Where are the Fuse Boxes located in the 2007 GMC Sierra?

2007 GMC Sierra has 2 main boxes with fuses and relays. One is in the cabin (Passenger Compartment) and another is under the hood (Engine Compartment).

2007 GMC Sierra Under Dash Fuse Box and Relay Location 

The Fuse and Relay box is located under the dashboard, on the driver side, below the steering, and is covered with trim.

2007 GMC Sierra under Dash Fuse Box Layout

2007 GMC Sierra under Dash Fuse and relay Box Diagram

Instrument Panel Fuse Block

The Fuse Block access door is on the Driver’s side edge of the Instrument Panel. Pull off the cover to access to fuse block

2007 GMC Sierra Under Dash Fuse and relay Box Details

Assignment of the fuses in the Instrument Panel Fuse Block

AUX PWR2Rear Accessory Power Outlet
SWC BKLTSteering Wheel Controls Backlight
DDMDriver Door Module
CTSYDome Lamps, Driver’s Side Turn Signal
LT STOP TRNDriver Side Turn Signal, Stoplamp
DIMInstrument Panel Back Lighting
RT STOP TRNPassenger Side Turn Signal, Stoplamp
PDMPassenger Door Module, Universal Home Remote System
UNLCK2Power Door Lock 2 (Unlock Feature)
LCK2Power Door Lock 2 (Lock Feature)
STOP LAMPSStoplamps, Center-High Mounted Stoplamp
REAR HVACRear Climate Controls
PWRMIRPower Mirror
BCMBody Control Module (BCM)
AUX PWRAccessory Power Outlets
IS LAMPSInterior Lamps
UNLCK1Power Door Lock 1 (Unlock Feature)
OBS DETUltrasonic Rear Parking Assist
LCK1Power Door Lock 1 (Lock Feature)
DSMDriver Seat Module, Remote Keyless Entry System
DRV UNLCKDriver’s Power Door Lock (Unlock Feature)
Circuit Breaker
LT DRDriver’s Side Power Window Circuit Breaker
Harness Connector
LT DRDriver’s Door Harness Connection
BODYHarness Connector
BODYHarness Connector

Center Instrument Panel Block

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

Assignment of the fuses in the Center Instrument Panel Fuse Block

Harness ConnectorUsage
BODY 2Body Harness Connector 2
BODY 1Body Harness Connector 1
BODY 3Body Harness Connector 3
HEADLINER 3Headliner Harness Connector 3
HEADLINER 2Headliner Harness Connector 2
HEADLINER 1Headliner Harness Connector 1
BRAKE CLUTCHBrake Clutch Harness Connector
SEO/UPFITTERSpecial Equipment Option Upfitter Harness Connector
Circuit Breaker
CB1Passenger’s Side Power Window Circuit Breaker
CB2Passenger’s Seat Circuit Breaker
CB3Driver’s Seat Circuit Breaker
CB4Not Used

2007 GMC Sierra Under Hood Fuse and Relay box location 

The Under Hood Fuse Block in the Engine Compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block.

Auxiliary Electric Cooling Fan Fuse Block
The auxiliary electric cooling fan fuse block is located in the engine compartment on the driver’s side of the vehicle next to the under hood fuse block.

2007 GMC Sierra Under Hood Fuse Box Layout

2007 GMC Sierra under Hood Fuse and relay Box Diagram

2007 GMC Sierra under hood Fuse Box Details

Assignment of the fuses in the Engine compartment

1Right Trailer Stop/Turn Lamp
2Not Used
3Electronic Stability Suspension Control, Automatic Level Control Exhaust
4Left Trailer Stop/Turn Lamp
5Engine Controls
6Engine Control Module, Throttle Control
7Trailer Brake Controller
8Front Washer
9Oxygen Sensors
10Anti-lock Brakes System 2
11Trailer Back-up Lamps
12Driver’s Side Low-Beam Headlamp
13Engine Control Module (Battery)
14Fuel Injectors, Ignition Coils (Right Side)
15Transmission Control Module (Battery)
16Vehicle Back-up Lamps
17Passenger’s Side Low-Beam Headlamp
18Air Conditioning Compressor
19Oxygen Sensors
20Transmission Controls (Ignition)
21Fuel Pump
22Fuel System Control Module
23Not Used
24Not Used
25Fuel Injectors, Ignition Coils (Left Side)
26Trailer Parle Lamps
27Driver’s Side Parle Lamps
28Passenger’s Side Parle Lamps
29Fog Lamps
31Passenger’s Side High-Beam Headlamp
32Daytime Running Lamps
33Driver’s Side High-Beam Headlamp
34Not Used
36Key Ignition System, Theft Deterrent System
37Windshield Wiper
38SEO B2 Upfitter Usage (Battery)
39Electric Adjustable Pedals
40Climate Controls (Battery)
41Airbag System (Ignition)
43Audio System
44Miscellaneous (Ignition), Cruise Control
45Tailgate Open/Close Assist
46Airbag System (Battery)
47OnStar®, Rear Seat Entertainment Display
48Instrument Panel Cluster
49Power Take-Off
50Auxiliary Climate Control (Ignition), Compass-Temperature Mirror
51Center High-Mounted Stoplamp (CHMSL)
52Rear Defogger
53Heated Mirrors
54SEO B1 Upfitter Usage (Battery)
55Cigarette Lighter, Auxiliary Power Outlet
56Automatic Level Control Compressor Relay, SEO Upfitter Usage
57Climate Controls (Ignition)
58Engine Control Module, Secondary Fuel Pump (Ignition)
59Cooling Fan 1
60Automatic Level Control Compressor
61Heavy Duty AntWock Brake System
62Cooling Fan 2
63Anti-lock Brake System 1
65Stud 2 (Trailer Brakes)
66Left Bussed Electrical Center 1
67Not Used
68Heated Windshield Washer System
69Four-Wheel Drive System
70Stud 1 (Trailer Connector Battery Power) (Optional – 40A Fuse Required)
71Mid-Bussed Electrical Center 1
72Climate Control Blower
73Tailgate Open/Close Assist
74Left Bussed Electrical Center 2
FAN HICooling Fan High Speed
FAN LOCooling Fan Low Speed
FAN CNTRLCooling Fan Control
HDLP LO/HIDLow-Beam Headlamp
FOG LAMPFront Fog Lamps
A/C CMPRSRAir Conditioning Compressor
PRK LAMPParking Lamps
REAR DEFOGRear Defogger
RUN/CRANKSwitched Power

Auxiliary box(Engine Compartment

Assignment of the fuses in the Engine compartment auxiliary box

COOL/FANCooling Fan
COOL/FANCooling Fan Relay Fuse
COOL/FANCooling Fan Fuse
COOL/FAN 1Cooling Fan Relay 1
COOL/FAN 3Cooling Fan Relay 3
COOL/FAN 2Cooling Fan Relay 2

WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.

Leave a Reply

Your email address will not be published. Required fields are marked *