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GMC Sierra (2007) - fuse box diagram

avatar Jonathan Yarden Mar 25, 2021 · 5 min. read

In this article you will find a description of fuses and relays GMC, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 2007

Instrument Panel Fuse Block

The instrument panel fuse block access door is located on the driver’s side edge of the instrument panel.

GMC Sierra - fuse box - instrument panel

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)
DSM Driver Seat Module, Remote Keyless Entry System
DRV UNLCK Driver’s Power Door Lock (Unlock Feature)


Circuit Breaker Usage
LT DR Driver’s Side Power Window Circuit Breaker


Harness Connector Usage
LT DR Driver’s Door Harness Connection
BODY Harness Connector
BODY Harness Connector

Center Instrument Panel Fuse Block

The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column.

GMC Sierra - fuse box - central instrument panel

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


Circuit Breaker Usage
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

The underhood fuse block is located in the engine compartment, on the driver’s side of the vehicle.

GMC Sierra - fuse box - engine compartment

Fuses 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)


J-Case Usage
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


Relays Usage
FAN HI Cooling Fan High Speed
FAN LO Cooling Fan Low Speed
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

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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