ENGINE PERFORMANCE – GMC Envoy 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.2L VIN S

4.2L VIN S, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2003

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (1 of 5) for GMC Envoy 2003:

• 4wd low sig
• 5 volt ref
• A/c compr rel
• A/c press sens
• Accelerator pedal position sensor (above accelerator pedal)
• Air conditioning system
• Anti lock brakes system
• App sens 1 sig
• App sens 2 sig
• B10
• Battery
• Body control module (bcm) (beneath left rear seat)
• Cc on sw input
• Cls 2 data
• Cool fan clutch
• Cooling fan sp
• Cooling fans system
• Crank voltage
• Cruise control system
• Data link connector (on bottom left side of dash)
• Eng spd sig out
• F14
• Fuel tank press
• Fuel tank pressure sensor (top left rear of fuel tank)
• Hot at all times
• Hot in accy, run or start
• Hot in run & start
• Iat sens sig
• Ign 0 fuse 47 10a
• Ign 0 input
• Ign 1 volt
• Ign e fuse 22 10a
• Instrument panel cluster
• Intake air temperature sensor (in air intake duct, top right of engine)
• Intrument cluster system
• Lo ref
• Low ref
• Malfunction indicator lamp
• Mil ctrl
• Pcm b fuse 10 20a
• Pnk
• Pnp sw input
• Powertrain control module (upper left side of engine)
• Prim fuel lvl
• Rear fuse block
• Res/acc sw
• S232 (i/p harn, near breakout to steering column)
• S239
• S320
• Set/cruise sw
• Sp205
• Starting/ charging system
• Stop lamp volt
• Strt enable rel
• Tan
• Tcc rel sw sig
• Tcc/brake switch (above brake pedal, on bracket)
• Theft deterrent control module (in steering column, on lock cylinder)
• Transmission controls (transfer case circuit)
• Underhood fuse block
• Vss
• Vss signal out
• W/ immob
• W/ immobilizer
• W/o immob
• W/o immobilizer

4.2L VIN S, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2003

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (2 of 5) for GMC Envoy 2003:

• A11
• Ecm b fuse 10 20a
• Eng 1 fuse 26 10a
• Engine oil level & temperature sensor
• Engine oil pressure switch (right side of eng block)
• Evaporative emission canister purge solenoid (left side of engine block)
• Evaporative emission canister vent solenoid (at rear of fuel tank)
• F/pmp relay
• Fuel pump/ & sender assembly (in fuel tank)
• G107 (lower left side of engine)
• G108 (lower left side of engine)
• G305 (on outside of left frame rail, near fuel tank)
• Hot at all times
• Hot in run & start
• Park/neutral position switch (lower left side of transmission)
• Pnk
• Pnk a
• Under- hood fuse block
• Under- hood junction block
• Vehicle speed sensor (left rear of transfer case)

4.2L VIN S, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2003

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (3 of 5) for GMC Envoy 2003:

• 1310
• (left rear of engine block) crankshaft position sensor
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 3-2 shift sol
• 5v ref
• Anti lock brakes system
• Cam pos sol hi
• Camshaft actuator solenoid assembly (right front of cylinder head)
• Ckp sens sig
• Deliv torque sig
• Ect sens sig
• Engine coolant temperature sensor (left front of engine block)
• Evap can prg ctl
• Evap can vent
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• G108 (lower left side of engine)
• Gfd cyc sig
• Ground powertrain control module (upper left side of engine)
• H02 hi sig b1 s2
• H02s hi sig b1 s1
• H02s lo sig b1 s2
• Heated oxygen sensor 1 (on exhaust manifold, right side of engine)
• Heated oxygen sensor 2 (downstream of catalytic converter)
• Ho2s htr lo b1 s1
• Ho2s htr lo b1 s2
• Ho2s lo sig b1 s1
• Hot at all times
• Hot in run & start
• Ic 1 ctrl
• Ic 2 ctrl
• Ic 3 ctrl
• Ic 4 ctrl
• Ic 5 ctrl
• Ic 6 ctrl
• Injectors
• Low ref
• Manifold absolute pressure sensor (upper left side of engine)
• Map sens sig
• Nca
• O2 fuse 29
• Oil lvl sw sig
• Oil pres sw sig
• Oil temp sens
• Pc sol high ctrl
• Pc sol low ctrl
• Pcm 1 fuse 28 15a
• Pnk
• Powertrain control module (upper left side of engine)
• Prim fuel pmp rel
• Req torque sig
• S104
• Starting/ charging system
• Tan
• Tcc pwm sol
• Tcc sol vlv ctrl
• Trns rg sw sig a
• Under- hood fuse block
• Vss high sig
• Vss low signal

4.2L VIN S, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2003

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (4 of 5) for GMC Envoy 2003:

• Automatic
• Automatic transmission
• C10
• Ctrl
• D10
• D2 sw
• D3 sw
• D4 sw
• E10
• F10
• G109 (on lower side of engine)
• Gnd
• Ign
• Ignition coils
• Lo sw
• Nca
• Pnk
• Pnk a
• Pressure control
• Red
• Rev sw
• Solenoid 1-2 shift red
• Solenoid 2-3 shift red
• Solenoid 3-2 shift red
• Solenoid tcc pmw red
• Solenoid tcc red
• Solenoid valve
• Spark plug
• Tan
• Temperature sensor
• Transmission fluid
• Under- hood fuse block

4.2L VIN S, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2003

List of elements for 4.2L VIN S, Engine Performance Wiring Diagram (5 of 5) for GMC Envoy 2003:

• 839
• (not used)
• 12v ref
• 5v ref
• Camshaft position sensor (right front of cylinder head)
• Cooling fans system
• Cpm sens sig
• Damping l/d sig
• Etc fuse 23 10a
• Gen turn on sig
• Hot in run & start
• Ign 1 voltage
• Knock sensor 1 (front) (lower left front of engine block)
• Knock sensor 2 (rear) (lower left rear of engine block)
• Ks 1 sig
• Ks 2 sig
• Low oil press sw
• Low ref
• Pnk
• Powertrain control module (upper left side of engine)
• Red
• Starting/ charging system
• Tac motor
• Tac mtr ctrl 1
• Tac mtr ctrl 2
• Tfp sw sig a
• Tfp sw sig b
• Tfp sw sig c
• Tft sens sig
• Throttle body (throttle position sensor) (on throttle body)
• Tp sens 1 sig
• Tp sens 2 sig
• Trs sig b
• Trs sig c
• Trs sig p
• Under- hood fuse block