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In this article, you will find information about the fuses of the GMC Sierra (GMT900; models 2007 and 2008), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in GMC Sierra
The wiring circuits in your vehicle are protected from short circuits by a combination of fuses, circuit breakers and fusible thermal links. Circuit breakers protect the power windows and other power accessories. If the current load is too heavy, the circuit breaker opens and then closes after a cool down period, protecting the circuit until the problem is fixed or goes away. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse.
Caution!
- Do not add anything electrical to your vehicle unless you check with your dealer first.
- Some add-on electrical equipment can keep other components from working as they should.
- Add-on equipment can drain your vehicle’s battery, even if your vehicle is not operating.
- Be sure you replace a bad fuse with a new one of the identical size and rating.
Location of Fuse Boxes
Instrument Panel Fuse Block:
The instrument panel fuse block access door is located on the driver’s side edge of the instrument panel. Pull off the cover to access the fuse block.
Center Instrument Panel Fuse Block:
The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column.
Underhood Fuse Block:
The underhood fuse block is located in the engine compartment, on the driver’s side of the vehicle. Lift the cover to access the fuse block.
The windshield wiper motor is protected by an internal circuit breaker and a fuse. If the motor overheats due to heavy snow, etc., the wiper will stop until the motor cools.
Fuse Box Diagrams
2007
Instrument Panel Fuse Block
| Fuses | Usage |
|---|---|
| REAR SEAT | Rear Seats |
| AUX PWR2 | Rear Accessory Power Outlet |
| SWC BKLT | Steering Wheel Controls Backlight |
| DDM | Driver Door Module |
| CTSY | Dome Lamps, Driver’s Side Turn Signal |
| LT STOP TRN | Driver Side Turn Signal, Stoplamp |
| DIM | Instrument Panel Back Lighting |
| RT STOP TRN | Passenger Side Turn Signal, Stoplamp |
| PDM | Passenger Door Module, Universal Home Remote System |
| UNLCK2 | Power Door Lock 2 (Unlock Feature) |
| LCK2 | Power Door Lock 2 (Lock Feature) |
| STOP LAMPS | Stoplamps, Center-High Mounted Stoplamp |
| REAR HVAC | Rear Climate Controls |
| PWR MIR | Power Mirror |
| BCM | Body Control Module (BCM) |
| AUX PWR | Accessory Power Outlets |
| IS LAMPS | Interior Lamps |
| UNLCK1 | Power Door Lock 1 (Unlock Feature) |
| OBS DET | Ultrasonic Rear Parking Assist |
| LCK1 | Power Door Lock 1 (Lock Feature) |
| REAR WPR | Not Used |
| COOLED SEATS | Not Used |
| DSM | Driver Seat Module, Remote Keyless Entry System |
| DRV UNLCK | Driver’s Power Door Lock (Unlock Feature) |
| LT DR | Driver’s Side Power Window Circuit Breaker |
| LT DR | Driver’s Door Harness Connection |
| BODY | Harness Connector |
| BODY | Harness Connector |
Center Instrument Panel Fuse Block
| Harness Connector | Usage |
|---|---|
| BODY 2 | Body Harness Connector 2 |
| BODY 1 | Body Harness Connector 1 |
| BODY 3 | Body Harness Connector 3 |
| HEADLINER 3 | Headliner Harness Connector 3 |
| HEADLINER 2 | Headliner Harness Connector 2 |
| HEADLINER 1 | Headliner Harness Connector 1 |
| BRAKE CLUTCH | Brake Clutch Harness Connector |
| SEO/UPFITTER | Special Equipment Option Upfitter Harness Connector |
| CB1 | Passenger’s Side Power Window Circuit Breaker |
| CB2 | Passenger’s Seat Circuit Breaker |
| CB3 | Driver’s Seat Circuit Breaker |
| CB4 | Not Used |
Underhood Fuse Block
| № | Usage |
|---|---|
| 1 | Right Trailer Stop/Turn Lamp |
| 2 | Not Used |
| 3 | Electronic Stability Suspension Control, Automatic Level Control Exhaust |
| 4 | Left Trailer Stop/Turn Lamp |
| 5 | Engine Controls |
| 6 | Engine Control Module, Throttle Control |
| 7 | Trailer Brake Controller |
| 8 | Front Washer |
| 9 | Oxygen Sensors |
| 10 | Anti-lock Brakes System 2 |
| 11 | Trailer Back-up Lamps |
| 12 | Driver’s Side Low-Beam Headlamp |
| 13 | Engine Control Module (Battery) |
| 14 | Fuel Injectors, Ignition Coils (Right Side) |
| 15 | Transmission Control Module (Battery) |
| 16 | Vehicle Back-up Lamps |
| 17 | Passenger’s Side Low-Beam Headlamp |
| 18 | Air Conditioning Compressor |
| 19 | Oxygen Sensors |
| 20 | Transmission Controls (Ignition) |
| 21 | Fuel Pump |
| 22 | Fuel System Control Module |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Fuel Injectors, Ignition Coils (Left Side) |
| 26 | Trailer Park Lamps |
| 27 | Driver’s Side Park Lamps |
| 28 | Passenger’s Side Park Lamps |
| 29 | Fog Lamps |
| 30 | Horn |
| 31 | Passenger’s Side High-Beam Headlamp |
| 32 | Daytime Running Lamps |
| 33 | Driver’s Side High-Beam Headlamp |
| 34 | Not Used |
| 35 | Sunroof |
| 36 | Key Ignition System, Theft Deterrent System |
| 37 | Windshield Wiper |
| 38 | SEO B2 Upfitter Usage (Battery) |
| 39 | Electric Adjustable Pedals |
| 40 | Climate Controls (Battery) |
| 41 | Airbag System (Ignition) |
| 42 | Amplifier |
| 43 | Audio System |
| 44 | Miscellaneous (Ignition), Cruise Control |
| 45 | Tailgate Open / Close Assist |
| 46 | Airbag System (Battery) |
| 47 | OnStar, Rear Seat Entertainment Display |
| 48 | Instrument Panel Cluster |
| 49 | Power Take-Off |
| 50 | Auxiliary Climate Control (Ignition), Compass-Temperature Mirror |
| 51 | Center High-Mounted Stoplamp (CHMSL) |
| 52 | Rear Defogger |
| 53 | Heated Mirrors |
| 54 | SEO B1 Upfitter Usage (Battery) |
| 55 | Cigarette Lighter, Auxiliary Power Outlet |
| 56 | Automatic Level Control Compressor Relay, SEO Upfitter Usage |
| 57 | Climate Controls (Ignition) |
| 58 | Engine Control Module, Secondary Fuel Pump (Ignition) |
| 59 | Cooling Fan 1 |
| 60 | Automatic Level Control Compressor |
| 61 | Heavy Duty Anti-lock Brake System |
| 62 | Cooling Fan 2 |
| 63 | Anti-lock Brake System 1 |
| 64 | Starter |
| 65 | Stud 2 (Trailer Brakes) |
| 66 | Left Bussed Electrical Center 1 |
| 67 | Not Used |
| 68 | Heated Windshield Washer System |
| 69 | Four-Wheel Drive System |
| 70 | Stud 1 (Trailer Connector Battery Power) (Optional - 40A Fuse Required) |
| 71 | Mid-Bussed Electrical Center 1 |
| 72 | Climate Control Blower |
| 73 | Tailgate Open / Close Assist |
| 74 | Left Bussed Electrical Center 2 |
| FAN HI | Cooling Fan High Speed |
| FAN LO | Cooling Fan Low Speed |
| ENG EXH VLV | Not Used |
| FAN CNTRL | Cooling Fan Control |
| HDLP LO/HID | Low-Beam Headlamp |
| FOG LAMP | Front Fog Lamps |
| A/C CMPRSR | Air Conditioning Compressor |
| STRTR | Starter |
| PWR/TRN | Powertrain |
| FUEL PMP | Fuel Pump |
| PRK LAMP | Parking Lamps |
| REAR DEFOG | Rear Defogger |
| RUN/CRANK | Switched Power |
2008
Instrument Panel Fuse Block
| № | Usage |
|---|---|
| 1 | Rear Seats |
| 2 | Rear Accessory Power Outlet |
| 3 | Steering Wheel Controls Backlight |
| 4 | Driver Door Module |
| 5 | Dome Lamps, Driver Side Turn Signal |
| 6 | Driver Side Turn Signal, Stoplamp |
| 7 | Instrument Panel Back Lighting |
| 8 | Passenger Side Turn Signal, Stoplamp |
| 9 | Passenger Door Module, Universal Home Remote System |
| 10 | Power Door Lock 2 (Unlock Feature) |
| 11 | Power Door Lock 2 (Lock Feature) |
| 12 | Stoplamps, Center-High Mounted Stoplamp |
| 13 | Rear Climate Controls |
| 14 | Power Mirror |
| 15 | Body Control Module (BCM) |
| 16 | Accessory Power Outlets |
| 17 | Interior Lamps |
| 18 | Power Door Lock 1 (Unlock Feature) |
| 19 | Rear Seat Entertainment |
| 20 | Ultrasonic Rear Parking Assist |
| 21 | Power Door Lock 1 (Lock Feature) |
| 22 | Driver Information Center (DIC) |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Driver Seat Module, Remote Keyless Entry System |
| 26 | Driver Power Door Lock (Unlock Feature) |
| LT DR | Driver Side Power Window Circuit Breaker |
| LT DR | Driver Door Harness Connection |
| BODY | Harness Connector |
| BODY | Harness Connector |
Center Instrument Panel Fuse Block
| Harness Connector | Usage |
|---|---|
| BODY 2 | Body Harness Connector 2 |
| BODY 1 | Body Harness Connector 1 |
| BODY 3 | Body Harness Connector 3 |
| HEADLINER 3 | Headliner Harness Connector 3 |
| HEADLINER 2 | Headliner Harness Connector 2 |
| HEADLINER 1 | Headliner Harness Connector 1 |
| SEO/UPFITTER | Special Equipment Option Upfitter Harness Connector |
| CB1 | Passenger Side Power Window Circuit Breaker |
| CB2 | Passenger Seat Circuit Breaker |
| CB3 | Driver Seat Circuit Breaker |
| CB4 | Rear Sliding Window |
Underhood Fuse Block
| № | Usage |
|---|---|
| 1 | Right Trailer Stop/Turn Lamp |
| 2 | Electronic Suspension Control, Automatic Level Control Exhaust |
| 3 | Left Trailer Stop/Turn Lamp |
| 4 | Engine Controls |
| 5 | Engine Control Module, Throttle Control |
| 6 | Trailer Brake Controller |
| 7 | Front Washer |
| 8 | Oxygen Sensor |
| 9 | Antilock Brakes System 2 |
| 10 | Trailer Back-up Lamps |
| 11 | Driver Side Low-Beam Headlamp |
| 12 | Engine Control Module (Battery) |
| 13 | Fuel Injectors, Ignition Coils (Right Side) |
| 14 | Transmission Control Module (Battery) |
| 15 | Vehicle Back-up Lamps |
| 16 | Passenger Side Low-Beam Headlamp |
| 17 | Air Conditioning Compressor |
| 18 | Oxygen Sensors |
| 19 | Transmission Controls (Ignition) |
| 20 | Fuel Pump |
| 21 | Fuel System Control Module |
| 22 | Not Used |
| 23 | Not Used |
| 24 | Fuel Injectors, Ignition Coils (Left Side) |
| 25 | Trailer Park Lamps |
| 26 | Driver Side Park Lamps |
| 27 | Passenger Side Park Lamps |
| 28 | Fog Lamps |
| 29 | Horn |
| 30 | Passenger Side High-Beam Headlamp |
| 31 | Daytime Running Lamps |
| 32 | Driver Side High-Beam Headlamp |
| 33 | Daytime Running Lights 2 |
| 34 | Sunroof |
| 35 | Key Ignition System, Theft Deterrent System |
| 36 | Windshield Wiper |
| 37 | SEO B2 Upfitter Usage (Battery) |
| 38 | Electric Adjustable Pedals |
| 39 | Climate Controls (Battery) |
| 40 | Airbag System (Ignition) |
| 41 | Amplifier |
| 42 | Audio System |
| 43 | Miscellaneous (Ignition), Cruise Control |
| 44 | Not Used |
| 45 | Airbag System (Battery) |
| 46 | Instrument Panel Cluster |
| 47 | Power Take-Off |
| 48 | Auxiliary Climate Control (Ignition), Compass-Temperature Mirror |
| 49 | Center High-Mounted Stoplamp (CHMSL) |
| 50 | Rear Defogger |
| 51 | Heated Mirrors |
| 52 | SEO B1 Upfitter Usage (Battery) |
| 53 | Cigarette Lighter, Auxiliary Power Outlet |
| 54 | Automatic Level Control Compressor Relay, SEO Upfitter Usage |
| 55 | Climate Controls (Ignition) |
| 56 | Engine Control Module, Secondary Fuel Pump (Ignition) |
| 57 | Cooling Fan 1 |
| 58 | Not Used |
| 59 | Heavy Duty Antilock Brake System |
| 60 | Cooling Fan 2 |
| 61 | Antilock Brake System 1 |
| 62 | Starter |
| 63 | Stud 2 (Trailer Brakes) |
| 64 | Left Bussed Electrical Center 1 |
| 65 | Not Used |
| 66 | Heated Windshield Washer System |
| 67 | Four-Wheel Drive System |
| 68 | Stud 1 (Trailer Connector Battery Power) (Optional - 40A Fuse Required) |
| 69 | Mid-Bussed Electrical Center 1 |
| 70 | Climate Control Blower |
| 72 | Not Used |
| 73 | Left Bussed Electrical Center 2 |
| FAN HI | Cooling Fan High Speed |
| FAN LO | Cooling Fan Low Speed |
| ENG EXH VLV | Not Used |
| FAN CNTRL | Cooling Fan Control |
| HDLP LO/HID | Low-Beam Headlamp |
| FOG LAMP | Front Fog Lamps |
| A/C CMPRSR | Air Conditioning Compressor |
| STRTR | Starter |
| PWR/TRN | Powertrain |
| FUEL PMP | Fuel Pump |
| PRK LAMP | Parking Lamps |
| REAR DEFOG | Rear Defogger |
| RUN/CRANK | Switched Power |