ENGINE PERFORMANCE – Chevrolet Pickup C3500 1996 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996:

• 1-2 shift sol. ctrl
• 2-3 shift sol. ctrl
• 3-2 ctrl sol. ctrl
• A/c comp rly ctrl
• A/c compressor clutch relay
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position sensor (in distributor)
• Coil
• Crank posit sens rtn
• Crank posit sens sig
• Crankshaft position sensor (lower right front portion of engine block, near crankshaft)
• Ect sens input
• Egr posit input
• Evap sol purge ctrl
• Evaporative emissions (evap) canister purge solenoid valve (right side of engine)
• G120 (right front of engine block)
• Hall effect sensor
• Heated oxygen sensor no.1 (in exhaust pipe, near catalytic converter)
• Heated oxygen sensor no.2 (in exhaust pipe, near catalytic converter)
• Heated oxygen sensor no.3 (in exhaust pipe, near catalytic converter)
• Iat sens sig
• Idle air control (iac) valve motor (attached to right rear of throttle body)
• Idle air ctrl (iac) a hi
• Idle air ctrl (iac) b lo
• Ign feed
• Inj no.1 ctrl
• Inj no.2 ctrl
• Inj no.3 ctrl
• Inj no.4 ctrl
• Inj no.5 ctrl
• Inj no.6 ctrl
• Knock sens sig
• Knock sensor (left side of engine block, below exhaust manifold, forward of starter)
• Left sens hi
• Left sens lo
• Map sens input
• Mass air flow sens sig
• Nca
• Pnk
• Post-catalyst sens hi
• Post-catalyst sens lo
• Power
• Pre-catalyst sens hi
• Pre-catalyst sens lo
• Right sens hi
• Right sens lo
• Sens rtn
• Sens sig
• Sensor ground
• Tan
• Tcc on/off sol. ctrl
• Tcc pwm sol ctrl
• Throttle posit sens
• Trans temp sens sig
• Underhood fuse-relay center (left rear of engine compartment, on fender)
• Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
• Vehicle spd sense sig
• Vehicle speed sensor (left rear side of transmission) (if equipped w/4wd) (left side of transfer case)
• Vss rtn
• Vss signal

4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Pickup C3500 1996

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Pickup C3500 1996:

• 1-2 shift sol.
• 2-3 shift sol.
• 3-2 control sol.
• Automatic transmission
• Ecm-1 fuse 20a
• Eng 1 fuse 20a
• 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
• Heated oxygen sensor no.4 (in exhaust pipe, near catalytic converter)
• Hot in run & start
• Linear egr valve solenoid (left top rear of engine, above valve cover)
• Nca
• Note: fuel injectors are located in central sfi, center of intake manifold
• Pnk
• Pnk pnk
• Red
• Tan
• Tcc on/off sol.
• Tcc pwm sol.
• Transmission fluid temperature (tft) sensor (internal)
• Under hood fuse-relay center

4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Pickup C3500 1996

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Pickup C3500 1996:

• (inside left frame rail, near rear crossmember) g415
• (right front of engine, near thermostat housing) g119
• (right top of cylinder head) g120
• 5v ref
• 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 emissions purge solenoid vacuum switch (top 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 & sender (top center rear of engine, behind distributor)
• Gauges fuse 4 10a
• Headlamp & panel dimmer switch
• Hot in run or start
• Hot in run, or start
• I/p fuse block
• If equipped
• Ign e f1
• Ignition
• Input fuel gauge
• Input oil gauge
• Input tachometer
• Instrument cluster
• Intake manifold air temp sensor (in air intake duct)
• M/t only
• Manifold absolute pressure (map) sensor (top right center of engine, near fuel injectors)
• Map
• Mass air flow sensor (maf)
• Mini fuse 10a
• Output to gage
• Pnk
• Pnk a
• Primary tank fuel level signal
• Red
• Ref lo
• Relay ctrl
• Service engine soon indicator
• Speedometer input
• Tan
• Tan a
• Temp
• Throttle position (tp) sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse-relay block
• Upshift lamp
• W/dual fuel tanks
• W/o dual fuel tanks

4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Pickup C3500 1996

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Pickup C3500 1996:

• (right front of engine near thermostat housing) g119
• 12v battery fused
• 20a
• 4wd input
• 5v ref. voltage
• 5v return
• A pnk
• A/c request signal
• A/t
• A/t only
• Brake pressure modulator valve (bpmv) (near brake master cylinder, at left front wheelhouse)
• Brake sw input
• Brake switch input
• Check eng lp ind out
• 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
• Cylinder no.1
• Cylinder no.2
• Cylinder no.3
• Cylinder no.4
• Cylinder no.5
• Cylinder no.6
• Data link connector (under left side of i/p)
• Distributor (top of engine, at rear, near bulkhead)
• Ecm b f11
• Est output sig
• Four whl dr sig lo
• Four whl dr tt feed
• Fuel a pump prime connector
• Fuel pump relay
• Fuel pump rly ctrl
• Fused output
• G120 (right top of cylinder head)
• Ground
• High voltage coil wire
• Hot in run
• Hot in run or start
• I/p fuse block
• Ign input
• Ign timing sig.
• 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
• Power
• Press ctrl sol lo
• Press ctrl sol. hi
• Radio
• Red
• Serial data sig
• Service circuit power
• Shift ind lp out
• Spark plugs
• Speed sensor
• Speed sensor input
• Stoplamp/ clutch switch input
• Switch output
• Tach. sig.
• Tcc/ stoplamp switch (open w/brake pedal depressed) (top of brake pedal)
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• 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 ground
• Vcm input
• Vehicle control module (vcm) (in engine compartment, near brake pressure modulator valve (bpmv), at left front wheelhouse)
• Vss input
• Vss sig

5.0L

5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Pickup C3500 1996:

• (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 S), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Pickup C3500 1996:

• (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 Chevrolet Pickup C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Pickup C3500 1996:

• "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