fuel pump/ oil pressure switch (top center rear of engine, behind distributor)
Gauges fuse 4 10a
Hot in off, run or start
Hot in run or start
Hot in run, or start
I/p fuse block
If equipped
Ign e f7
Ignition
Input fuel gauge
Input oil gauge
Input speed sensor (w/4l80-e transmission only)
Input tachometer
Instrument cluster
Intake air temperature sensor (in air intake duct)
M/t only
Map sensor (top right center of engine, near fuel injectors)
Mass air flow sensor (air intake duct near air filter)
Mini fuse 10a
Output to gage
Pnk
Pnk a
Pnk pnk tan
Primary tank fuel level signal
Relay ctrl
Service engine soon indicator
Speedometer input
Tan
Tan a
Throttle position sensor (on side of throttle body)
Trans fuse 20 10a
Underhood fuse-relay center pnk
Upshift lamp
W/dual fuel tanks
W/o dual fuel tanks
W/o dual fuel tanks

5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500:

(right top of cylinder head) g120
20a
4wd input
5v ref. voltage
A/c request signal
A/t
Brake pressure modulator valve (bpmv) (near brake master cylinder, at left front wheelhouse)
Brake sw input
Brake switch input
Check eng lp ctrl
Clutch pedal switch (open w/pedal depressed) (at top of clutch pedal)
Cruise control module (left rear side of engine compartment, on bulkhead)
Cruise ctrl sig eng
Cruise pdl sw out
Cyl. no.1
Cyl. no.2
Cyl. no.3
Cyl. no.4
Cyl. no.5
Cyl. no.6
Cyl. no.7
Cyl. no.8
Data link connector (under left side of i/p)
Distributor (top of engine, at rear, near bulkhead)
Ecm-b f11
Est output sig
Evap purge vac sw
Force motor feed
Force motor return
Four whl dr sig
Four whl dr sig lo
Fuel a pump prime connector
Fuel pump relay
Fuel pump rly ctrl
G120 (right top of cylinder head)
Ground
High voltage coil wire
Hot at all times
Hot in run
I/p fuse block
Ign coil out
Ign input
Ign timing sig.
Ignition
Ignition coil (right rear side of engine)
Ignition coil driver (right rear side of engine)
Ignition feed
M/t
M4 brake fuse 18 10a n3
Mini fuse g12
Pnk
Pnk a
Power
Pressure switch input
Radio
Red
Sensor ground
Sensor return
Serial data sig
Service circuit power
Shift ind lp out
Spark plugs
Speed sensor
Speed sensor input
Stoplamp/ clutch switch input
Tcc/ stoplamp switch (open w/brake pedal depressed) (top of brake pedal)
Trans input speed rtn
Trans input speed sig
Transfer case control module (under i/p, on steering column support bracket)
Transfer case switch (left top of transfer case)
Transmissions system (four wheel drive indicator circuit
Underhood fuse- relay center
Vcm sig
Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
Vss input
Vss sig out

6.5L

6.5L (VIN F), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500:

(front of engine)
(inside injection pump) crank sensor
(left lower front of engine) coolant temperature sensor
(on bulkhead, right of steering column) manifold absolute jr pressure sensor
(right top of cylinder head) g119
12v
3/2 shift sol.
4wd signal
5 vref
5v ref volt
A/c request sig
A/c system
A10
A11 3 mode cruise a12
Anti-lock brake system
B10
B11
B12
Baro sensor input
Barometric pressure sensor (vin s only) (upper left side of cowl)
Brake sw in
Brake switch input
C10
C11
C12
C13
C14
C15
C16
Cam posit sens sig rtn
Camshaft posit sens
Closure gnd
Controls system
Cruise control
Cruise ctrl sw engage
Cruise eng sw retard
D10
D11
D12
D13
D14
D15
D16
Ect temp sens in
Engine crank sens input
Force motor
Force mtr hi
Force mtr low
Fuel pump input
Fuel pump rly ctrl
Fuel sol closure (5v sig)
Fuel temp sens (5v sig)
Glow plug "wait" lp out
Glow plug relay
Ground
Heavy duty electronic 4-spd automatic overdrive transmission
Intake man air temp sens
Intake manifold air temperature sensor
Map sens input
On/off
Pcs low
Pnk
Powertrain control module (pcm) (under right end of i/p, above blower motor)
Radio
Range mode sel a
Range mode sel b
Range mode sel c
Range mode selector
Red
Resume
Second vss sig
Sensor gnd
Sensor return
Set
Shift sol. a
Shift sol. b
Switch
Tan
Timing stepper mtr (high)
Timing stepper mtr (low)
Tps no.1 gnd
Tps no.1 ref volt
Tps no.1 sig
Tps no.2 gnd
Tps no.2 sig
Tps no.3 gnd
Tps no.3 ref volt
Tps no.3 sig
Transmission
Transmission input speed sensor (left side of transmission near front)
Transmission speed input
Transmission temp input
Transmission temperature sensor
Vehicle speed input
Vehicle speed sensor (on transmission, left rear side)
Vehicle speed sensor buffer (below left side of i/p)
Vss hi
Vss lo
Vss rtn
Vss sig

6.5L (VIN F), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500:

(a/t)
(m/t)
(top front of engine)
(top of clutch pedal)
Brake pressure modulator valve (left front wheelhouse)
Clutch pedal switch (m/t only)
D2 trans fuse 20 10a e7
D8 stop/haz fuse 1 20a c7
Ecm 1 fuse 20a
Electronic injection pump
Electronic throttle actuator control module (above accelerator pedal)
Fuel sol fuse 20a
Hot at all times
Hot in run
Hot in run, bulb test or start
I/p fuse block
M4 brake fuse 18 10a n2
Pnk
Pnk pnk
Red
Tan d
Tcc/stoplamp switch (top of brake pedal)
Underhood fuse-relay center

6.5L (VIN F), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500:

(left frame rail, below driver's door)
(right top of cylinder head)
(right top of cylinder head) g119
Ecm-b fuse 20a
F11
Fuel lift pump
Fuel pump prime connector
Fuel pump relay (in underhood fuse-relay center)
Fuel pump/ oil pressure switch and sender (left rear of engine)
G119
G12
Gauges fuse 4 10a
Hot at all times
Hot in run, bulb test or start
I/p fuse block
Instrument cluster
Instrument cluster system
Pnk
Red
Service engine soon indicator
Service throttle soon indicator
Speedometer
Tan
Underhood fuse-relay center
Wait to start "glow plugs" indicator
Water in fuel indicator
Water in-fuel indicator sensor

6.5L (VIN F), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500:

"serv eng soon" ind
"serv throttle soon" ind
(left side of i/p)
12v battery (fused)
12v battery fused
3/2 ctrl out
A/c enable
A/c system
Brake pressure modulator valve (at left front wheelhouse)
C10
C11
C12
C13
C14
C15
C16
D10
D11
D12
D13
D14
D15
D16
Data link connector (dlc)
Egr sol output
Egr valve sol putput
Eng-i k7
Engine shutoff sol out
Exhaust gas recirculation boost pulse width modulation solenoid valve
Exhaust gas recirculation pulse width modulation solenoid valve (vin s only) (left rear top of engine)
Exhaust gas recirculation valve solenoid (vin s only)
Fuel heater (top rear of engine)
Fuel sol module (5 vref)
Fuel sol module feed
Fuse 10a
Fuse 20a
Fusible link
Fusible links
G119 (right top of cylinder head)
Glow plug control module (left rear of engine near bulkhead)
Glow plugs g4
Hot at all times
Hot in run, bulb test or start
Ignition
Left bank glow plugs
Nca
Pcm gnd
Pnk
Powertrain control module (pcm) (under right end of i/p, above blower motor)
Red
Right bank glow plugs
Serial data sig
Shift sol a input
Shift sol b input
Tan
Tps no.2 ref voltage
Turbo chgr pwr vlv ctrl
Underhood fuse-relay center

6.5L (VIN S), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C1996 3500:

(front of engine)
(inside injection pump) crank sensor
(left lower front of engine) coolant temperature sensor
(on bulkhead, right of steering column) manifold absolute jr pressure sensor
(right top of cylinder head) g119
12v
3/2 shift sol.
4wd signal
5 vref
5v ref volt
A/c request sig
A/c system
A10
A11 3 mode cruise a12
Anti-lock brake system
B10
B11
B12
Baro sensor input
Barometric pressure sensor (vin s only) (upper left side of cowl)
Brake sw in
Brake switch input
C10
C11
C12
C13
C14
C15
C16
Cam posit sens sig rtn
Camshaft posit sens
Closure gnd
Controls system
Cruise control
Cruise ctrl sw engage
Cruise eng sw retard
D10
D11
D12
D13
D14
D15
D16
Ect temp sens in
Engine crank sens input
Force motor
Force mtr hi
Force mtr low
Fuel pump input
Fuel pump rly ctrl
Fuel sol closure (5v sig)
Fuel temp sens (5v sig)
Glow plug "wait" lp out
Glow plug relay
Ground
Heavy duty electronic 4-spd automatic overdrive transmission
Intake man air temp sens
Intake manifold air temperature sensor
Map sens input
On/off
Pcs low
Pnk
Powertrain control module (pcm) (under right end of i/p, above blower motor)
Radio
Range mode sel a
Range mode sel b
Range mode sel c
Range mode selector
Red
Resume
Second vss sig
Sensor gnd
Sensor return
Set
Shift sol. a
Shift sol. b
Switch
Tan
Timing stepper mtr (high)
Timing stepper mtr (low)
Tps no.1 gnd
Tps no.1 ref volt
Tps no.1 sig
Tps no.2 gnd
Tps no.2 sig
Tps no.3 gnd
Tps no.3 ref volt
Tps no.3 sig
Transmission
Transmission input speed sensor (left side of transmission near front)
Transmission speed input
Transmission temp input
Transmission temperature sensor
Vehicle speed input
Vehicle speed sensor (on transmission, left rear side)
Vehicle speed sensor buffer (below left side of i/p)
Vss hi
Vss lo
Vss rtn
Vss sig

6.5L (VIN S), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C1996 3500:

(a/t)
(m/t)
(top front of engine)
(top of clutch pedal)
Brake pressure modulator valve (left front wheelhouse)
Clutch pedal switch (m/t only)
D2 trans fuse 20 10a e7
D8 stop/haz fuse 1 20a c7
Ecm 1 fuse 20a
Electronic injection pump
Electronic throttle actuator control module (above accelerator pedal)
Fuel sol fuse 20a
Hot at all times
Hot in run
Hot in run, bulb test or start
I/p fuse block
M4 brake fuse 18 10a n2
Pnk
Pnk pnk
Red
Tan d
Tcc/stoplamp switch (top of brake pedal)
Underhood fuse-relay center

6.5L (VIN S), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C1996 3500:

(left frame rail, below driver's door)
(right top of cylinder head)
(right top of cylinder head) g119
Ecm-b fuse 20a
F11
Fuel lift pump
Fuel pump prime connector
Fuel pump relay (in underhood fuse-relay center)
Fuel pump/ oil pressure switch and sender (left rear of engine)
G119
G12
Gauges fuse 4 10a
Hot at all times
Hot in run, bulb test or start
I/p fuse block
Instrument cluster
Instrument cluster system
Pnk
Red
Service engine soon indicator
Service throttle soon indicator
Speedometer
Tan
Underhood fuse-relay center
Wait to start "glow plugs" indicator
Water in fuel indicator
Water in-fuel indicator sensor

6.5L (VIN S), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C1996 3500:

"serv eng soon" ind
"serv throttle soon" ind
(left side of i/p)
12v battery (fused)
12v battery fused
3/2 ctrl out
A/c enable
A/c system
Brake pressure modulator valve (at left front wheelhouse)
C10
C11
C12
C13
C14
C15
C16
D10
D11
D12
D13
D14
D15
D16
Data link connector (dlc)
Egr sol output
Egr valve sol putput
Eng-i k7
Engine shutoff sol out
Exhaust gas recirculation boost pulse width modulation solenoid valve
Exhaust gas recirculation pulse width modulation solenoid valve (vin s only) (left rear top of engine)
Exhaust gas recirculation valve solenoid (vin s only)
Fuel heater (top rear of engine)
Fuel sol module (5 vref)
Fuel sol module feed
Fuse 10a
Fuse 20a
Fusible link
Fusible links
G119 (right top of cylinder head)
Glow plug control module (left rear of engine near bulkhead)
Glow plugs g4
Hot at all times
Hot in run, bulb test or start
Ignition
Left bank glow plugs
Nca
Pcm gnd
Pnk
Powertrain control module (pcm) (under right end of i/p, above blower motor)
Red
Right bank glow plugs
Serial data sig
Shift sol a input
Shift sol b input
Tan
Tps no.2 ref voltage
Turbo chgr pwr vlv ctrl
Underhood fuse-relay center

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Backup Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500:

(left side of trans.) backup lamp switch
A/t
C218
Convenience center (under left side of i/p)
G415 (left frame rail, behind bumper)
Hot in run, bulb test or start
I/p fuse block
Left backup lamp
M/t
Mirrors system
Park/neutral position switch (left top of trans.)
Pnk
Right backup lamp
Trailer tow backup lamps (w/ trailer tow pkg.) (wire lead is to be spliced to trailer wiring harness or attached to trailer wire plug)
Turn b/u fuse 16 20a

Exterior Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Exterior Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500:

(frame ground: at rear of vehicle)
Ance lamp
Auxiliary lead (taped to harness)
Backup lights circuit
C219
C220
Cargo lamp
Cargo lamp switch
Center high mount stop lamp
Ch- msl lp
Clear-
Convenience center (under left side of i/p)
Cr lp
Cruise control system
Ctsy fuse 20a
G108 (left radiator support, near left headlamp)
G120 (gas: right front of engine block; diesel: right top of cylinder head)
G1o1 (right inner fender, below underhood reel lamp)
G202 (behind left side of i/p)
G305 (right "b" pillar)
G415 (left frame rail, behind bumper)
H9 turn pwr h8 haz pwr h7 flshr out g8 gnd
Haz sw
Hazard
Headlamp & panel dimmer switch
Headlights system
Hot at all times
Hot in run, bulb test or start
I/p fuse block
Identification lamps
Instru- ment cluster
Interior lights system
Left
Left clear- ance lamp
Left front marker lamp
Left front park/ turn lamps
Left tail/ stop/ turn lamp
Left turn ind.
License lamp
License lamps
Maxi fuse 30a
Nca
Normal
Off
Parade mode sw
Park
Park lps fuse 9 20a
Platform hitch ground
Pnk
Rear clear- ance lamps circuit
Rear clearance lamps circuit
Red
Rheo- stat
Right
Right front marker lamp
Right front park/ turn lamps
Right tail/ stop/ turn lamp
Right turn ind.
Stop- lamp relay (except subur- ban/ utility)
Stop/ haz fuse 1 15a
Suburban/ utility
Tcc/ stop lamp switch (top of brake pedal)
Tn sw
Turn- b/u fuse 16 15a
Turn/ hazard switch
Turn/hazard flasher (convenience center: under left side of i/p)
Under- hood fuse relay center (left rear of engine compt.)
Under- hood fuse- relay center (left rear of engine compt.)
W/ dual rear wheels
W/ step bumper
W/o step bumper
W/optional trailer tow package
Wire leads are to be spliced to trailer wiring harness or attached to trailer wire plug.

Rear Clearance Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Rear Clearance Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500:

C406
C408
End- gate mark- er lamps
Endgate cround
Exterior lamps circuit
G415 (left frame rail, behind bumper)
Headlamp & panel dimmer switch
Hot at all times
I/p fuse block
Left front clear- ance lamp
Left rear clear- ance lamp
Left rear fender
Left tail/ stop/ turn lamp
Off
Parade mode sw
Park
Park lps fuse 9 20a
Rheo- stat
Right front clear- ance lamp
Right rear clear- ance lamp
Right rear fender
Right tail/ stop/ turn lamp

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for GMC Cab & Chassis C1996 3500:

(left front of intake manifold)
(right front of engine)
7.4l only
A16
Ashtray lamp
Auxiliary battery relay
Auxiliary cooling fan motor
Auxiliary fan control switch
Auxiliary power outlet
Battery
Btsi ground
C10
Cargo lamp switch (pickup)
Cigarette lighter assembly
Convenience center
D10
D12
D13
Data link connector
Daytime running lights module
Fog lamp switch
From conven- ience center
G101 (right front wheelhouse)
G101 (right inner fender, below underhood reel lamp)
G105 (right rear of engine compt)
G108 (left radiator support, near left headlamp)
G110 (diesel)
G117 (right rear of engine)
G119 (gasoline)
G202 (behind left side of i/p)
Glove box lamp
Headlamp dimmer switch
Heater/ a/c control switch
Ignition switch ground
Instrument cluster
Left fog lamp
Left front door jamb switch
Left front park/ turn lamp
Left front windshield wiper/ washer pump motor
Left high beam headlamp
Left high/ low beam headlamp
Left horn
Left low beam headlamp
Low coolant level indicator module (diesel)
Radio
Rear liftgate release switch (suburban/ utility)
Rear window washer pump motor
Rear window wiper/ washer switch
Rear window wiper/ washer switch (suburban/ utility)
Right fog lamp
Right front door jamb switch
Right front park/ turn lamp
Right high beam headlamp
Right high/ low beam headlamp
Right horn
Right low beam headlamp
Steering column ground
Transfer case control module
Transfer case select switch
Uncoated
W/ dual horns
W/ v22 (quad headlamps)
W/o v22 (quad headlamps)
Windshield wiper motor module

Ground Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis C1996 3500:

(right front of engine block) (gasoline) (right top of cylinder head) (diesel)
4.3l m/t
A/c compressor clutch
A/c compressor clutch relay
Air reaction injection pump (7.4l only)
Auxiliary cooling fan a/c pressure switch
Balance fuel gage sender
Blower motor
Brake pressure modulator valve
Brake pressure warning switch
Cruise control module
Data link connector
Diesel
Diesel engines
Diode
Evaporative emissions purge vacuum solenoid switch
Except 4.3l m/t
Front axle actuator
Fuel heater
Fuel pump
Fuel pump and sender
Fuel pump balance module
Fuel pump relay
G119 (right front of engine)
G120
G120 (right top of cylinder head)
Gasoline
Gasoline engines
Gasoline engines except 4.3l m/t
Glow plug relay
High blower motor relay
Ignition coil driver
Instrument cluster
Left heated oxygen sensor
Left heated oxygen sensor (post catalyst)
Low coolant level sensor
Mass air flow sensor
Mode door motor
Park/ neutral position switch
Recirculation door motor
Right heated oxygen sensor
Right heated oxygen sensor (post catalyst)
Starter relay
Stoplamp relay
Temperature door motor
Under- hood lamp
Under- hood reel lamp
Underhood fuse- relay center
Vehicle control module
W/ dual tanks
Water in fuel sensor
Water valve (except 4.3l m/t)

Ground Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis C1996 3500:

Auxiliary fuel pump and sender
C210
C220
Center high mount stop- lamp
Convenience center
Convenience center (under left side of i/p)
Data link connector
Diesel engines
Door lock relay
Electrochromic rearview mirror w/ compass
Four-wheel drive indicator lamp
Fuel pump and sender
Fuel pump balance module
Fuel pump relay
G120 (right top of cylinder head)
Illuminated entry module
Instrument cluster
Left illuminated vanity mirror
Left rear power window switch
Left side clearance lamp
Power amplifier
Power amplifier relay
Power outside rearview mirror switch
Power seat
Power window/ lock switch
Powertrain control module
Rear window lockout switch
Remote keyless entry module
Right front power window switch
Right illuminated vanity mirror
Right rear power window switch
Right side clearance lamp
Roof marker lamps
Seat belt switch
To g202
Transfer case mode selector illumination lamp
Under- hood fuse- relay center
Vehicle speed sensor buffer

Ground Distribution Wiring Diagram (4 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for GMC Cab & Chassis C1996 3500:

Arming sensor
Auxiliary heater/ a/c logic module
Balance fuel pump
Center high mount stoplamp
Chassis cab & heavy duty
Diagnostic energy reserve module
Door contact button
Endgate
Except chassis cab & heavy duty
Front auxiliary heater-a/c control module
Fuel lift pump
G119 (right front of engine, near thermostat housing)
G202 (behind left side of i/p, below fuse block)
G305 (right 'b' pillar)
G305 (right b pillar)
G415 (left frame rail, behind bumper)
Left cargo door defogger grid
Left front clearance lamp
Left license lamp
Left rear clearance lamp
Left rear fender
Left rear tail, stop, license, turn & backup lamps
Left rear tail, stop, turn & backup lamps
Left tail, stop, turn & backup lamps
Pickup w/ dual rear wheels
Rear auxiliary blower motor
Rear auxiliary heater-a/c control module
Rear auxiliary mode door motor
Rear auxiliary temp door motor
Rear endgate window defogger grid
Rear wiper motor module
Right cargo door defogger grid
Right front clearance lamp
Right gas strut
Right license lamp
Right rear clearance lamp
Right rear door jamb switch
Right rear fender
Right rear tail, stop, license, turn & backup lamps
Right right tail, stop, turn & backup lamps
Right tail, stop, turn & backup lamps
Suburban & utility
Trailer ground (taped back)

HEADLIGHTS

Headlight Wiring Diagram, with Quad Headlamps for GMC Cab & Chassis C1996 3500

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List of elements for Headlight Wiring Diagram, with Quad Headlamps for GMC Cab & Chassis C1996 3500:

Bulb check
C266
Daytime running lamps (drl) module (under left side of i/p, taped to i/p harness)
Daytime running lamps (drl) relay (under left side of i/p, on convenience center)
Diode 203 (i/p harness, right side of steering column)
Diode d202 (i/p harness, near park brake)
Drl indi- cator
Drl relay ctrl
Drl-fog fuse 15 20a
Exterior lights system
Fog lamp relay (under left end of i/p)
Fog lamp switch
Fog lamps
G101 (right front of engine compt.)
G108 (left radiator support)
G119 (right front of engine)
G202 (behind left side of i/p)
Gages fuse 4 10a
Ground
Head
Head- lamp dimmer switch
Headlamp & panel dimmer switch
Hi beam indi- cator
Hot at all times
Hot in run, bulb test or start
I/p fuse block
Ignition
Ignition switch
Illum lamp
Instrument cluster
Instrument cluster system
Interior lights system
Lamp feed
Left fog lamp
Left hi beam head- lamp
Left lo beam head- lamp
Nca
Off
On indicator
Park
Park brake warning switch (on park brake)
Pnk
Right fog lamp
Right hi beam head- lamp
Right lo beam head- lamp
Tan
W/ fog lamps

Headlight Wiring Diagram, with Sealed Beam Lamps for GMC Cab & Chassis C1996 3500

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List of elements for Headlight Wiring Diagram, with Sealed Beam Lamps for GMC Cab & Chassis C1996 3500:

(or 1134)
Bulb check
C266
Daytime running lamps (drl) module (under left side of i/p, taped to i/p harness)
Daytime running lamps (drl) relay (under left side of i/p, on convenience center)
Diode 203 (i/p harness, right side of steering column)
Diode d202 (i/p harness, near park brake)
Drl indi- cator
Drl relay ctrl
Drl-fog fuse 15 20a
Exterior lights system
Fog lamp relay (under left end of i/p)
Fog lamp switch
Fog lamps
G101 (right front of engine compt.)
G108 (left radiator support)
G119 (right front of engine)
G202 (behind left side of i/p)
Gages fuse 4 10a
Ground
Head
Head- lamp dimmer switch
Headlamp & panel dimmer switch
Hi beam indi- cator
Hot at all times
Hot at all times c
Hot in run, bulb test or start
I/p fuse block
Ignition
Ignition switch
Illum lamp
Instrument cluster
Instrument cluster system
Interior lights system
Lamp feed
Left fog lamp
Left head- lamp
Nca
Off
On indicator
Park
Park brake warning switch (on park brake)
Pnk
Right fog lamp
Right head- lamp
Tan
W/ fog lamps

HORN

Horn Wiring Diagram for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for Horn Wiring Diagram for GMC Cab & Chassis C1996 3500:

G101 (right front of engine comp)
Horn mini fuse 20a
Horn relay
Horn slip ring
Horn switch
Hot at all times
Left horn (front of vehicle)
Nca
Right horn (front of vehicle)
Steering wheel
Underhood fuse-relay center

INSTRUMENT CLUSTER

5.0L

5.0L (VIN M), Instrument Cluster Wiring Diagram for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 5.0L (VIN M), Instrument Cluster Wiring Diagram for GMC Cab & Chassis C1996 3500:

(6 bulbs)
(near park brake switch) diode
A/t
Accy
Air bag
Anti- lock brakes
Anti-lock brakes system
Balance fuel gage sender (in rear fuel tank)
Bat
Belt
Brake
Brake ind in
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch (on rear of brake pressure modulator valve body)
Bulb test
Check gauges
Check gauges lamp driver
Daytime running lamps
Daytime running lamps module (left side of i/p)
Diode 1
Engine controls system (fuel pump balance relay)
Engine coolant temperature sender (left cylinder head)
Exterior lights system
Fuel gauge
Fuel pump & sender (in front fuel tank)
Fuel pump & sender (in fuel tank)
Fuel pump balance module (near transmission crossmember)
Fuel pump/ oil pressure switch & sender (left rear side of engine)
G119 (near thermostat housing)
G119 (right front of engine block)
G202 (behind left side of i/p)
Gauges fuse 4 10a
Headlights system
Hi beam
Hot in run or start
Hot in run, bulb test or start
I/p fuse block (behind left side of i/p)
Ign
Ign e mini fuse 10a
Ignition coil (right rear side of engine)
Ignition switch
Illum
Illumination
Instrument cluster
Interior lights system
Led dimming
Left turn
Lock
M/t
Mil ind
Nca
Off
Oil gauge
Parity prndl
Park brake warning switch (left side of i/p)
Pnk
Prndl
Prndl a
Prndl b
Prndl c
Right turn
Run
Safety
Service engine soon
Speedo
Speedometer
Start
Starting/charging system
Tach
Tan
Temp gauge
Trans fuse 20 10a
Transmission range selector (left side of transmission)
Twisted pair
Underhood fuse- relay center
Underhood fuse-relay center (left rear of engine compt)
Upshift (m/t only)
Upshift ind
Vehicle control module (left front wheelhouse)
Vehicle speed sensor (left rear of transmission)
Voltmeter
Vss
W/ dual fuel tanks
W/o dual fuel tanks
Warning systems

5.7L

5.7L (VIN R), Instrument Cluster Wiring Diagram for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 5.7L (VIN R), Instrument Cluster Wiring Diagram for GMC Cab & Chassis C1996 3500:

(6 bulbs)
(near park brake switch) diode
A/t
Accy
Air bag
Anti- lock brakes
Anti-lock brakes system
Balance fuel gage sender (in rear fuel tank)
Bat
Belt
Brake
Brake ind in
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch (on rear of brake pressure modulator valve body)
Bulb test
Check gauges
Check gauges lamp driver
Daytime running lamps
Daytime running lamps module (left side of i/p)
Diode 1
Engine controls system (fuel pump balance relay)
Engine coolant temperature sender (left cylinder head)
Exterior lights system
Fuel gauge
Fuel pump & sender (in front fuel tank)
Fuel pump & sender (in fuel tank)
Fuel pump balance module (near transmission crossmember)
Fuel pump/ oil pressure switch & sender (left rear side of engine)
G119 (near thermostat housing)
G119 (right front of engine block)
G202 (behind left side of i/p)
Gauges fuse 4 10a
Headlights system
Hi beam
Hot in run or start
Hot in run, bulb test or start
I/p fuse block (behind left side of i/p)
Ign
Ign e mini fuse 10a
Ignition coil (right rear side of engine)
Ignition switch
Illum
Illumination
Instrument cluster
Interior lights system
Led dimming
Left turn
Lock
M/t
Mil ind
Nca
Off
Oil gauge
Parity prndl
Park brake warning switch (left side of i/p)
Pnk
Prndl
Prndl a
Prndl b
Prndl c
Right turn
Run
Safety
Service engine soon
Speedo
Speedometer
Start
Starting/charging system
Tach
Tan
Temp gauge
Trans fuse 20 10a
Transmission range selector (left side of transmission)
Twisted pair
Underhood fuse- relay center
Underhood fuse-relay center (left rear of engine compt)
Upshift (m/t only)
Upshift ind
Vehicle control module (left front wheelhouse)
Vehicle speed sensor (left rear of transmission)
Voltmeter
Vss
W/ dual fuel tanks
W/o dual fuel tanks
Warning systems

6.5L

6.5L (VIN F), Instrument Cluster Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Instrument Cluster Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500:

(6 bulbs)
Air bag
Anti- lock brakes
Anti-lock brakes system
Bat
Brake
Check gauges
Check gauges lamp driver
Daytime running lamps
Engine controls system
Engine coolant temperature sender (left side of engine block)
Exterior lights system
Fuel gauge
G117 (top rear of right cylinder head)
G202 (left side of i/p)
Generator
Gnd
Headlights system
Hi beam
Ign
Illum
Illumination
Instrument cluster
Interior lights system
Led dimming
Left turn
Low coolant
Low coolant level indicator module (under center of i/p)
Low coolant level sensor (in coolant reservoir)
Oil press
Oil pressure switch & sender (left rear side of engine)
Parity prndl
Pnk
Prndl
Prndl a
Prndl b
Prndl c
Right turn
Safety belt
Service engine soon
Service throttle soon
Solid state
Speed- ometer
Starting/charging system
System engine controls system
Tach
Tan
Temp gauge
Transmission range selector (left side of transmission)
Up- shift
Volt- meter
Wait to start
Warning system
Water in fuel
Water-in fuel sensor

6.5L (VIN F), Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 6.5L (VIN F), Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500:

(near park brake switch) diode
A/t
Accy
Anti-lock brakes system
Balance fuel gage sender (in rear fuel tank)
Brake ind in
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch (on rear of brake pressure modulator valve body)
Bulb test
Daytime running lamps module (left side of i/p)
Diode 1
Eng 1 mini fuse 20a
Engine controls system
Engine controls system (fuel pump balance relay)
Fuel gage sender
Fuel pump & sender
Fuel pump balance module (inside left side of frame rail near trans. crossmember)
G117 (top rear of right cylinder head)
Gauges fuse 4 10a
Hot in run, bulb test or start
I/p fuse block (behind left side of i/p)
Ign e mini fuse 10a
Ignition switch
Lock
M/t
Nca
Off
Park brake warning switch (left side of i/p)
Pnk
Radio
Run
Start
Trans fuse 20 10a
Transmission system
Twisted pair
Underhood fuse-relay center (left rear of engine compt)
Vehicle speed sensor (left rear of transmission)
Vehicle speed sensor buffer (behind right side of i/p)
W/ dual fuel tanks
W/o dual fuel tanks

6.5L (VIN S), Instrument Cluster Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 6.5L (VIN S), Instrument Cluster Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500:

(6 bulbs)
Air bag
Anti- lock brakes
Anti-lock brakes system
Bat
Brake
Check gauges
Check gauges lamp driver
Daytime running lamps
Engine controls system
Engine coolant temperature sender (left side of engine block)
Exterior lights system
Fuel gauge
G117 (top rear of right cylinder head)
G202 (left side of i/p)
Generator
Gnd
Headlights system
Hi beam
Ign
Illum
Illumination
Instrument cluster
Interior lights system
Led dimming
Left turn
Low coolant
Low coolant level indicator module (under center of i/p)
Low coolant level sensor (in coolant reservoir)
Oil press
Oil pressure switch & sender (left rear side of engine)
Parity prndl
Pnk
Prndl
Prndl a
Prndl b
Prndl c
Right turn
Safety belt
Service engine soon
Service throttle soon
Solid state
Speed- ometer
Starting/charging system
System engine controls system
Tach
Tan
Temp gauge
Transmission range selector (left side of transmission)
Up- shift
Volt- meter
Wait to start
Warning system
Water in fuel
Water-in fuel sensor

6.5L (VIN S), Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for 6.5L (VIN S), Instrument Cluster Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500:

(near park brake switch) diode
A/t
Accy
Anti-lock brakes system
Balance fuel gage sender (in rear fuel tank)
Brake ind in
Brake pressure modulator valve (left front wheelhouse)
Brake pressure warning switch (on rear of brake pressure modulator valve body)
Bulb test
Daytime running lamps module (left side of i/p)
Diode 1
Eng 1 mini fuse 20a
Engine controls system
Engine controls system (fuel pump balance relay)
Fuel gage sender
Fuel pump & sender
Fuel pump balance module (inside left side of frame rail near trans. crossmember)
G117 (top rear of right cylinder head)
Gauges fuse 4 10a
Hot in run, bulb test or start
I/p fuse block (behind left side of i/p)
Ign e mini fuse 10a
Ignition switch
Lock
M/t
Nca
Off
Park brake warning switch (left side of i/p)
Pnk
Radio
Run
Start
Trans fuse 20 10a
Transmission system
Twisted pair
Underhood fuse-relay center (left rear of engine compt)
Vehicle speed sensor (left rear of transmission)
Vehicle speed sensor buffer (behind right side of i/p)
W/ dual fuel tanks
W/o dual fuel tanks

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Courtesy Lamps Wiring Diagram for GMC Cab & Chassis C1996 3500:

(not used)
Bat
C210
C219
C220
Cargo lamp
Conven- ience center (left side of i/p)
Convenience center (left side of i/p)
Courtesy lamps
Ctrl
Ctsy fuse 3 20a
Dome defeat
Dome lamp defeat
Door jamb
Front dome lamp
G119 (gasoline) (right front of engine block
G120 (diesel) (top of right cylinder head)
G202 (left side of i/p)
Gages fuse 4 10a
Gnd
Headlamp & panel dimmer switch
Horn mini fuse 20a
Hot at all times
Hot in run, bulb test or start
I/p compartment box lamp
I/p fuse block
Ign sw
Illuminated entry module (under center of i/p)
Lamp out
Left front door jamb switch
Left i/p courtesy lamp
Left illuminated vanity mirror
Mirrors system
Pnk
Pnk a
Pnk b
Remote keyless entry module (under center of i/p)
Right front door jamb switch
Right i/p courtesy lamp
Right illuminated vanity mirror
Underhood fuse-relay center
Underhood lamp
Underhood reel lamp
W/ rke
W/o rke

Instrument Illumination Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for GMC Cab & Chassis C1996 3500:

(6) bulbs
(at right "d" pillar)
(left side of i/p)
Audio alarm module (left side of i/p)
C210
Cargo lamp switch
Convenience center (left side of i/p)
Display dim sig
Fog lamp switch
Front auxiliary a/c-heater control module
G202
G998
Headlamp & panel dimmer switch
Heater & a/c control
Hot at all times
I/p fuse block
I/p fuse block (left side of i/p)
Illum fuse 14 10a
Instrument cluster
Off
Parade mode sw
Park
Park lps fuse 9 20a
Radio
Rear auxiliary a/c-heater control module
Rear auxiliary heater & a/c fan switch
Rear liftgate release switch
Rear window wiper/ washer switch
Rheo- stat
Suburban & utility only
Transfer case mode selector
Transfer case select switch

Instrument Illumination Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for GMC Cab & Chassis C1996 3500:

(left side of i/p)
Ash tray lamp
C210
Convenience center (left side of i/p)
Exterior lights system
G202
Headlamp & panel dimmer switch
Hot at all times
I/p fuse block
Left front power window switch
Left rear power window switch
Off
Parade mode sw
Park
Park lps fuse 9 20a
Rear window lockout switch
Remote outside rearview mirror switch
Rheo- stat
Right front power window switch
Right rear power window switch

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Power Distribution Wiring Diagram (1 of 4) for GMC Cab & Chassis C1996 3500:

(5.7l)
(diesel)
(except 5.7l)
(gasoline)
(stud a)
(stud b)
A/c comp mini fuse 20a
A/c maxi fuse 3 50a
A/c relay
Aux fan relay mini fuse 20a
Auxiliary cooling fan relay
Blower relay
Brake lamp relay
Brake pressure modulator valve
C13
C205
C219
Cargo lamp switch (pick-up only)
Convenience center
Ctsy fuse 3 20a
D13
Daytime running lamps relay
Diode
Drl/fog fuse 15 20a
Ecm-b mini fuse 20a
Fog lamp relay
Front dome reading lamps
Fuel pump oil pressure switch and sender
Fuel pump relay
Generator
Glove box lamp
Headlamp and panel dimmer switch
Heater and a/c control
High blower relay
Horn mini fuse 20a
Horn relay
I/p fuse block
Illuminated entry module
Left battery
Left courtesy lamp
Left front door courtesy lamp
Left illuminated vanity mirror
Left rear door courtesy lamp
Low blower relay
Maxi fuse 2 30a
Maxi fuse 30a
Maxi fuse 4 60a
Maxi fuse 8 50a
Medium blower relay
Pk lps fuse 9 20a
Powertrain control module (diesel)
Rear dome reading lamps
Red
Relay center
Remote outside rearview mirror switch
Right battery (diesel)
Right courtesy lamp
Right front door courtesy lamp
Right illuminated vanity mirror
Right rear door courtesy lamp
Rr defog mini fuse 20a
Spare power source
Starter motor (diesel)
Starter motor (gasoline)
To fusible link
To under- hood fuse- relay center
Underhood fuse-
Underhood fuse-relay center
Underhood lamp
Underhood reel lamp
Vehicle control module (gasoline)

Power Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for Power Distribution Wiring Diagram (2 of 4) for GMC Cab & Chassis C1996 3500:

A/t
Acc
Audio alarm module
Aux/pwr fuse 7 25a
Auxiliary power connector
B10
C210
Cig ltr fuse 13 20a
Cigar lighter
Clutch start switch
Convenience center
Crank fuse 8 10a
D14
D15
Data link connector
Diagnostic energy reserve module
Door lock relay
Except crew cab and diesel pickup
From underhood a fuse-relay center
G202 (left side of i/p)
I/p fuse block
Ignition switch
Instrument cluster
Left front door lock switch
Left front power lumbar seat switch
Left power seat
Lock
M/t
Maxi fuse 5 50a
Maxi fuse 6 40a
Maxi fuse 7 50a
Nca
Off
Park/ neutral position switch
Pickup
Pnk
Power amplifier relay
Power wdo circuit breaker 30a
Power window master switch
Pwr-accy circuit breaker 20a
Radio
Radio batt fuse 19 10a
Radio fuse 17 10a
Rear liftgate relaease switch
Rear window lockout switch (4-dr)
Rear window wiper/washer switch (suburban/utility)
Red
Remote keyless entry module
Remote keyless entry module (utility)
Right front door lock switch
Right front power lumbar seat switch
Right front power window switch (2 dr & utility)
Rr wiper fuse 23 25a
Run
Start
Starter relay
Stop/haz fuse 1 20a
Suburban only
Suburban/ utility
T case fuse 2 20a
Tcc/stoplamp switch
To i/p fuse block
To underhood fuse-relay center
Trans fuse 20 10a
Trans- mission
Transfer case control module
Turn/ hazard switch
Underhood fuse-relay center
W/o power windows
Windshield wiper motor module
Windshield wiper/ washer switch
Wiper fuse 11 25a

Power Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis C1996 3500

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List of elements for Power Distribution Wiring Diagram (3 of 4) for GMC Cab & Chassis C1996 3500:

(a/t)
(m/t)
4.3l
5.0l, 5.7l
6.5l
7.4l
A/c relay
A10
Air bag fuse 10 10a
Air injection reaction relay
Arming sensor
Audio alarm module
Aux cooling fan relay
Backup lamp switch
C11
C12
C218
Camshaft position sensor
Convenience center
Crank- shaft position sensor
Daytime running lamps module
Daytime running lamps relay
Diagnostic energy reserve module
Diesel
Diesel only
Ecm 1 mini fuse 20a
Egr boost pulse width modulation solenoid valve
Egr valve solenoid
Electro- chromatic mirror w/ compass
Electronic injection pump
Eng-1 mini fuse 20a
Evaporative emissions canister purge solenoid
Except 7.4l
From ignition switch
Fuel heater
Fuel injector
Fuel pump balance module
Fuel pump balance relay
Fuel sol mini fuse 20a
Gasoline
Gauges fuse 4 10a
Glow plug relay
Headlamp/ panel dimmer switch
Heated oxygen sensor 1
Heated oxygen sensor 2
Heated oxygen sensor 3
Heated oxygen sensor 4
I/p cluster
I/p fuse block
Ign e mini fuse 10a
Ignition coil
Ignition coil driver
Illuminated entry module
Linear egr pulse width modulation solenoid valve
Linear egr solenoid
Low coolant level indicator module (diesel)
M/t only
Mass airflow sensor
Nca
Nca
Pnk
Powertrain control module
Remote keyless entry module
Transfer case control module
Transfer case select switch
Turn b/u fuse 16 20a
Turn signal switch
Underhood fuse-relay center
Vehicle control module
Vehicle speed sensor buffer (diesel)
Water-in- fuel sensor

Power Distribution Wiring Diagram (4 of 4) for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for Power Distribution Wiring Diagram (4 of 4) for GMC Cab & Chassis C1996 3500:

(headlamp and panel lamp dimmer)
4wd fuse 24 25a
A13
Auxiliary battery
Auxiliary battery relay (left rear of engine compt)
Auxiliary heater and a/c control logic module
Auxiliary heater and a/c control module (front)
Auxiliary heater and a/c control module (rear)
Brake fuse 18 10a
Brake pressure modulator valve
C205
Convenience center
Cruise control module
Cruise control switch
Cruise fuse 6 10a
Except suburban & diesel
From ignition switch
From underhood fuse-relay center
Front temperature door motor
Fusible link
G100 (left front fender)
G202 (behind left side of i/p)
Heater and a/c control
Heater and a/c control switch
Htr-a/c fuse 12 25a
I/p fuse block
Illum fuse 14 10a
Interior lights system
Mode door motor
Rear auxiliary mode door motor
Rear auxiliary temperature door motor
Rear high blower relay
Rear low blower relay
Rear medium blower relay
Recirculation door motor
Rr hvac fuse 5 10a
Spare power source
Suburban & diesel
Tcc/ stoplamp switch
Transfer case select switch

POWER DOOR LOCKS

Door Lock Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Door Lock Wiring Diagram for GMC Cab & Chassis C1996 3500:

(w/ pwr wdo) (w/o pwr wdo)
A a
B e
C d
Convenience center (under left side of i/p)
E h
Fuse block (lower left side of i/p)
G202 (below left side of i/p)
Hot at all times
Left front door lock actuator
Left front door lock switch
Lock
Pwr acc circuit breaker 20a
Right front door lock actuator
Right front door lock switch
Solid state
Tan
Unlock

Keyless Entry Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Keyless Entry Wiring Diagram for GMC Cab & Chassis C1996 3500:

1995 vftc c
Battery
Cargo door contact switch
Cig ltr fuse 14 20a
Convenience center
Data link connector (under left side of i/p)
Door jamb switch in
Door lock relay (under center portion of i/p, near rke module)
G202 (behind left side of i/p)
Gauges fuse 4 10a
Ground
Hot at all times
Hot in run, bulb test or start
I/p fuse block (lower left side of i/p)
Ignition
Int lts input
Interior lights system
Keyless entry module (behind center of i/p)
L fnt dr unlk output
Left front door lock motor
Left front door lock switch
Liftgate release motor
Liftgate/cargo rel
Lock
Lock doors output
Or 540
Or 56
Pnk
Program enable
Pwr accy circuit breaker a 30a
Rear cargo door lock motor (utility only)
Right front door lock motor
Right front door lock switch
Tan
Unlk doors output
Unlock
Unlock signal
Utility w/ cargo doors
Utility w/ liftgate

POWER MIRRORS

Power Mirror Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Power Mirror Wiring Diagram for GMC Cab & Chassis C1996 3500:

Convenience center (behind left side of i/p)
Ctsy fuse 3 20a
Down
G202 (behind left side of i/p)
Hot at all times
I/p fuse block
Illum- nation lamp
Interior lights system
Left
Left outside power rearview mirror
Left/ right motor
Outside power rearview mirror switch
Red
Right
Right outside power rearview mirror
Up/ down motor

POWER SEATS

6-Way Power Seat Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 6-Way Power Seat Wiring Diagram for GMC Cab & Chassis C1996 3500:

(behind left side of i/p)
Back
C210
Convenience center (under left side of i/p)
Down
Entire seat
For- ward
Forward/ rearward motor
Front height
Front tilt motor
G202
Hot at all times
I/p fuse block
Power seat switch
Pwr accy circuit breaker 30a
Rear height
Rear tilt motor
Tan

Lumbar Wiring Diagram for GMC Cab & Chassis C1996 3500

Ottieni l'accesso a tutti gli schemi elettrici dell'auto

List of elements for Lumbar Wiring Diagram for GMC Cab & Chassis C1996 3500:

A nca
A nca a nca
B nca a nca
C210 b
Cig ltr fuse 13 20a
Convenience center (under left side of i/p)
G202 (behind left side of i/p)
Hot at all times
I/p fuse block
Left power lumbar support switch
Nca
Nca b
Pump
Right power lumbar support switch
W/ bench seat
W/ bucket and split bench seat

POWER WINDOWS

Power Window Wiring Diagram, 2 Door for GMC Cab & Chassis C1996 3500

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List of elements for Power Window Wiring Diagram, 2 Door for GMC Cab & Chassis C1996 3500:

Convenience center (under left side of i/p)
Down
G202 (below left side of i/p)
Hot in run
I/p fuse block (lower left side of i/p)
Interior lights system
Left front
Left front window motor
Left power window master switch
Pwr window circuit breaker 30a
Right front
Right front window motor
Right front window switch
Solid state
Tan

Power Window Wiring Diagram, 4 Door for GMC Cab & Chassis C1996 3500

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List of elements for Power Window Wiring Diagram, 4 Door for GMC Cab & Chassis C1996 3500:

Convenience center (under left side of i/p)
Down
Fuse block (lower left side of i/p)
G202 (below left side of i/p)
Headlamp and panel dimmer switch
Hot at all times
Hot in run
Left front
Left front power window master switch
Left front window motor
Left rear
Left rear window motor
Left rear window switch
Pk lps fuse 20a
Power window circuit breaker 30a
Right front
Right front window motor
Right front window switch
Right rear
Right rear window motor
Right rear window switch
Solid state
Tan
Window lockout switch

RADIO

Radio Wiring Diagrams, with Amplifier for GMC Cab & Chassis C1996 3500

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List of elements for Radio Wiring Diagrams, with Amplifier for GMC Cab & Chassis C1996 3500:

(left side of dash) data link connector
(lf door harn, near window reg breakout)
(rf door harn, near door lock motor breakout)
Amp feed
Antenna
Audio rtn
Bare
Battery
Cig ltr fuse 13 20a
Diesel
Dim
Dim feed
Display dim
Drain rtn
E&c diag
Fuse out
G201 (right side of dash)
G202 (left side of dash)
Gas
Ground
Hot at all times
Hot in acc or run
I/p fuse block
Interior lights system
Left front speaker
Left front tweeter
Left rear door speaker
Left rear speaker
Lf +
Lf -
Lr +
Lr dr +
Lr dr -
Lr _
Lr+
Lr-
Lt audio
Lt remote
Nca
Pnk
Power amplifier (under left side of dash)
Power amplifier relay (under left side of dash)
Radio
Radio batt fuse 19 10a
Radio fuse 17 10a
Red
Remote audio player
Remote rtn
Rf +
Rf -
Right front speaker
Right front tweeter
Right rear door speaker
Right rear speaker
Rly sig
Rr +
Rr -
Rr dr +
Rr dr -
Rr+
Rr-
Rt audio
Rt remote
S221
S249
S250
S251
S252
S254
S256
S259
S298
S504
S505
S603
S604
Serial data
Tan
Tape ctrl
Vehicle control module (left side of engine compartment)
Vehicle speed sensor buffer (behind right side of dash)
Vss signal

Radio Wiring Diagrams, without Amplifier for GMC Cab & Chassis C1996 3500

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List of elements for Radio Wiring Diagrams, without Amplifier for GMC Cab & Chassis C1996 3500:

(left side of dash) data link connector
(lf door harn, near window reg breakout)
(rf door harn, near door lock motor breakout)
Amp feed
Antenna
Audio rtn
Bare
Battery
Diesel
Dim
Dim feed
Display dim
Drain rtn
E&c diag
Fuse out
G202 (left side of dash)
Gas
Ground
Hot at all times
Hot in acc or run
I/p fuse block
Interior lights system
Left front speaker
Left front tweeter
Left rear speaker
Lf +
Lf -
Lr +
Lr _
Lt audio
Lt remote
Nca
Pnk
Radio
Radio batt fuse 19 10a
Radio fuse 17 10a
Remote audio player
Remote rtn
Rf +
Rf -
Right front speaker
Right front tweeter
Right rear speaker
Rr +
Rr -
Rt audio
Rt remote
S221
S298
S504
S505
S603
S604
Serial data
Tan
Tape ctrl
Vehicle control module (left side of engine compartment)
Vehicle speed sensor buffer (behind right side of dash)
Vss signal

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Shift Interlock Wiring Diagram for GMC Cab & Chassis C1996 3500:

(behind left side of i/p, below fuse block)
Brake transmission shift interlock solenoid (right side of steering column)
Fuse block
G200
Hot in run or start
Park/ neutral position switch (left side of transmission)
Pnk
Stop lamp switch (top of brake pedal)
Transfer case control module (below i/p on steering column support bracket)
Turn/ hazard switch
Turn/bu fuse 16 20a

STARTING/CHARGING

Charging Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Charging Wiring Diagram for GMC Cab & Chassis C1996 3500:

(diesel)
(gas)
(not used)
(not used) s
(on engine)
(right front of engine-gas, left front of intake manifold-diesel)
(right front wheel- house, near battery)
Charge indicator
Diesel only
G111
G119 (gas) g131 (diesel)
G133
Gauges fuse 4 10a
Generator
Hot in run, bulb test or start
I/p fuse block
Instrument cluster
Left battery
Nca
Pnk
Power distribution system
Red
Right battery (diesel)
Starter solenoid
Tach

Starting Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Starting Wiring Diagram for GMC Cab & Chassis C1996 3500:

(on engine)
(right front of engine-gas, left front of intake manifold-diesel)
(right front of engine-gas, rear of right cylinder head-diesel)
(right front wheel- house, near battery)
A/t
Accy
Battery stud
Bulb test
Clutch start switch (top of clutch pedal)
Diesel
G111
G119 (gas) g117 (diesel)
G119 (gas) g131 (diesel)
G133
Gas
Hold- in coil
Ignition switch
Left battery
Lock
M/t
Maxi fuse 6 40a
Nca
Off
Park/ neutral position switch (left side of transmission)
Power distribution system
Pull- in coil
Red
Right battery (diesel)
Run
Start
Starter motor
Starter relay
Starter solenoid
Underhood fuse-relay center

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Supplemental Restraint Wiring Diagram for GMC Cab & Chassis C1996 3500:

A10
A11
A12
Air bag fuse 10 10a
Air bag warning lamp
Arming sensor (left frame rail, below driver's door)
Audio alarm module (convenience center)
B10
B11
B12
Crank fuse 8 10a
Crank input
Data link connector (behind left side of i/p)
Diagnostic energy reserve module (derm) (behind center of instrument panel)
Diagnostic requst in
Driver 36 vlr
Driver sense high
Driver sense low
Driver source sense
G125 (front of engine)
G202 (left side of i/p)
Gauges fuse 4 10a
Ground
Hot in run, bulb test or start
Hot in start
I/p fuse block
Ignition
Instrument cluster
J/b c210 (convenience center)
Left discriminating sensor (left frame rail)
Nca
Pnk
Redundant indic, ign
Right discriminating sensor (right frame rail)
Seat belt monitor
Seat belt switch
Shorting bar
Sir coil assembly (top of steering column)
Sir indic low
Steering wheel inflator module (mounted on steering wheel)
Tan

TRANSMISSION

5.0L

5.0L (VIN M), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C1996 3500

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List of elements for 5.0L (VIN M), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C1996 3500:

(2wd only)
(4wd only)
(left side of transmission-2wd) (left side of transfer case-4wd)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
3-2 ctrl solenoid
3-2 downshift sol
4wd low signal in
5v reference
Automatic transmission (4l60-e)
Battery in
Brake fuse 18 10a
Brake switch input
Dash fuse block
Data class ii
Data link connector (under left side of dash)
Ecm 1 fuse 20a
Ecm b fuse 20a
Ect sens input
Electronic brake control module
Eng 1 fuse 20a
Engine coolant temp sensor (top right front of engine)
Front wheel lock
Fuel injectors, ignition control moudule & ignition coil
Fuel pump & oil press switch/ sender & fuel pump relay
G120 (top of right cylinder head)
Gauges fuse 4 10a
Hot at all times
Hot in off, run or start
Hot in run
Hot in run or start
Ignition in
Instrument cluster
Maf sensor & heated oxygen sensors
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl solenoid
Range signal "a"
Range signal "b"
Range signal "c"
Red
S101
S103
S108
S150 (engine harn, 13 cm from bpmv break-out)
S151
S161
S213
S231 (engine harness, near map or egr break-out)
Sensor ground
Sensor return
Solenoid
Stoplamp switch (on brake pedal bracket)
Tan
Tcc
Tcc pwm
Tcc pwm sol
Tcc sol
Throttle position sensor (mounted to side of throttle body)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure switch assembly
Trans range switches
Trans temp sig in
Transfer case & axle switches (4wd only)
Transfer case circuit
Underhood fuse/relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor
Vehicle speed sensor adaptor (4wd only)
Vss hi
Vss lo

5.7L

5.7L (VIN R), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Transmission Wiring Diagram, 4L60-E for GMC Cab & Chassis C1996 3500:

(2wd only)
(4wd only)
(left side of transmission-2wd) (left side of transfer case-4wd)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
3-2 ctrl solenoid
3-2 downshift sol
4wd low signal in
5v reference
Automatic transmission (4l60-e)
Battery in
Brake fuse 18 10a
Brake switch input
Dash fuse block
Data class ii
Data link connector (under left side of dash)
Ecm 1 fuse 20a
Ecm b fuse 20a
Ect sens input
Electronic brake control module
Eng 1 fuse 20a
Engine coolant temp sensor (top right front of engine)
Front wheel lock
Fuel injectors, ignition control moudule & ignition coil
Fuel pump & oil press switch/ sender & fuel pump relay
G120 (top of right cylinder head)
Gauges fuse 4 10a
Hot at all times
Hot in off, run or start
Hot in run
Hot in run or start
Ignition in
Instrument cluster
Maf sensor & heated oxygen sensors
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl solenoid
Range signal "a"
Range signal "b"
Range signal "c"
Red
S101
S103
S108
S150 (engine harn, 13 cm from bpmv break-out)
S151
S161
S213
S231 (engine harness, near map or egr break-out)
Sensor ground
Sensor return
Solenoid
Stoplamp switch (on brake pedal bracket)
Tan
Tcc
Tcc pwm
Tcc pwm sol
Tcc sol
Throttle position sensor (mounted to side of throttle body)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure switch assembly
Trans range switches
Trans temp sig in
Transfer case & axle switches (4wd only)
Transfer case circuit
Underhood fuse/relay center
Vehicle control module (left side of engine compt)
Vehicle speed sensor
Vehicle speed sensor adaptor (4wd only)
Vss hi
Vss lo

5.7L (VIN R), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C1996 3500

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List of elements for 5.7L (VIN R), Transmission Wiring Diagram, 4L80-E for GMC Cab & Chassis C1996 3500:

(2wd only)
(4wd only)
(5.7l) (7.4l)
(engine harn, 13 cm from bpmv break-out)
(left rear side of transmission-2wd) (left side of transfer case-4wd)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
4wd low signal in
5v reference
A/t iss hi in
A/t iss lo in
Automatic transmission (4l80-e)
Automatic transmission input shaft speed sensor (on transmission)
Battery in
Brake fuse 18 10a
Brake switch assembly (on brake pedal bracket)
Brake switch input
Data class ii
Data link connector (under left side of dash)
Ecm 1 fuse 20a
Ecm b fuse 20a
Ect sens input
Electronic brake control module
Eng 1 fuse 20a
Engine coolant temp sensor (top right front of engine)
Front wheel lock
Fuel injectors, ignition control moudule & ignition coil
Fuel pump & oil press switch/ sender & fuel pump relay
G120 (top of right cylinder head)
Gauges fuse 4 10a
Headlamp & panel dimmer switch
Hot at all times
Hot in run
Hot in run or start
Hot in run, bulb test or start
I/p fuse block
Ignition in
Instrument cluster
Maf sensor & heated oxygen sensors
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Press ctrl
Range signal "a"
Range signal "b"
Range signal "c"
Red
S101
S103
S108
S150
S151
S161 s104
S213
S231 (engine harness, near map or egr breakout)
Sensor ground
Sensor return
Solenoid
Tan
Tcc pwm
Tcc pwm sol
Throttle position sensor (mounted to side of throttle body)
Tp sens input
Trans fluid temp sensor
Trans fuse 20 10a
Trans range pressure switch assembly
Trans range switches
Trans temp sig in
Transfer case & axle switches
Underhood fuse/relay center
Vehicle control module (vcm) (left side of engine compt)
Vehicle speed sensor
Vehicle speed sensor adaptor (4wd only)
Vss hi
Vss lo

6.5L

6.5L (VIN F), Transmission Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN F), Transmission Wiring Diagram for GMC Cab & Chassis C1996 3500:

(2wd only)
(4wd only)
(i/p harn, 4 cm from engine harn break-out)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
4wd low signal in
A/t iss sens hi in
A/t iss sens in
A/t iss sens lo in
A/t iss sensor out
A12
Accelerator pedal position module (part of accelerator pedal)
App 1 5v ref
App 1 signal in
App 2 5v ref
App 2 signal in
App 3 5v ref
App 3 signal in
Automatic transmission
Automatic transmission input shaft speed sensor (left front of transmission)
B10
B12
Battery in
Brake fuse 18 10a
Brake switch assembly (on brake pedal bracket)
Brake switch in
C11
C12
C13
C14
C15
Class ii data
D11
D12
D13
Data link connector (under left side of dash)
Ecm 1 fuse 20a
Ecm b fuse 20a
Ect sensor in
Engine coolant temp sensor (near thermostat housing)
Front wheel lock
Fuel pump & oil press switch/ sender & fuel pump relay
G120 (right top of cylinder head)
Gauges fuse 4 10a
Ground
Hot at all times
Hot in run
Hot in run or start
Hot in run, bulb test or start
I/p fuse block
Ignition in
Instrument cluster
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Power
Powertrain control module (right side of dash near blower motor)
Press ctrl
Red
S101
S103
S140 (engine sensor harness)
S150 (engine harness, 13 cm from bpmv harness break-out)
S152 (engine harn, 4 cm from i/p break-out)
S211
S213
S220 (i/p harn, 12 cm from brake switch connector)
S299
Sensor ground
Solenoid
Stop/haz fuse 1 20a
Stoplamp switch in
Tan
Tcc pwm
Tcc pwm sol
Tft sensor in
Trans fluid temp sensor
Trans fuse 20 10a
Trans range "a"
Trans range "b"
Trans range "c"
Trans range pressure switch assembly
Trans range switches
Transfer case & axle switches
Transfer case circuit
Turn/ hazard switch & chime module
Underhood fuse/relay center
Vehicle speed sensor (on transmission-2wd) (on transfer case-4wd)
Vehicle speed sensor (vss) adaptor (4wd only)
Vehicle speed sensor buffer (right side of dash)
Vss hi in
Vss in
Vss lo in
Vss out

6.5L (VIN S), Transmission Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for 6.5L (VIN S), Transmission Wiring Diagram for GMC Cab & Chassis C1996 3500:

(2wd only)
(4wd only)
(i/p harn, 4 cm from engine harn break-out)
1-2 shift sol
1-2 shift solenoid
2-3 shift sol
2-3 shift solenoid
4wd low signal in
A/t iss sens hi in
A/t iss sens in
A/t iss sens lo in
A/t iss sensor out
A12
Accelerator pedal position module (part of accelerator pedal)
App 1 5v ref
App 1 signal in
App 2 5v ref
App 2 signal in
App 3 5v ref
App 3 signal in
Automatic transmission
Automatic transmission input shaft speed sensor (left front of transmission)
B10
B12
Battery in
Brake fuse 18 10a
Brake switch assembly (on brake pedal bracket)
Brake switch in
C11
C12
C13
C14
C15
Class ii data
D11
D12
D13
Data link connector (under left side of dash)
Ecm 1 fuse 20a
Ecm b fuse 20a
Ect sensor in
Engine coolant temp sensor (near thermostat housing)
Front wheel lock
Fuel pump & oil press switch/ sender & fuel pump relay
G120 (right top of cylinder head)
Gauges fuse 4 10a
Ground
Hot at all times
Hot in run
Hot in run or start
Hot in run, bulb test or start
I/p fuse block
Ignition in
Instrument cluster
Malfunction indicator lamp
Mil control
Pcm ground
Pcs sol hi out
Pcs sol lo out
Pnk
Power
Powertrain control module (right side of dash near blower motor)
Press ctrl
Red
S101
S103
S140 (engine sensor harness)
S150 (engine harness, 13 cm from bpmv harness break-out)
S152 (engine harn, 4 cm from i/p break-out)
S211
S213
S220 (i/p harn, 12 cm from brake switch connector)
S299
Sensor ground
Solenoid
Stop/haz fuse 1 20a
Stoplamp switch in
Tan
Tcc pwm
Tcc pwm sol
Tft sensor in
Trans fluid temp sensor
Trans fuse 20 10a
Trans range "a"
Trans range "b"
Trans range "c"
Trans range pressure switch assembly
Trans range switches
Transfer case & axle switches
Transfer case circuit
Turn/ hazard switch & chime module
Underhood fuse/relay center
Vehicle speed sensor (on transmission-2wd) (on transfer case-4wd)
Vehicle speed sensor (vss) adaptor (4wd only)
Vehicle speed sensor buffer (right side of dash)
Vss hi in
Vss in
Vss lo in
Vss out

WARNING SYSTEMS

Warning System Wiring Diagrams for GMC Cab & Chassis C1996 3500

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List of elements for Warning System Wiring Diagrams for GMC Cab & Chassis C1996 3500:

Audio alarm module (in convenience center)
Battery input
C210
Convenience center (under left side of i/p)
Fasten belts indicator
Fasten belts out
Fuse block
G202 (behind left side of i/p, below fuse block)
Gages fuse 4 10a
Ground
Hot at all times
Hot in park or head
Hot in run or start
Ign on input
Illum fuse 14 10a
Instrument cluster
Key-in warning
Key-in warning buzzer switch (in left side of steering column)
Left door jamb switch
Lights on input
Pnk
Seat belt input
Seat belt switch (in driver's safety belt buckle)
Stop/haz fuse 1 20a
Tan

WIPER/WASHER

Front Wiper/Washer Wiring Diagram for GMC Cab & Chassis C1996 3500

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List of elements for Front Wiper/Washer Wiring Diagram for GMC Cab & Chassis C1996 3500:

Front windshield washer pump motor
G108 (left radiator support)
G202 (behind left side of dash)
Hot in accy or run
I/p fuse block (under left side of dash)
Inst wipe
Low
Mist
Nca
Off
Pulse
Red
S158
S204
Solid state
Wash
Washer switch
Windshield wiper motor module (on firewall, behind wiper motor)
Windshield wiper/ washer switch
Wiper fuse 11 25a
Wiper switch