GM Service Manual Online
For 1990-2009 cars only

Object Number: 1849157  Size: A2

The underhood fuse block is located on the driver's side of the engine compartment, near the battery.


Object Number: 1894893  Size: B3

Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.


Object Number: 1878948  Size: C1

Fuses

Usage

FAN MAIN

Cooling Fan Main

REAR/WPR

Rear Wiper Motor

FAN AUX

Cooling Fan Auxiliary

ECM/TCM/CGCM

Engine Control Module/Transmission Control Module

ECM

Engine Control Module

ENG-3

Engine 3

ENG-2

Engine 2

ENG-1

Engine 1

HYBRID BEC

Hybrid Auxiliary BEC

RUN

Run

S/ROOF

Sunroof Module

HTD/SEAT

Heated Seat Control Module

BCM

Body Control Module

STRTR

Starter Motor

WPR

Windshield Wiper

4WD/ESCM

All-Wheel Drive System

ABS

Antilock Brake System Module

A/C CLTCH

Air Conditioning Compressor

BLWR MTR

Blower Motor

AMP

Amplifier

HORN

Horn

ABS

Antilock Brake System Module

I/P BEC

Instrument Panel Bussed Electrical Center

FRT FOG

Front Fog Lamps

I/P BEC

Instrument Panel Bussed Electrical Center

DRL

Daytime Running Light

T/LAMP RT

Right Turn and Parking Lamps

T/LAMP LT

Left Turn and Parking Lamps

TRLR T/LAMP

Trailer Parking Lamps

HDLP HI LT

Passenger Side High-Beam Headlamp

STOP LP

Stoplamps

DEFOG

Defroster Fog

HDLP LO RT

Driver Side Low-Beam Headlamp

HDLP LO LT

Passenger Side Low-Beam Headlamp

HDLP RT HI

Driver Side High-Beam Headlamp

OSRVM HTR

Outside Rearview Mirror Heating


Relays

Usage

FAN MAIN RLY

Cooling Fan Main Relay

FAN CTRL RLY

Cooling Fan Control Relay

FAN AUX RLY

Cooling Fan Auxiliary Relay

PWR/TRN RLY

Engine Control Module/CAM, Canister, Injectors, Electronic Throttle Control Relay

STRTR RLY

Starter Relay

RUN RLY

Run Relay

A/C CLTCH RLY

Air Conditioning Compressor Relay

WPR SPD RLY

Windshield Wiper Speed Relay

HORN RLY

Horn Relay

WPR CNTRL RLY

Windshield Wiper Control Relay

T/LAMP RLY

Parking Lamp Relay

HDLP HI RLY

High-Beam Headlamp Relay

HDLP LO RLY

Low--Beam Headlamp Relay

FRT FOG RLY

Front Foglamp Relay

STOP LP RLY

Stoplamp Relay

DEFOG RLY

Defroster Fog Relay

Main Underhood Fuse Block

The main underhood fuse block is located on the driver side of the engine compartment. The main underhood fuse block is the larger of the two fuse blocks in the engine compartment. Remove the fuse block cover for access to the fuses and relays. See Engine Compartment Overview for more information on its location. To remove fuses, hold the end of the fuse between your thumb and index finger and pull straight out or use the fuse puller located inside the fuse block.

Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.


Object Number: 1849156  Size: C1

Fuses

Usage

ENG 1

Engine 1

ENG 2

Engine 2

ECM

Engine Control Module

ENG 3

Engine 3

A/C COMP

Air Conditioning Compressor

MAIN

Engine Control Module/CAM, Emissions, Injectors, Electronic Throttle Control

FUEL

Fuel Pump

AWD

Not Used

ABS

Anti-lock Brake System Module (ABS)

STOP

Stoplamp

HEATING MAT

Heating Mat

HORN

Horn

WIPER

Windshield Wiper

SUNROOF*

Sunroof (Option)

ANTI-THEFT*

Theft Deterrent System (Option)

POWER SEAT*

Power Seat (Option)

HDLP LO LH

Left Headlamp Low-Beam

HDLP LO RH

Right Headlamp Low-Beam

PKLP LH

Left Parking Lamp

FRT FOG

Front Fog Lamps

H/L HI

H/L High

BLANK

Not Used

HDLP WASHER

Headlamp Washer

TCM

Transmission Control Module

T/PKLP L H

Left Turn Signal and Parking Lamp

SPARE

Spare

SPARE

Spare

SPARE

Spare

SPARE

Spare


Relays

Usage

FAN AUX RELAY

Cooling Fan Auxiliary Relay

FUEL RELAY

Fuel Pump Relay

WIPER SPEED RELAY

Windshield Wiper Speed Relay

DEFOG RELAY

Defogger Relay

HI/LO RELAY

High/Low Relay

H/L WASHER RELAY

Washer Relay

MAIN RELAY

Engine Control Module/CAM, Emissions, Injectors, Electronic Throttle Control Relay

FAN MAIN RELAY

Cooling Fan Main Relay

FAN CONTROL RELAY

Cooling Fan Control Relay

RUN RELAY

Run Relay

PARK LP RELAY

Parking Lamp Relay

STARTER RELAY

Starter Relay

A/C COMP RELAY

Air Conditioning Compressor Relay

HORN RELAY

Horn Relay

WIPER RELAY

Windshield Wiper Relay

FRT FOG RELAY

Front Fog Lamp Relay

H/L HI RELAY

H/L High Relay

Hybrid Underhood Fuse Block

The Hybrid Underhood Fuse Block is located on the passenger side of the engine compartment. It is the smaller of the two fuse blocks in the engine compartment.


Object Number: 1987528  Size: B2

Fuses

Usage

HYBRID PUMPS

Hybrid Pumps

HILL HOLD VLVS

Hill Hold Valves

AUX TRANSPUMP

Auxiliary Transmission Pump


Relays

Usage

HILL HOLD VLVS

Hill Hold Valves

AUX TRANSPUMP

Auxiliary Transmission Pump