Where are the Fuse Boxes located in the 2009 GMC Sierra?

2009 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).

2009 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.

2009 GMC Sierra under Dash Fuse Box Layout

2009 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

2009 GMC Sierra Under Dash Fuse and relay Box Details

Assignment of the fuses in the Instrument Panel Fuse Block

1Rear Seats
2Rear Accessory Power Outlet
3Steering Wheel Controls Backlight
4Driver Door Module
5Dome Lamps, Driver’s Side Turn Signal
6Driver Side Turn Signal, Stoplamp
7Instrument Panel Back Lighting
8Passenger Side Turn Signal, Stoplamp
9Universal Home Remote
10Power Door Lock 2 (Unlock Feature)
11Power Door Lock 2 (Lock Feature)
12Stoplamps, Center-High Mounted Stoplamp
13Rear Climate Controls
14Power Mirror
15Body Control Module (BCM)
16Accessory Power Outlets
17Interior Lamps
18Power Door Lock 1 (Unlock Feature)
19Rear Seat Entertainment
20Ultrasonic Rear Parking Assist
21Power Door Lock 1 (Lock Feature)
22Driver Information Center (DIC)
23Not Used
24Not Used
25Driver Seat Module, Remote Keyless Entry System
26Driver 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
SEO/UPFITTERSpecial Equipment Option Upfitter Harness Connector
Circuit Breaker
CB1Passengers Side Power Window Circuit Breaker
CB2Passengers Seat Circuit Breaker
CB3Drivers Seat Circuit Breaker
CB4Rear Sliding Window

2009 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.

2009 GMC Sierra Under Hood Fuse Box Layout

2009 GMC Sierra under Hood Fuse and relay Box Diagram

2009 GMC Sierra under hood Fuse Box Details

Assignment of the fuses in the Engine compartment

1Right Trailer Stop/Turn Lamp
2Electronic Stabiity Suspension Control, Automatic Level Control Exhaust
3Left Trailer Stop/Turn Lamp
4Engine Controls
5Engine Control Module, Throttle Control
6Trailer Brake Controller
7Front Washer
8Oxygen Sensors
9Anti-lock Brakes System 2
10Trailer Back-up Lamps
11Driver’s Side Low-Beam Headlamp
12Engine Control Module (Battery)
13Fuel Injectors, Ignition Coils (Right Side)
14Transmission Control Module (Battery)
15Vehicle Back-up Lamps
16Passenger’s Side Low-Beam Headlamp
17Air Conditioning Compressor
18Oxygen Sensors
19Transmission Controls (Ignition)
20Fuel Pump
21Fuel System Control Module
22Not Used
23Not Used
24Fuel Injectors, Ignition Coils (Left Side)
25Trailer Park Lamps
26Driver’s Side Park Lamps
27Passenger’s Side Park Lamps
28Fog Lamps
30Passenger’s Side High-Beam Headlamp
31Daytime Running Lamps
32Driver’s Side High-Beam Headlamp
33Daytime Running Lights 2
35Key Ignition System, Theft Deterrent System
36Windshield Wiper
37SEO B2 Upfitter Usage (Battery)
38Electric Adjustable Pedals
39Climate Controls (Battery)
40Airbag System (Ignition)
42Audio System
43Miscellaneous (Ignition), Cruise Control
44Not Used
45Airbag System (Battery)
46Instrument Panel Cluster
47Power Take-Off
48Auxiliary Climate Control (Ignition), Compass-Temperature Mirror
49Center High-Mounted Stoplamp (CHMSL)
50Rear Defogger
51Heated Mirrors
52SEO B1 Upfitter Usage (Battery)
53Cigarette Lighter, Auxiliary Power Outlet
54Automatic Level Control Compressor Relay, SEO Upfitter Usage
55Climate Controls (Ignition)
56Engine Control Module, Secondary Fuel Pump (Ignition)
57Cooling Fan 1
58Nit Used
59Heavy Duty AntMock Brake System
60Cooling Fan 2
61Anti-lock Brake System 1
63Stud 2 {Trailer Brakes)
64Left Bussed Electrical Center 1
65Not Used
66Heated Windshield Washer System
67Four-Wheel Drive System
68Stud 1 (Trailer Connector Battery Power) (Optional – 40A Fuse Required)
69Mid-Bussed Electrical Center 1
70Climate Control Blower
71Not Used
72Left 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.

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