Contents Wiring diagrams Section: Electrical Component Locations All sections

Electrical Component Locator: Other GMC Sonoma II

BUZZERS, RELAYS & TIMERS

ComponentComponent Location
A/C Compressor Clutch RelayIn underhood fuse block.
Blower Motor RelayOn center rear of engine compartment.
Courtesy Lamp RelayIn body relay block.
Daytime Running Lamps (DRL) RelayIn underhood fuse block.
Door Lock RelayIn body relay block.
Door Unlock RelayIn body relay block.
Driver's Door Unlock RelayIn body relay block.
Endgate Liftglass RelayIn underhood fuse block.
Fog Lamp RelayIn underhood fuse block.
Fuel Pump RelayIn underhood fuse block.
Headlight Ground RelayIn body relay block.
Headlight Power RelayIn underhood fuse block.
High Beam RelayIn underhood fuse block.
High Mount Stoplight RelayIn underhood fuse block.
Horn RelayIn underhood fuse block.
Inadvertent Power RelayIn body relay block.
Key BuzzerUnder center of dash.
Liftglass RelayIn body relay block.
Load Leveling Timer RelayIn right rear quarter panel.
Low Beam RelayIn underhood fuse block.
Park Lamp RelayIn body relay block.
Rear Defogger RelayIn underhood fuse block.
Retained Accessory Power (RAP) RelayIn body relay block.
Starter RelayIn underhood fuse block.
Turn Signal Lamp FlasherBehind right side of dash.

BUZZERS, RELAYS & TIMERS

CIRCUIT PROTECTION DEVICES

ComponentComponent Location
Air Injection Reactor Fuse BlockMounted to right front fender next to battery.
Anti-Lock DiodeIn instrument cluster.
Battery MegafuseOn right side of radiator support, below battery.
Body Relay BlockBehind left side of dash, near dash fuse block.
Brake Warning DiodeIn instrument cluster.
Daytime Running Lamps (DRL) DiodeIn underhood fuse block.
Fuse HolderIn engine compartment, right of radiator.
Dash Fuse BlockOn left end of dash.
Power Seats Circuit BreakerIn body relay block.
Power Window Circuit BreakerIn body relay block.
Underhood Fuse BlockOn top of left front fender. (Схема №8)

CIRCUIT PROTECTION DEVICES

CONTROL UNITS

ComponentComponent Location
Automatic Transmission Controller (Utility W/Floor Shift)In center floor console.
Body Control ModuleUnder dash, on heater case.
Cruise Control ModuleOn left side of firewall.
Driver Information Display ModuleIn front overhead console.
Electronic Brake Control Module (EBCM)On left front inner fender, on brake pressure modulator valve. (Схема №8)
Electronic Climate Control ModuleCenter of dash, below radio.
Heater & A/C Controller (W/Man A/C)Under center of dash.
Ignition Control Module (ICM) (2.2L VIN 4)On right side of engine, near camshaft position sensor. Part of ignition coil assembly. (Схема №2)
Ignition Control Module (ICM) (4.3L VIN W)On top right side of engine. Part of ignition coil assembly.
Ignition Control Module (ICM) (4.3L VIN X)On top right side of engine. Part of ignition coil assembly.
Left Front Heated Seat Heater ModuleUnder left front seat.
Powertrain Control Module (PCM) (2.2L VIN 4)On right front of engine compartment.
Remote Audio PlayerIn center floor console.
Remote Control Door Lock ReceiverBehind lower left side of dash.
Remote Function Actuator (RFA) ModuleBehind left side of dash.
Right Front Heated Seat Heater ModuleUnder right front seat.
Seat Memory ModuleUnder each front seat.
Sun Roof ModuleAt front of sun roof.
Supplemental Inflatable Restraint Sensing & Diagnostic ModuleUnder console & carpet, between front seats.
Transfer Case Shift Control ModuleBehind right front kick panel.
Vehicle Control Module (VCM) (4.3L VIN W)On right front of engine compartment.
Vehicle Control Module (VCM) (4.3L VIN X)On right front of engine compartment.
Windshield Wiper Pulse Control ModuleOn center of firewall.

CONTROL UNITS

MOTORS

ComponentComponent Location
Air Injection Reactor PumpOn lower right front of engine compartment.
Air Temperature Valve Sensor & Motor (W/Auto A/C)On top right side of heater.
Blower MotorOn right rear of engine compartment.
Door Lock Actuators (4)In rear of each door.
Endgate Window Release ActuatorIn top of tailgate.
Liftgate Lock ActuatorOn bottom center of liftgate.
Liftgate Window Release ActuatorOn bottom center of liftgate liftglass.
Load Leveling PumpIn right rear quarter panel.
Power Seat Motors (5)Under each front seat.
Power Window Motors (4)In each door.
Pulse Width Modulating Drive Motor (W/Auto A/C)On right rear of engine compartment.
Recirculation Door MotorBehind right side of dash.
Sun Roof MotorIn front of sun roof.
Transfer Case Encoder MotorOn transfer case, below speed sensor.
Window Washer Pump (Rear)In washer fluid reservoir, on left front of engine compartment. (Схема №8)
Window Wiper Motor (Rear)On top center of rear tailgate.
Windshield Washer PumpIn washer fluid reservoir, on left front of engine compartment. (Схема №8)
Windshield Wiper MotorCenter of firewall, part of windshield wiper pulse control module.

MOTORS

SENDING UNITS & SENSORS

ComponentComponent Location
A/C Refrigerant Pressure Sensor (2.2L VIN 4)On A/C evaporator tube.
Ambient Air Temperature Sensor (W/Auto A/C)On right side of radiator support baffle.
Ambient Air Temperature Sensor (W/Man A/C)In front center of vehicle, near hood latch.
Ambient Light SensorOn top left side of dash.
Automatic Transfer Case (ATC) Speed Sensor (2)On left & right sides of automatic transfer case.
Camshaft Position (CMP) Sensor (2.2L VIN 4)In right side of engine, near spark plug wires. (Схема №3)
Camshaft Position (CMP) Sensor (4.3L VIN W)In distributor.
Camshaft Position (CMP) Sensor (4.3L VIN X)In distributor.
Compass Remote SensorIn headliner, above left front seat.
Crankshaft Position (CKP) Sensor (2.2L VIN 4)Lower right side of engine, below ignition coil. (Схема №3)
Crankshaft Position (CKP) Sensor (4.3L VIN W)On front of engine, near crankshaft pulley. (Схема №6)
Crankshaft Position (CKP) Sensor (4.3L VIN X)On front of engine, near crankshaft pulley. (Схема №6)
Electronic Shift Transfer Case (ESTC) Speed Sensor (2)On left & right sides of electronic shift transfer case.
Engine Coolant Temperature (ECT) Sensor (2.2L VIN 4)In coolant piping, on front of engine. (Схема №1)
Engine Coolant Temperature (ECT) Sensor (4.3L VIN W)In left cylinder head, between two rear spark plugs. (Схема №7)
Engine Coolant Temperature (ECT) Sensor (4.3L VIN X)In left cylinder head, between two rear spark plugs. (Схема №7)
Engine Oil Pressure Gauge Sensor (2.2L VIN 4)On right side of engine. (Схема №2)
Engine Oil Pressure Gauge Sensor (4.3L VIN W)On top rear of engine, near distributor. (Схема №4)
Engine Oil Pressure Gauge Sensor (4.3L VIN X)On top rear of engine, near distributor. (Схема №4)
Fuel Level Sensor (W/Fuel Pump)On top of fuel tank.
Fuel Tank Pressure SensorTop of fuel tank.
Heated Oxygen Sensor (HO2S) (Left Front) (Bank 1 Sensor 1) (4.3L VIN W)In left exhaust pipe, in front of catalytic converter.
Heated Oxygen Sensor (HO2S) (Left Front) (Bank 1 Sensor 1) (4.3L VIN X)In left exhaust pipe, in front of catalytic converter.
Heated Oxygen Sensor (HO2S) (Post-Converter) (2.2L VIN 4)In exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) (Post-Converter) (Bank 1 Sensor 3) (4.3L VIN W)In exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) (Post-Converter) (Bank 1 Sensor 3) (4.3L VIN X)In exhaust system, after catalytic converter.
Heated Oxygen Sensor (HO2S) (Pre-Converter) (2.2L VIN 4)In exhaust manifold.
Heated Oxygen Sensor (HO2S) (Right Front) (Bank 2 Sensor 1) (4.3L VIN W)In right exhaust pipe, in front of catalytic converter.
Heated Oxygen Sensor (HO2S) (Right Front) (Bank 2 Sensor 1) (4.3L VIN X)In right exhaust pipe, in front of catalytic converter.
Inside Air Temperature SensorIn roof over driver's door.
Intake Air Temperature (IAT) SensorIn fresh air intake duct.
Knock Sensor (KS) (2.2L VIN 4)On lower right side of engine. (Схема №3)
Knock Sensor (KS) (4.3L VIN W)On top rear of engine. (Схема №4)
Knock Sensor (KS) (4.3L VIN X)On top rear of engine. (Схема №4)
Load Leveling Height SensorOn frame rear crossmember.
Lower Discharge Air Temperature Sensor (Utility W/Auto A/C)On left side of floor air outlet.
Manifold Absolute Pressure (MAP) Sensor (2.2L VIN 4)On top center of engine. (Схема №1)
Manifold Absolute Pressure (MAP) Sensor (4.3L VIN W)On top center of engine. (Схема №5)
Manifold Absolute Pressure (MAP) Sensor (4.3L VIN X)On top center of engine. (Схема №5)
Mass Airflow (MAF) Sensor (4.3L VIN W)On air intake assembly.
Mass Airflow (MAF) Sensor (4.3L VIN X)On air intake assembly.
Outside Air Temperature SensorOn right radiator support bracket.
Passlock SensorAt ignition switch.
Sunload SensorTop center of dash.
Supplemental Inflatable Restraint Front End Discriminating Sensor (Left)On front frame crossmember.
Supplemental Inflatable Restraint Front End Discriminating Sensor (Right)On front frame crossmember.
Throttle Position (TP) Sensor (2.2L VIN 4)On throttle body assembly. (Схема №1)
Throttle Position (TP) Sensor (4.3L VIN W)On throttle body assembly. (Схема №4)
Throttle Position (TP) Sensor (4.3L VIN X)On throttle body assembly. (Схема №4)
Transfer Case Speed SensorOn top right rear of transfer case.
Transmission Fluid Temperature SensorPart of transmission fluid pressure manual valve position switch.
Upper Discharge Air Temperature Sensor (W/Auto A/C)On top front center of dash, behind radio in duct.
Vehicle Speed Sensor (VSS) (2.2L VIN 4) (A/T)On right rear of transmission.
Vehicle Speed Sensor (VSS) (2.2L VIN 4) (M/T)On left rear of transmission.
Vehicle Speed Sensor (VSS) (4.3L VIN W) (A/T)On right rear of transmission or transfer case.
Vehicle Speed Sensor (VSS) (4.3L VIN X) (A/T)On right rear of transmission or transfer case.
Vehicle Speed Sensor (VSS) (4.3L VIN W) (M/T)On left rear of transmission.
Vehicle Speed Sensor (VSS) (4.3L VIN X) (M/T)On left rear of transmission.
Wheel Speed SensorsInside of respective wheel.

SENDING UNITS & SENSORS

SOLENOIDS & SOLENOID VALVES

ComponentComponent Location
Air Temperature Valve Electric Actuator (W/Man A/C)On top right side of heater.
Brake Pressure Modulator Valve (BPMV)On left front inner fender, part of electrohydraulic control unit.
Brake Transmission Shift Interlock (BTSI) Solenoid (Utility W/Floor Shift A/T)On shift lever assembly, middle of floor.
Brake Transmission Shift Interlock (BTSI) Solenoid (W/Column Shift A/T)On steering column, in shift lever.
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (2.2L VIN 4)On right side of engine, above ignition coil. (Схема №2)
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (4.3L VIN W)On top right rear of engine. (Схема №5)
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (4.3L VIN X)On top right rear of engine. (Схема №5)
Evaporative Emissions (EVAP) Canister Vent Solenoid ValveOn crossmember, rear of fuel tank.
Exhaust Gas Recirculation (EGR) Valve (2.2L VIN 4)On top rear of engine. (Схема №1)
Exhaust Gas Recirculation (EGR) Valve (4.3L VIN W)On top front of engine. (Схема №5)
Exhaust Gas Recirculation (EGR) Valve (4.3L VIN X)On top front of engine. (Схема №5)
HVAC Solenoid (Auto A/C)Behind right side of dash, on HVAC assembly.
Idle Air Control (IAC) Valve (2.2L VIN 4)On throttle body assembly. (Схема №1)
Idle Air Control (IAC) Valve (4.3L VIN W)On throttle body assembly. (Схема №4)
Idle Air Control (IAC) Valve (4.3L VIN X)On throttle body assembly. (Схема №4)
Load Leveling Air Direction ValveIn right rear quarter panel.
Park Lock Solenoid (W/Floor Shift A/T)On steering column.
Pressure Control Solenoid (PC SOL) ValveInside automatic transmission.
Torque Converter Clutch Pulse Width Modulation Solenoid (TCC PWM SOL) ValveInside automatic transmission.
Torque Converter Clutch Solenoid (TCC SOL) ValveInside automatic transmission.
Window Release Solenoid (Rear)In center of tailgate.
1-2 Shift Solenoid (1-2 SS) ValveInside transmission.
2-3 Shift Solenoid (2-3 SS) ValveInside transmission.
3-2 Shift Solenoid (3-2 SS) ValveInside transmission.

SOLENOIDS & SOLENOID VALVES

SWITCHES

ComponentComponent Location
A/C Compressor Clutch SwitchOn A/C compressor.
A/C Compressor Pressure Cycling Switch (4.3L VIN W)At A/C accumulator.
A/C Compressor Pressure Cycling Switch (4.3L VIN X)At A/C accumulator.
A/C Compressor High Pressure Switch (4.3L VIN W)On rear of A/C compressor.
A/C Compressor High Pressure Switch (4.3L VIN X)On rear of A/C compressor.
Automatic Transmission Fluid Pressure Manual Valve Position SwitchInside transmission.
Back-Up Lamp Switch (A/T)Part of transmission range switch.
Back-Up Lamp Switch (M/T) (2.2L VIN 4)On right side of transmission.
Back-Up Lamp Switch (M/T) (4.3L VIN W)On left side of transmission.
Back-Up Lamp Switch (M/T) (4.3L VIN X)On left side of transmission.
Brake Pressure Warning SwitchAt right end of EBCM.
Clutch Pedal Position (CPP) & Cruise Control Cut-Out Switch (M/T)On clutch pedal support bracket.
Front Axle SwitchOn front axle, right of differential.
Liftgate Lock SwitchOn bottom center of liftgate.
Load Leveling Inflator SwitchIn right rear quarter panel.
Manual Transmission Clutch Start SwitchOn clutch pedal support bracket.
Mode Door SwitchPart of HVAC controller.
Park Brake Warning SwitchOn base of park brake assembly.
Park/Neutral Position (PNP) SwitchPart of transmission range switch.
Park SwitchPart of automatic transmission controller.
Seat Belt Switch (2)Under each respective front seat.
Stoplight SwitchOn brake pedal support bracket.
TCC SwitchOn brake pedal support bracket.
Transmission Range (TR) SwitchOn left side of transmission.
Wiper Cut-Out Switch (Rear)Inside tailgate.

SWITCHES

MISCELLANEOUS

ComponentComponent Location
A/C Compressor Clutch Diode (2.2L VIN 4)In A/C compressor wire harness, between A/C compressor & engine harness breakout. (Схема №1)
A/C Compressor Clutch Diode (4.3L VIN W)In A/C compressor clutch wire harness, behind compressor.
A/C Compressor Clutch Diode (4.3L VIN X)In A/C compressor clutch wire harness, behind compressor.
Auxiliary Power Outlet (2)On center of dash.
Blower Motor ResistorOn right rear of engine compartment, on blower module.
Customer A/C Power Connection (W/Cold Weather Package)In left rear of engine compartment.
Data Link Connector (DLC)Under left side of dash.
Distributor (4.3L VIN W)Top rear of engine.
Distributor (4.3L VIN X)Top rear of engine.
Engine Block Heater (W/Cold Weather Package)On left rear of engine, near transmission.
Fuel Injectors (2.2L VIN 4)On top of engine, at intake ports.
Fuel Injectors (4.3L VIN W)On top of engine, at intake ports.
Fuel Injectors (4.3L VIN X)On top of engine, at intake ports.
Fuel Pump Prime ConnectorIn underhood fuse block.
High Mount Stoplight ResistorIn body harness 10 cm before breakout to high mounted stoplights.
Ignition Coil (2.2L VIN 4)On right side of engine.
Ignition Coil (4.3L VIN W)On top right side of engine. (Схема №4)
Ignition Coil (4.3L VIN X)On top right side of engine. (Схема №4)

MISCELLANEOUS

CONNECTORS

ComponentComponent Location
C100 (Black, 6 Pin)Engine harness to heated oxygen sensor extension harness, rear of engine compartment, near A/C accumulator.
C101 (2.2L VIN 4) (Black, 16 Pin)Engine harness to body harness, right of engine compartment, near powertrain control module.
C101 (4.3L VIN W) (Black, 10 Pin)Engine harness to body harness, right of engine compartment, near VCM.
C101 (4.3L VIN X) (Black, 10 Pin)Engine harness to body harness, right of engine compartment, near VCM.
C108 (W/Auto 4-Wheel Drive) (Black, 7 Pin)Transfer case extension harness to body harness, left rear engine compartment, near firewall pass-through.
C108 (W/O Auto 4-Wheel Drive) (Black, 16 Pin)Transfer case extension harness to body harness, left rear engine compartment, near firewall pass-through.
C109 (Yellow, 2 Pin)SIR body harness to anti-lock brake 4WAL harness connector, left side of engine compartment, near EBCM.
C117 (Black, 2 Pin)Engine harness to AIR harness, near VCM.
C119 (Yellow, 2 Pin)Engine harness to AIR harness, near VCM.
C175 (Gray, 20 Pin)Engine harness to A/T connector, on right side of A/T.
C203 (Black, 116 Pin)Body harness to dash harness, right of dash.
C204 (Black, 7 Pin)Body harness to floor shifter harness, front left of HVAC case.
C205 (Black, 40 Pin)Dash harness to console harness, right front of center floor console, behind access panel.
C209 (Black, 16 Pin)Body harness to dome harness, at left "A" pillar.
C210 (Black, 4 Pin)Body harness to radio steering wheel controls, front of dash, near C211.
C211 (Black/Gray, 48 Pin)Body harness to steering column harness, in front of dash, near steering column.
C217 (Black, 4 Pin)Body harness to dash harness, at top left side of dash, below dash fuse block.
C223 (Natural, 2 Pin)Dash harness to auxiliary power tray, left of C203.
C224 (Black, 4 Pin)Body harness to ashtray, in front of dash, to rear of ashtray.
C300 (Black, 2 Pin)Dome harness to sun roof overhead harness, near sun roof module.
C301 (Black, 6 Pin)Near driver information center.
C317 (Black, 6 Pin)Body harness to left front seat belt switch & power seats, under left front seat.
C401 (Natural, 5 Pin)In left rear side of frame rail.
C402 (Black, 4 Pin)Body harness to right taillight harness, at right rear of vehicle.
C403 (Black, 4 pin)Body harness to left taillight harness, at left rear of vehicle.
C411 (Black, 2 Pin)Body harness to tailgate harness, left center of rear body, at tailgate.
C412 (Gray, 4 Pin)Body harness to tailgate harness, left center of rear body, at tailgate.
C413 (Black, 6 Pin)Body harness to tailgate harness, left center of rear body, at tailgate.
C426 (Black, 8 Pin)Body harness to liftglass harness in-line connector, near upper left corner of liftgate.
C427 (Black, 1 Pin)Body harness to liftgate harness, near upper left corner of liftgate.
C428 (Black, 8 Pin)Body harness to liftgate harness, near upper right corner of liftgate.
C429 (Black, 1 Pin)Body harness to liftgate harness, near upper right corner of liftgate.
C430 (Black, 4 Pin)Chassis harness to license light harness, inside rear crossmember, in front of license plate.
C432 (Black, 1 Pin)Body harness to endgate coiled cord connector, at left rear upper body, near tailgate liftglass.
C433 (Gray, 1 Pin)Body harness to right side tailgate coiled cord, at right rear upper body, near tailgate liftglass.
C500 (W/Power Locks/Windows) (Gray, 22 Pin)Body harness to left front door harness, in left front door.
C500 (W/O Power Locks/Windows) (Black, 4 Pin)Body harness to left front door harness, in left front door.
C501 (Black, 16 Pin)Body harness to left front door harness, in left front door.
C601 (W/Power Locks/Windows) (Gray, 22 Pin)Body harness to right front door harness, in right front door.
C601 (W/O Power Locks/Windows) (Black, 4 Pin)Body harness to right front door harness, in right front door.

CONNECTORS

GROUNDS

ComponentComponent Location
G100Between AIR pump breakout & breakout to engine harness.
G102 (2.2L VIN 4)Engine harness, right front of engine, under generator. (Схема №2)
G102 (4.3L VIN W)Engine harness, right rear of cylinder head.
G103 (2.2L VIN 4)Engine harness, right front of engine, under generator. (Схема №2)
G103 (4.3L VIN W)Engine harness, right rear of cylinder head.
G104Engine harness, left rear of cylinder head.
G105 (2.2L VIN 4)Engine harness, right rear of engine, near ignition control module. (Схема №2)
G105 (4.3L VIN W)Engine harness, left rear of cylinder head.
G106Battery negative harness, right side frame rail, forward of right front wheel.
G107Battery negative harness, right front of engine.
G108Battery negative harness, right of radiator support, near battery fuse.
G109Forward light harness, left side of radiator support.
G110Body harness, left side of radiator support.
G111Body harness, left side of radiator support.
G112Body harness, right side of radiator support.
G113Body harness, left rear of engine compartment, near cruise control module.
G117Body harness, left rear engine compartment, near cruise control module.
G1184WAL/SIR harness, at right frame rail, forward of right front wheel.
G200Body harness, left rear firewall, above firewall pass-through.
G201Body harness, left rear firewall, above firewall pass-through.
G202Body harness, left rear firewall, above firewall pass-through.
G203Body harness, right of dash, near C203.
G204Body harness, right of dash, near C203.
G205Body harness, right of dash, near C203.
G206Body harness, right of dash, near C203.
G207Steering column harness, near multifunction switch.
G402 (Pickup)Chassis harness, attached to fuel filler neck ground strap.
G402 (Utility)Chassis harness, rear left side of crossmember, near SP423.
G420Body harness, right rear corner of vehicle.
G422Chassis harness, rear of right side frame rail.
G450Body harness, left rear corner of vehicle.

GROUNDS