ENGINE PERFORMANCE – GMC Envoy 2008 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L VIN S

4.2L VIN S, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2008

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2008:

• (at rear of fuel tank) evaporative emission (evap) canister vent solenoid
• (in chassis harness, 13 cm before breakout to fuel pump & sender assembly) j359
• 4wd lo sig
• 5v ref
• A/c clutch rly
• Accel sw sig
• Accelerator pedal position (app) sensor
• Air conditioning system
• Air injection ctrl
• Anti-lock brakes system
• App sens 1 sig
• App sens 2 sig
• Batt pos volt
• Change engine oil ind
• Chmsl ctrl
• Class 2 ser data
• Computer data lines system
• Crank volt
• Crankshaft position (ckp) sensor (on left rear of engine block, below starter)
• Cruise control system
• Cruise ctrl set
• Cruise on sw sig
• Ecm fuse 29 10a
• Ecm i fuse 28 15a
• Eng spd sig
• Engine control module (ecm) (near lower left front of engine)
• Evap sol ctrl
• Fuel lvl sens sig
• Fuel pmp rly ctrl
• Fuel tank pressure (ftp) sensor (at top left rear of fuel tank)
• Fuel tank sens
• Hot at all times
• Hot in acc, run or start
• Hot in run or start
• Ign
• Ign 0 fuse 47 10a
• Ign e fuse 22 10a
• Ign volt
• Instrument cluster system
• Instrument panel cluster (ipc)
• J239
• J320
• Knock sensor (ks) 1 (on lower left front of engine block)
• Knock sensor (ks) 2 (on lower left rear of engine block)
• Lo ref
• Logic
• Low engine oil pressure ind
• Malfunction ind lamp (mil)
• Mil ctrl
• Pnk
• Pwrtrain rly ctrl
• Rear fuse block (below left rear seat)
• Reduce engine power ind
• Starter rly ctrl
• Starting/ charging system
• Tan
• Tcc brake sw
• Tcm cnstr fuse 15 10a
• Transmissions system
• Underhood fuse block (above left front wheelwell)
• Vehicle spd sig

4.2L VIN S, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2008

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2008:

• Air pump fuse 56 60a
• Air sol fuse 54 15a
• Air sol relay
• Camshaft actuator solenoid assembly (on right front of cylinder head)
• Camshaft position (cmp) sensor (on right front of engine block)
• D12
• E12
• Fuel injectors (top of engine)
• Fuel pump & sender assembly (top of fuel tank)
• Fuel pump relay
• G107 (on lower left side of engine)
• G305 (on outside of left frame rail, near fuel tank)
• Hot at all times
• Hot in run or start
• J111
• J306
• Nca
• Pcm b fuse 10 20a
• Pnk
• Red
• Red a
• Secondary air injection (air) pump (left front of chassis, near electronic brake control module)
• Secondary air injection (air) pump relay (left front of chassis)
• Underhood fuse block (above left front wheelwell)

4.2L VIN S, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2008

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2008:

• 12v ref
• 5v ref
• Camshaft hi ctrl
• Ckp sens sig
• Cmp sens sig
• Engine control module (ecm) (near lower left front of engine)
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• G108 (on lower left side of engine)
• Gnd
• Ho2s hi sig
• Ho2s htr lo ctrl
• Ho2s lo sig
• Iat sens sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ign volt
• J101
• Ks 1 sig
• Ks 2 sig
• Lo oil pres sw sig
• Lo ref
• Maf sens sig
• Mass air flow (maf) sensor/intake air temperature (iat) sensor (in air intake duct)
• Pnk
• Red
• Starter rly ctrl
• Tac motor ctrl 1
• Tac motor ctrl 2
• Tan
• Tp sens 1 sig
• Tp sens 2 sig

4.2L VIN S, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2008

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2008:

• (in engine harness, 22 cm before breakout to map sensor)
• (top of engine)
• A11
• C11
• Eng i fuse 26 15a
• Etc fuse 23 15a
• F10
• F11
• G109 (on lower left side of engine)
• Heated oxygen sensor (ho2s) 1 (on exhaust manifold, on right side of engine)
• Heated oxygen sensor (ho2s) 2 (downstream of catalytic converter on exhaust pipe)
• Hot at all times
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Inj a fuse 31 20a
• Inj b fuse 56 20a
• J102
• J128
• Nca
• O2 snsr a fuse 55 10a
• O2 snsr b fuse 54 10a
• Pnk
• Pnk a
• Pwr/ trn relay 57
• Spark plug
• Tan
• Underhood fuse block (above left front wheelwell)

4.2L VIN S, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2008

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2008:

• (on upper left side of engine) manifold absolute pressure sensor
• 5v ref
• A/c press sens
• Air conditioning system
• Air injection ctrl
• Air pump rly ctrl
• Anti-lock brakes system
• Computer data lines system
• Delivered torq sig
• Ect sens sig
• Engine control module (ecm) (near lower left front of engine)
• Engine coolant temperature (ect) sensor (lower right rear of engine block)
• Engine oil pressure (eop) switch (at lower right of engine block)
• Evap canister ctrl
• Evaporative emission (evap) canister purge solenoid (lower left side of engine)
• Front sig hi
• G107 (on lower left side of engine)
• Gen field sig
• Gen regu ctrl
• Hi spd data bus +
• Hi spd data bus -
• J101
• Lo ref
• Map sens sig
• Nca
• Oil press sw sig
• Pnk
• Pnp sw sig
• Red
• Request torq sig
• Sec air inj sens
• Secondary air injection (air) pump relay (left front of chassis)
• Starting/charging system
• Tan
• Throttle body (front of intake duct)
• Transmissions system

5.3L VIN M

5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2008:

• (at top rear of engine) valve lifter oil manifold (vlom) assembly
• (in right bank of exhaust pipe, ahead of catalytic converter)
• (in right bank of exhaust pipe, behind catalytic converter)
• 5 volt ref
• A/c ref pres
• A/c refrigerant pressure sensor (on high pressure line, near a/c compressor)
• Anti-lock brake system
• Computer data lines system
• Cyl sol ctrl 1
• Cyl sol ctrl 2
• Cyl sol ctrl 3
• Cyl sol ctrl 4
• Del torque sig
• Ect sensor sig
• Engine control module (ecm) (near lower left front of engine)
• Engine coolant temperature (ect) sensor (on left front of engine block, near generator)
• Evap can ctrl
• Evaporative emission (evap) canister purge solenoid (on top of engine)
• Gen field duty
• Gen reg ctrl
• Heated oxygen sensor (ho2s) bank 2 sensor 1
• Heated oxygen sensor (ho2s) bank 2 sensor 2
• Hi spd data +
• Hi spd data -
• Ho2s low ctrl
• Hos2 high sig
• Hos2 low sig
• Low ref
• Manifold absolute pressure (map) sensor (on top of engine)
• Map sensor sig
• Nca
• Pnk
• Pnp switch sig
• Red
• Req torque sig
• Shutoff cylinder solenoid 1, cylinder 1
• Shutoff cylinder solenoid 2, cylinder 4
• Shutoff cylinder solenoid 3, cylinder 6
• Shutoff cylinder solenoid 4, cylinder 7
• Sig high-frt
• Starting/ charging system
• Starting/charging system
• Tan
• Transmission control system

5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2008:

• 4wd low signal
• 5 volt ref
• A/c comp cl rel
• Air conditioning system
• Anti-lock brake system
• App sensor 1 sig
• App sensor 2 sig
• B11
• Battery
• Brake boost vac
• Computer data lines system
• Crank fuse 17 10a
• Crank voltage
• Cruise control system
• Cruise ctrl on sw
• Ecmi fuse 15a
• Engine control module (ecm) (near lower left front of engine)
• Engine speed sig
• Evap can vent sol
• Fuel lvl sens sig
• Fuel pmp rel ctrl
• Fuel pump relay
• Fuel tank press
• G107 (on lower left side of engine)
• Hot at all times
• Hot in acc, run or start
• Hot in run or start
• Hot in start
• Ign 0 fuse 47 10a
• Ign e fuse 10a
• Ign volt
• Instrument cluster system
• J239
• J320
• Low ref
• Mil ctrl
• Not used
• Pcm b fuse 10 20a
• Pnk
• Pwrtrn rly ctrl
• Rear fuse block (below left rear seat)
• Res/acc sw
• Serial data
• Set/coast sw sig
• Starter enable rel
• Starting/charging system
• Tan
• Tcc brake sw
• Tcm cnstr fuse 15 10a
• Transmission system
• Underhood fuse block (above left front wheelwell)
• Vss
• X107

5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2008:

• (in engine harness, 5 cm from breakout to x109) j112
• (on power brake booster) brake booster vacuum sensor
• (top of fuel tank) fuel pump & sender assembly
• A11
• A12
• Accelerator pedal position (app) sensor
• C11
• Camshaft position (cmp) sensor (at bottom front of engine)
• Change engine oil ind
• Crankshaft position (ckp) sensor (at right rear of engine, adjacent to starter)
• Ecm fuse 29 10a
• Eng i fuse 26 15a
• Etc fuse 23 15a
• Evaporative emission (evap) canister vent solenoid (at rear of fuel tank)
• F10
• F11
• Fuel tank pressure (ftp) sensor (at top left rear of fuel tank)
• G305 (on outside of left frame rail, near fuel tank)
• Hot at all times
• Ign
• Inj a fuse 31 20a
• Inj b fuse 56 20a
• Instrument panel cluster (ipc)
• J306
• J359 (in chassis harness, 13 cm before breakout to fuel pump & sender assembly)
• Logic
• Low engine oil pressure ind
• Malfunction indicator lamp
• Nca
• O2 snsr a fuse 55 10a
• O2 snsr b fuse 54 10a
• Pnk
• Pwr/trn relay 60
• Red
• Reduce engine power ind
• Tan
• Underhood fuse block (above left front wheelwell)

5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2008:

• (in ignition coil jumper harness, 5 cm from breakout to x108) j108
• (in ignition coil jumper harness, 5 cm from breakout to x108) j118
• (in ignition coil jumper harness, 5 cm from breakout to x109) j109
• (on lower left side of engine) g109
• Ctrl
• Engine oil pressure (eop) sensor (at left rear of engine)
• Gnd
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (in left bank exhaust pipe, ahead of catalytic converter)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (in left bank of exhaust pipe, behind catalytic converter)
• Ign
• Ignition coils (on top of valve cover)
• J119 (in ignition coil jumper harness, 5 cm from breakout to x109)
• J128
• J129
• Left knock sensor (ks) 1 (lower left side of engine)
• Nca
• Nca nca
• Pnk
• Red
• Ref lo
• Right knock sensor (ks) 2 (right side of engine block)
• Spark plug
• Tan
• Throttle body (front of intake duct)

5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2008

List of elements for 5.3L VIN M, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2008:

• (22 cm before breakout to map sensor)
• 12 volt ref
• 5 volt ref
• Ckp sensor sig
• Cmp sensor sig
• Engine control module (ecm) (near lower left front of engine)
• 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 injectors (fuel injectors 1, 3, 5 & 7: upper left side of engine) (fuel injectors 2, 4, 6 & 8: upper right side of engine)
• Ground
• Ho2s high sig
• Ho2s low sig
• Hos2 htr lo ctrl
• Iat sensor sig
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Ic 7 ctrl
• Ic 8 ctrl
• Ign volt
• J100 (10 cm from break- out to ecm)
• J101
• J102
• Ks 1 sig
• Ks 2 sig
• Low ref
• Maf sensor sig
• Mass air flow (maf)/intake air temperature (iat) sensor (in air intake duct)
• Oil press sens
• Pnk
• Pnk a
• Red
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tan
• Tp sensor 1 sig
• Tp sensor 2 sig
• Underhood fuse block (above left front wheelwell)