ENGINE PERFORMANCE – GMC Savana Special G3500 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999:

• (lower front of engine, near crankshaft) crankshaft position sensor
• (right side of engine) evaporative emission canister purge valve
• (top left side of engine) idle air control valve
• 1-2 shift sol
• 2-3 shift sol
• Camshaft position sensor (part of distributor, rear top of engine)
• Canister vet sig
• Ckp low
• Ckp sig
• Cmp return
• Cmp signal
• Coil a hi
• Coil b hi
• Css sig
• Ect sig
• Egr position signal
• Evaporative emission canister vent valve (on left frame rail, near fuel tank)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Fuel lvl sig out
• Fuel tank press sig
• G110 (left front of engine)
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (5.7l 0nly) (in exhaust pipe in back of catalytic converter)
• Ho2s low
• Ho2s signal
• Iac high
• Iac low
• Iat sig
• Knock sens signal
• Knock sensor (top rear of engine)
• Maf signal
• Map sens signal
• Nca
• Pnk
• Pnk c
• Pwm tcc sol output
• S103
• S301
• S304
• Shift solenoid output
• Solid state
• Tan
• Tcc sol output
• Temp sens signal
• Tp sig
• Vehicle control module (vcm) (left side of engine compartment)
• Vehicle speed sensor (left side of transmission)
• Vss low
• Vss signal

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999:

• (w/4l60-e trans.)
• (w/4l80-e trans.)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 3-2 shift solenoid
• 5.0l
• 5.7l
• A/t fluid pressure manual valve position switch
• Automatic transmission
• Ecm-1 fuse 20a
• Exhaust gas recirculation valve (top front of engine)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Hot in run or start
• Ignition
• K7 eng-1 fuse 20a l8
• Nca
• Pnk
• Pnk tan
• Pressure control solenoid valve
• Red
• S130
• S132
• S133
• Tan
• Tcc pcm solenoid valve
• Tcc solenoid vlave
• Temp sensor ground
• Temp sensor signal
• Under hood fuse-relay center
• W/4l60-e 4-speed trans only

5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999:

• (engine harn, approx 8 cm from ho2s sensor) bank 2 sensor 1) s136
• (engine harness, approx 85 cm from underhood fuse-relay center toward a/c compressor clutch breakout)
• (engine harness, approx 91 cm from underhood fuse-relay center toward a/c comp. clutch breakout)
• (left front of engine) g110
• B14
• B17
• Ecm-b mini fuse 20a
• Engine coolant temperature gauge sensor (on left cylinder head, between two front spark plugs)
• F11
• Fuel lvl input
• Fuel pump & sender (in fuel tank under rear of vehicle)
• Fuel pump prime connector (on left side of engine)
• Fuel pump relay
• Fuel tank pressure sensor (in fuel tank)
• G12
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input
• Instrument cluster
• Intake air temperature sensor (front of engine compartment, part of air intake duct)
• Malfunction indicator lamp (mil) "service engine soon"
• Manifold absolute pressure sensor (top right side of engine)
• Mass air flow sensor (part of air intake duct, top front of engine)
• Odometer speedometer/
• Pnk
• Pnk tan
• Red
• S101
• S102
• S120
• S137
• S139
• S216
• Tan a
• Throttle position sensor (on side of throttle body)
• Trans fuse 20 10a
• Underhood fuse-relay center

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999:

• (engine harness, 111 cm from underhood fuse- relay center toward a/c comp. clutch breakout)
• (engine harness, 8 cm from ignition coil breakout) s153
• (engine harness, 98 cm from underhood fuse- relay center toward a/c comp. clutch breakout)
• (i/p harness, approx 10 cm into radio breakout)
• (i/p harness, approx 18 cm from engine sensors inline conn. toward bulkhead)
• (left front of engine) g110
• 5 volt reference
• 5 volts reference
• A/c com rel ctrl
• A/c comp cycling sw
• A/c compressor enable relay
• A/c request sig
• Air conditioning system
• Automatic transmission input shaft speed sensor (w/4l80-e) (left side of transmission)
• Battery
• Brake switch input
• Coil
• Cruise control module (front of engine compartment near left fender)
• Cruise ctrl sig eng
• Data link connector (under left side of dash)
• Distributor
• Egr valve ctrl
• Electronic brake control module (ebcm) (left frame rail near center of vehicle)
• Evap driver
• Fuel lvl module
• Fuel pump rly feed
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ic cntrl
• Ignition
• Ignition coil (top rear of engine)
• Ignition control module (top right side of engine, at ignition coil)
• Inpuit speed sens low
• Input speed sens high
• M4 brake fuse 18 10a n3
• Mal func lp output
• Pcs high
• Pcs low
• Pnk
• Pnk a
• Radio
• Range sig a
• Range sig b
• Range sig c
• Red
• S101
• S122
• S154
• S210
• S231
• S239
• Sensor ground
• Serial data
• Solid state
• Speed sensor input
• Stoplamp switch input
• Tcc signal
• Tcc/stoplamp switch (behind dash, on brake pedal support)
• Underhood fuse-relay center
• Vcm signal
• Vehicle control module (vcm) (left side of engine compartment)
• Vss signal
• Vss signal output

6.5L

6.5L VIN F, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999:

• (at generator bracket) g119
• (engine harness, near left top of engine)
• (engine jumper harness, approx 4 cm into crankshaft position sensor breakout)
• (engine jumper harness, approx 6 cm from optical fuel temperature sensor breakout)
• (i/p harness, approx 4 cm from steering column harness)
• (lower left front of engine, near crankshaft) crankshaft position sensor
• (top front of engine) engine coolant temperature sensor
• (top of engine)
• (top right
• 12v
• 3/2 shift sol
• 5v ref
• A/c request
• A/t fluid pressure (tfp) manual valve position switch
• A10
• A11
• A12
• A14
• A15
• Air conditioning system
• Anti-lock brake system
• App 1 gnd
• App 1 ref volt
• App 1 sig
• App 2 gnd
• App 2 sig
• App 3 gnd
• App 3 ref volt
• App 3 sig
• Automatic transmission
• Automatic transmission input shaft speed sensor (left side of transmission)
• B10
• B11
• B12
• Boost pressure sensor
• Boost sens input
• Brake switch input
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Cam posit sens sig rtn
• Camshaft posit sens
• Ckp ground
• Closure gnd
• Closure sig
• Cruise control
• Cruise on/off sw
• Cruise res/acc sw
• Cruise set/coast sig
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Ect sig
• Engine crank sens input
• Fuel pump rly ctrl
• Fuel pump sig
• Fuel temp sens
• Glow plug "wait" lp out
• Glow plug relay
• Ground
• High res sig
• Iat sig
• On/off
• Pnk
• Powertrain control module (pcm) (behind center of dash)
• Pressure control solenoid valve
• Pressure ctrl sol
• Radio, power steering control module
• Range mode sel a
• Range mode sel b
• Range mode sel c
• Red
• Resume
• S115
• S124
• S238
• S254
• Second vss sig
• Sensor gnd
• Set
• Shift sol a
• Shift sol b
• Side of engine) intake air temperature sensor
• Solid state
• Switch
• Tan
• Tcc/abs sw in
• Tft sens
• Timing stepper mtr (high)
• Timing stepper mtr (low)
• Trans input sp sig
• Transmission speed input
• Transmission temperature sensor
• Vehicle speed input
• Vehicle speed sensor (left side of transmission)
• Vehicle speed sensor buffer (below dash, near steering column)
• Vss hi
• Vss lo
• Vss rtn
• Vss sig

6.5L VIN F, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999:

• (engine jumper harness, approx 4 cm into optical fuel temper- ature sensor breakout)
• 5 volt ref
• Accelerator pedal position (app) module (below dash, attached to accelerator pedal)
• Cmp sig
• D2 trans fuse 20 10a f1
• D8 stop fuse 1 25a c7
• Electronic brake control module (left frame rail, near center of vehicle)
• High res sig
• Hot at all times
• Hot in off, run or start
• Hot in run
• I/p fuse block
• Ignition timing stepper motor (top front of engine)
• M4 brake fuse 18 10a n3
• Optical fuel/ temperature sensor (top center of engine, on fuel injection pump)
• Pnk
• Red
• S105
• S111 (i/p harness)
• S114 (i/p harness)
• S210
• Sens grd
• Tcc/stoplamp switch (behind dash, on brake pedal support)

6.5L VIN F, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999:

• (at generator bracket) g119
• (engine harness, approx 10 cm from ebcm breakout) s138
• (left frame rail, near center of vehicle)
• (near thermostat housing)
• A15
• B13
• B14
• B15
• B17
• Ecm-b fuse 20a
• Engine shutoff solenoid (top front of engine)
• F11
• Fuel lift pump
• Fuel pump prime connector (left side of engine)
• Fuel pump relay (left side of engine compt, in underhood fuse-relay center)
• Fuel solenoid (on rear of fuel injection pump)
• Fuel solenoid driver (left side of fuel injection pump)
• G12
• G125
• Gauges fuse 4 10a
• Hot at all times
• Hot in run or start
• I/p fuse block
• Instrument cluster
• Pnk
• Red
• S101
• S102
• S107 (engine jumper harness, approx 4 cm into fuel shut-off solenoid breakout)
• S112
• S120
• S216
• Service engine soon indicator
• Service throttle soon indicator
• Speedometer solid state logic
• Underhood fuse-relay center
• Wait to start "glow plugs" indicator
• Water in fuel indicator
• Water in-fuel sensor (left frame rail, near center of vehicle, part of fuel filter/management)

6.5L VIN F, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999:

• "serv eng soon" ind
• "serv throttle soon" ind
• (engine harness, 14 cm from starter solenoid breakout)
• (left frame rail, near center of vehicle, part of fuel filter/management) fuel heater
• 12v battery (fused)
• 12v battery fused
• A/c enable
• A/c system
• App 2 ref voltage
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (dlc) (under left side of dash)
• Electronic brake control module (left frame rail, near center of vehicle)
• Eng f5
• Eng-1 k7
• Eso ctrl
• Eso sol ctrl
• Fuel inj ctrl
• Fuse 20a
• Fusible link
• Fusible link (22 ga-rust)
• G119 (at generator bracket)
• Glow plug 1
• Glow plug 2
• Glow plug 3
• Glow plug 4
• Glow plug 5
• Glow plug 6
• Glow plug 7
• Glow plug 8
• Glow plug relay (top right side of engine)
• Hot at all times
• Hot in run or start
• Ignition
• Pcm gnd
• Pnk
• Powertrain control module (pcm) (behind center of dash)
• Red
• S101
• S102
• S108
• S116
• S117
• S121
• S130
• Serial data sig
• Shift sol 1/2 input
• Shift sol 2/3 input
• Tan
• Tcc pwm sol
• Underhood fuse-relay center
• Wait to start sig
• Wastegate sol ctrl
• Wastegate solenoid (top right side of engine)

7.4L

7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (1 of 4) for GMC Savana Special G3500 1999:

• (engine harn, approx 5 cm from map sensor breakout) s147
• (engine harness, approx 5 cm from map sensor breakout)
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• Air injection rly ctrl
• Anti-lock brakes system
• Cam pos sens signal
• Camshaft position sensor (part of distributor, rear top of engine)
• Ckp pos sens rtn
• Ckp pos signal in
• Crankshaft position sensor (lower front of engine, near crankshaft)
• Ect sens signal
• Egr pos input
• Evap vent vlv
• Evaporative emission canister vent valve (on left frame rail, near fuel tank)
• Evaporative emissions canister purge valve (top left side of engine)
• Feed ign
• Fuel gauge
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Fuel inj 7 ctrl
• Fuel inj 8 ctrl
• Fuel tank press sens sig
• G110 (left front of engine)
• Heated oxygen sensor bank 2 sensor 1 (in exhaust pipe in front of catalytic converter)
• Idle air control valve (top right side of engine)
• Idle air ctrl a hi (iac)
• Idle air ctrl b lo (iac)
• Ign feed
• Intake air temp sens
• Knock sens signal
• Knock sensor (on lower left side of engine)
• Knock sensor (on lower right side of engine)
• Left sens hi (post cat)
• Left sens hi (pre cat)
• Left sens lo (post cat)
• Left sens lo (pre cat)
• Map signal
• Mass air flow sens sig
• Nca
• Pnk
• Red
• Right sens lo (post cat)
• Right sens lo (pre cat)
• Rt sens hi (post cat)
• Rt sens hi (pre cat)
• S131
• S152
• Secondary air injection reaction pump clutch (lower right front of engine)
• Secondary air injection reaction pump relay (on left side of engine compartment, in underhood fuse-relay center)
• Sens rtn
• Sens sig
• Sensor rtn
• Sensor signal
• Tan
• Tcc sol ctrl
• Throttle pos sens
• Trans temp sens in
• Vehicle control module (vcm) (left side of engine compartment)
• Vehicle speed sensor (left side of trans- mission)
• Vss rtn
• Vss signal
• Vss signal out

7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (2 of 4) for GMC Savana Special G3500 1999:

• (engine harness, approx 7 cm from engine coolant temperature sensor)
• (fuel injector harness, near fuel injector connector) s140
• (fuel injector harness, near fuel injector connector) s141
• Automatic transmission
• Eng-1 fuse 20a
• Exhaust gas recirculation valve solenoid (top left side of engine)
• Fluid temperature sensor
• Fuel inj.
• G110 (left front of engine)
• Heated oxygen sensor bank 1 sensor 1 (in exhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 1 sensor 3 (inexhaust pipe in front of catalytic converter)
• Heated oxygen sensor bank 2 sensor 2 (in exhaust pipe in back of catalytic converter)
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Ignition
• Intake air temp sensor (on front of engine, part of air intake duct)
• N pressure switch
• Nca
• P pressure
• Pnk
• Pressure control solenoid valve
• R pressure switch
• Red
• S tcc
• S101
• S130
• S136
• S301
• S304
• Solenoid
• Solenoid 1-2
• Solenoid 2-3
• Switch
• Tan
• Trans fuse 20 10a
• Underhood fuse/relay center

7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (3 of 4) for GMC Savana Special G3500 1999:

• (engine harness, approx 14 cm from a/c compressor clutch breakout)
• (engine harness, approx 21 cm from maf sensor
• B13
• B14
• B17
• Brake fuse 18 10a
• Breakout) s139
• Engine coolant temperature sensor (top front of engine)
• Fuel gauge
• Fuel pump & sender (in fuel tank)
• Fuel tank pressure sensor (in fuel tank)
• G110 (left front of engine)
• G125 (lower front of engine)
• Gauges fuse 4 10a
• Hot in run
• Hot in run or start
• I/p fuse block
• Instrument cluster
• Manifold absolute pressure (map) sensor (top front side of engine)
• Mass air flow sensor (part of air intake duct, front top of engine)
• Pnk
• Red
• S101
• S102
• S112
• S122
• S137
• S210
• S216
• Service engine soon indicator
• Speed meter
• Tcc/stop- lamp switch (behind dash, on brake pedal support)
• Throttle position sensor (on side of throttle body)

7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999

List of elements for 7.4L VIN J, Engine Performance Wiring Diagrams (4 of 4) for GMC Savana Special G3500 1999:

• (engine harness, 4 cm from ect sensor breakout toward maf sensor breakout)
• (engine harness, approx 42 cm from underhood fuse block toward a/c compressor clutch breakout)
• (i/p harness) s231
• (i/p harness, approx 10 cm into radio breakout)
• (left front of engine g110
• 5v ref
• 5v return
• A/c comp rel ctrl
• A/c compressor enable relay (on left side of engine compt, in underhood fuse-relay center)
• A/c low pressure sig
• A/c request signal
• Air conditioning system
• Anti-lock brakes system
• Automatic transmission input shaft speed sensor (left side of transmission)
• B +
• Brake sw input
• Check engine lp ctrl
• Cruise control module (front of engine compt, near left fender)
• Cruise ctrl engaged
• Cruise ctrl sig-engaged
• Ctrl est
• Data link connector (under left side of dash)
• Distributor
• Ecm-b fuse 20a
• Ecm-i fuse 20a
• Egr valve ctrl
• Elec spk timing ctrl sig
• Evap purge vlv driver
• Force mtr feed
• Force mtr rtn
• Fuel pmp rly ctrl
• Fuel pump prime connector (left side of engine)
• Fuel pump relay (on left side of engine compt, in underhood fuse-relay center)
• G110 (left front of engine)
• Ground
• High voltage coil wire
• Hot at all times
• Hot in run or start
• Ign feed
• Ignition coil (top rear of engine)
• Ignition control module (top rear of engine, on ignition coil)
• Nca
• Pnk
• Press sw sig
• Radio
• Red
• S101
• S102
• S120
• S132
• S153
• S154
• S239
• Sens ground
• Sens rtn
• Serial data
• Signal return
• Signal timing ctrl elec spk
• Speed sensor input
• Tcc/stoplamp input
• Underhood fuse/relay center
• Vehicle control module (vcm) (left side of engine compartment)
• Vss output
• Vss signal