Chevrolet Suburban C1500 1992 - ELECTRICAL COMPONENT LOCATOR 1992 ELECTRICAL COMPONENTS General Motors Co. - Electrical Components

Chevrolet Suburban C1500 1992 - BUZZERS, RELAYS & TIMERS

Chevrolet Suburban C1500 1992 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
A/C Clutch Relay	On top of A/C plenum, behind right side of dash.
Auxiliary Battery Relay	On left front inner fender panel, above wheelwell.
Auxiliary Cooling Fan Relay	On left front inner fender panel, near firewall.
Blower Relays (2)	On right side of firewall.
Cold Advance Relay (6.2L Diesel)	On right side of firewall. See Fig. 1 .
Compressed Natural Gas (CNG) Relay (5.7L CNG)	On right side of firewall. See Fig. 2 .
Daytime Running Light (DRL) Relay	Behind left side of dash, below DRL module.
Foglight Relay	Behind left side of dash, above convenience center.
Fuel Pump Relay
4.3L	On right side of firewall, near battery junction block cover. See Fig. 3 .
5.0L & 5.7L	On right side of firewall, near battery junction block cover. See Fig. 4 .
7.4L	On right side of firewall, near battery junction block cover. See Fig. 5 .
Fuel Supply Relay (5.7L CNG)	On right side of firewall. See Fig. 2 .
Hazard Flasher Relay	Under left side of dash, near convenience center.
Horn Relay	On convenience center.
Power Door Lock/Window Amplifier Relay	Under left side of dash, on left of brake pedal bracket.
Rear Window Release Relay	On center of firewall.
Speed Alert Alarm	Behind center of dash.
Transfer Case Relay	On right side of firewall, near battery junction block cover.
Turn Signal Flasher Relay	On convenience center.

Chevrolet Suburban C1500 1992 - CIRCUIT PROTECTION DEVICES

Chevrolet Suburban C1500 1992 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Circuit Breakers	On fuse block.
Battery Junction Block	On right side of firewall.
Convenience Center	Under left side of dash.
Fuel Pump In-Line Fuse (5.0L & 5.7L)	On right side of firewall, near fuel pump relay. See Fig. 4 .
Fuse Supply Fuse (5.7L CNG)	On right side of firewall. See Fig. 2 .
Fuse Block
4.3L	Under left side of dash. See Fig. 3 .
5.0L & 5.7L	Under left side of dash. See Fig. 4 .
7.4L	Under left side of dash. See Fig. 5 .
5.7L (CNG)	Under left side of dash. See Fig. 2 .
Fusible Links	At battery junction block.
Power Mirrors In-Line Fuse	Taped to harness, above fuse panel.

Chevrolet Suburban C1500 1992 - CONTROL UNITS

Chevrolet Suburban C1500 1992 CONTROL UNITS LOCATION

Component	Location
ABS Module	Mounted on side of brake master cylinder.
A/C Control/Front & Rear Heater Control Logic Module (Dual System)	Above overhead console.
A/C & Heater Control Logic Module (Single System)	In dash, behind instrument panel.
Audio Alarm Module	On convenience center.
Check Engine Light Driver Module (6.2L)	Under right side of dash, above blower motor.
Cruise Control Module	On left side of firewall, near brake booster.
Daytime Running Lights (DRL) Module	Behind left side of dash.
Diesel Elec. Control (DEC) Module (6.2L Diesel)	Behind right side of dash. See Fig. 1 .
Electronic Control Module (ECM)
4.3L	Behind right side of dash, above blower motor. See Fig. 3 .
5.0L & 5.7L	Behind right side of dash, above blower motor. See Fig. 4 .
7.4L	Behind right side of dash, above blower motor. See Fig. 5 .
5.7L (CNG)	Behind right side of dash, above blower motor. See Fig. 2 .
Elec. Spark Control (ESC) Module
4.3L	On right side of engine, on valve cover. See Fig. 3 .
5.0L & 5.7L	On right side of engine, on valve cover. See Fig. 4 .
7.4L	On right side of engine, on valve cover. See Fig. 5 .
Fuel Module
5.0L, 5.7L & 5.7L HD	Behind right side of dash. See Fig. 4 .
7.4L	Behind left side of dash, behind brake booster. See Fig. 5 .
Glow Plug Controller (6.2L)	On left rear of intake manifold.
Hot Fuel Handling Module (5.7L & 7.4L)	Behind right side of dash, above blower motor.
Low Coolant Module (6.2L)	On center of firewall.
Powertrain Control Module (PCM)	Behind right side of dash, above blower motor.
Transmission Control Module (TCM)	Behind right side of dash.
Windshield Wiper Motor Module	On firewall, behind wiper motor.

Chevrolet Suburban C1500 1992 - SENDING UNITS & SENSORS

Chevrolet Suburban C1500 1992 SENDING UNITS & SENSORS LOCATION

Component	Location
Coolant Temp. Sending Unit/Switch	In left cylinder head.
Coolant Temperature Sensor
Diesel	On right front of intake manifold.
Gasoline
4.3L	On front of engine, near coolant outlet. See Fig. 3 .
5.0L & 5.7L	On front of engine, near coolant outlet. See Fig. 4 .
7.4L	On front of engine, near coolant outlet. See Fig. 5 .
5.7L (CNG)	On front of engine, near coolant outlet. See Fig. 2 .
Engine Speed Sensor (6.2L Diesel)	On top rear of engine. See Fig. 1 .
Knock Sensor
4.3L	On lower left side of engine, under exhaust manifold. See Fig. 3 .
5.0L & 5.7L	On lower right front of engine, under exhaust manifold. See Fig. 4 .
5.7L (CNG)	On lower right front of engine, under exhaust manifold. See Fig. 2 .
7.4L	On lower right of engine, near starter. See Fig. 5 .
Low Coolant Sensor	On right rear side of radiator.
Manifold Abs. Press. (MAP) Sensor
4.3L	On right side of engine, on valve cover. See Fig. 3 .
5.0L & 5.7L	On right side of firewall. See Fig. 4 .
5.7L (CNG)	On top right rear of engine. See Fig. 2 .
6.2L Diesel	On left side of firewall, near wiper motor. See Fig. 1 .
7.4L	On right rear of engine, on valve cover. See Fig. 5 .
M/T Input/Output Speed Sensor	On left side of transmission.
Throttle Position Sensor (TPS)
6.2L Diesel	On injection pump throttle valve. See Fig. 1 .
4.3L	On throttle body assembly. See Fig. 3 .
5.0L & 5.7L	On throttle body assembly. See Fig. 4 .
7.4L	On throttle body assembly. See Fig. 5 .
5.7L (CNG)	On throttle body assembly. See Fig. 2 .
Transfer Case Speed Sensor	On left rear of transfer case.
Vehicle Speed Sensor (VSS)
4.3L	On right side of extension housing (2WD) or transfer case (4WD). See Fig. 3 .
5.0L & 5.7L	On right side of extension housing (2WD) or transfer case (4WD). See Fig. 4 .
7.4L	On right side of extension housing (2WD) or transfer case (4WD). See Fig. 5 .
Vehicle Speed Sensor (VSS) (5.7L CNG)	On right side of extension housing (2WD) or transfer case (4WD). See Fig. 2 .
Vehicle Speed Sensor Buffer	Behind glove box.
Water-In-Fuel Sensor (6.2L)	In fuel filter assembly.

Chevrolet Suburban C1500 1992 - MOTORS

Chevrolet Suburban C1500 1992 MOTORS LOCATION

Component	Location
A/C Inlet Door Motor	On A/C plenum, behind right side of dash.
Blower Motor	Under right side of dash.
Idle Air Control (IAC) Motor
4.3L	On throttle body assembly. See Fig. 3 .
5.0L & 5.7L	On throttle body assembly. See Fig. 4 .
7.4L	On throttle body assembly. See Fig. 5 .
5.7L (CNG)	On throttle body assembly. See Fig. 2 .
Windshield Washer Pumps	In washer fluid reservoir.
Windshield Wiper Motor	On left center of firewall.

Chevrolet Suburban C1500 1992 - SOLENOIDS & SOLENOID VALVES

Chevrolet Suburban C1500 1992 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
AIR Diverter Solenoid	On lower right front of engine.
Cold Advance Solenoid (6.2L)	On injection pump, on left front of engine.
EGR Vacuum Solenoid
4.3L	On top right of intake manifold. See Fig. 3 .
5.0L & 5.7L	On right side of engine, on valve cover. See Fig. 4 .
5.7L (CNG)	On right side of engine, on valve cover. See Fig. 2 .
6.2L Diesel	On top left rear of engine, near valve cover. See Fig. 1 .
7.4L	On top of engine, near right valve cover.
EGR Vent Solenoid (6.2L Diesel)	On top left rear of engine. See Fig. 1 .
Electric Air Control (EAC) Solenoid
4.3L	On right front of engine, on valve cover. See Fig. 3 .
7.4L	On right front of engine, on valve cover. See Fig. 5 .
Elec. Vacuum Regulator Valve (EVRV)
5.7L	On top right rear of engine, on valve cover.
7.4L	On top front of engine. See Fig. 5 .
Exhaust Pressure Regulator (EPR) Solenoid (6.2L Diesel)	On top left rear of engine. See Fig. 1 .
Fast Idle Solenoid (6.2L Diesel)	On injection pump, on left front of engine. See Fig. 1 .
Front Axle Solenoid	On right side of front differential case.
Fuel Cylinder Solenoids (5.7L CNG)	On each natural gas tank.
Fuel Shutoff Solenoid (6.2L)	On injection pump, on left front of engine.
Low Pressure Fuel Shut-Off Solenoid (5.7L CNG)	Under left side of cab, near crossmember.
Torque Conv. Clutch (TCC) Solenoid
4.3L	On left rear of transmission. See Fig. 3 .
5.0L & 5.7L	On left rear of transmission. See Fig. 4 .
6.2L Diesel	On left rear of transmission. See Fig. 1 .

Chevrolet Suburban C1500 1992 - SWITCHES

Chevrolet Suburban C1500 1992 SWITCHES LOCATION

Component	Location
A/C Pressure Cycling Switch	On A/C accumulator.
Auxiliary Cooling Fan Switch	On right side of engine, above spark plug.
Back-Up Light Switch (M/T)	On left side of transmission.
Brake Pressure Warning Switch	In hydraulic brake combination valve, on master cylinder.
Brake/Cruise/Stoplight Switch	On brake pedal bracket.
Clutch/Neutral Safety Switch	On clutch pedal bracket.
Coolant Temperature Switch	On left front side of engine, near exhaust manifold.
Fast Idle Temp. Switch (6.2L)	On right rear of engine, above starter.
Front Axle Solenoid Switch	Near differential case, at front of engine.
Fuel Door Cut-Off Switch (5.7L CNG)	On fuel filler door.
Fuel Pump/Oil Pressure Switch
4.3L	On left side of engine block, under exhaust manifold. See Fig. 3 .
5.0L & 5.7L	On left side of engine block, under exhaust manifold. See Fig. 4 .
Oil Pressure Sender/Switch
4.3L	On top rear of engine, near distributor. See Fig. 3 .
5.0L & 5.7L	On left rear of engine, near distributor. See Fig. 4 .
5.7L (CNG)	On left rear of engine, near distributor. See Fig. 2 .
6.2L	On top rear of engine.
7.4L	On lower left front of engine. See Fig. 5 .
Parking Brake Switch	On parking brake pedal bracket.
Park/Neutral/Backup Light Switch	On steering column, under dash.
Seat Belt Switch	On driver's seat belt buckle.
Transfer Case Switch	On left front of transfer case.

Chevrolet Suburban C1500 1992 - MISCELLANEOUS

Chevrolet Suburban C1500 1992 MISCELLANEOUS LOCATION

Component	Location
ABS Diode	Under left side of dash.
ALDL Diagnostic Connector
4.3L	Under left side of dash, left of column. See Fig. 3 .
5.0L & 5.7L	Under left side of dash, left of column. See Fig. 4 .
7.4L	Under left side of dash, left of column. See Fig. 5 .
6.2L Diesel	Under left side of dash, left of column. See Fig. 1 .
5.7L (CNG)	Under left side of dash, left of column. See Fig. 2 .
Blower Resistor	On evaporator case.
Fuel Heater (6.2L)	On fuel filter assembly.
Fuel Pump Prime/Test Connector
4.3L	On right side of firewall, near battery junction block. See Fig. 3 .
5.0L & 5.7L	On right side of firewall, near battery junction block. See Fig. 4 .
7.4L	On right side of firewall, near battery junction block. See Fig. 5 .
Fuel Supply Test Connector (5.7L CNG)	Under left side of dash. See Fig. 2 .
Power Door Lock/Window Amplifier	Under driver's seat.
Vehicle Speed Sensor Buffer	Behind glove box.