If the vehicle has the DURAMAX® Diesel engine, see the DURAMAX® Diesel manual for more information.
If the vehicle is a Two-mode Hybrid, see the Two-mode Hybrid manual for more information.
The underhood fuse block is located in the engine compartment, on the driver side of the vehicle.
Lift the cover to access the fuse block.
Notice: Spilling liquid on any electrical components on the vehicle may damage it. Always keep the covers on any electrical component.
To remove fuses, hold the end of the fuse between your thumb and index finger and pull straight out.
Fuses | 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 (DRL) |
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) |
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 | SEO Upfitter Usage |
55 | Climate Controls (Ignition) |
56 | Engine Control Module, Secondary Fuel Pump (Ignition) |
J-Case Fuses | Usage |
|---|---|
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 | Transfer Case |
68 | Stud 1 (Trailer Connector Battery Power) (Optional - 40A Fuse Required) |
69 | Mid-Bussed Electrical Center 1 |
70 | Climate Control Blower |
71 | Not Used |
72 | 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 |
