ENGINE PERFORMANCE – GMC Cab & Chassis C3500 1996 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

5.0L

5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.0L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 5.7L (VIN R), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis 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 F), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis 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 F), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis 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 F), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN F), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis 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 F), Engine Performance Wiring Diagrams (4 of 4) for GMC Cab & Chassis C3500 1996

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

6.5L (VIN S), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (1 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (2 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

List of elements for 6.5L (VIN S), Engine Performance Wiring Diagrams (3 of 4) for GMC Cab & Chassis 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 GMC Cab & Chassis C3500 1996

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