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: 2004
Engine Compartment Fuse Block
The engine compartment fuse block is located on the driverâs side of the engine compartment.
Fuses | Usage |
1 | Brake Switch, Stoplamps |
2 | Auxiliary Power 1 |
5 | Air Conditioning Control Head |
8 | Wiper/Washer Switch |
9 | Fog Lamps |
10 | Ignition Transducers |
11 | Driverâs Side Headlamp |
12 | Passengerâs Side Headlamp |
13 | Fuel Pump |
14 | Wiper |
15 | Front Axle Actuator |
16 | Antilock Brake System (ABS), ABS module, Four-Wheel Drive, Gravity Sensor |
17 | Supplemental Inflatable Restraint System, Sensing and Diagnostic Module, Air Bag Off Switch |
18 | Heated Seat |
19 | Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable |
20 | Electronic Throttle Control (ETC) |
21 | Power Door Locks |
22 | Injectors |
23 | Ignition, Clutch Starter Switch, Neutral Safety Back-Up Switch, Ignition Coils 1-5, Air Conditioning Relay |
24 | Transmission Solenoid |
25 | Powertrain Control Module (PCM) |
26 | Back-up Lights |
27 | ERLS, Map Sensor, Can Purge Solenoid |
28 | Rear Turn/Hazard Lights |
29 | Driverâs Side RearTaillamp, Passenger Side Air Bag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) |
30 | Powertrain Control Module (PCM) B |
31 | OnStar |
32 | Radio |
33 | Auxiliary Power 2 |
34 | Truck Body Controller |
35 | Horn |
36 | Transfer Case Control Module |
37 | Turn/Hazard/Courtesy/Cargo Lamps/Mirrors |
38 | Cluster |
39 | Rear Parking Lamp 1, Passengerâs Side Taillamp, License Plate Lamps |
40 | Front Park/Turn Lamps, Driver and Passengerâs Side Power Window Switches Lighting |
41 | Climate Control Fan |
42 | Power Windows |
43 | Starter Solenoid Relay |
44 | Antilock Brake System 2Â (ABS Pump) |
45 | Antilock Brake System 1Â (ABS Logic) |
 46 | Power Seat Circuit Breaker/POA Seat |
 69 | Fuel Canister Vent Solenoid |
72 | Not Used |
73 | Not Used |
74 | Not Used |
75 | Not Used |
77 | Air Conditioning Compressor |
79 | Oxygen Sensors |
Â
Relays | Usage |
47 | Beam Selection |
50 | Air Conditioning Compressor |
51 | Fuel Pump, Fuel Pump Fuse |
52 | Fog Lamps |
53 | Front Parking Lamp Fuse, Driver and Passengerâs Taillamp Fuse, Rear Parking Lamps |
54 | Driver and Passengerâs Headlamps Fuse |
55 | Horn |
56 | Electronic Throttle Control Fuse, Oxygen Sensor Fuse |
57 | Wipers (On/Off) |
58 | Power Window Fuse, Wiper/Washer Switch Fuse, (Retained Accessory Power Mode) |
59 | Ignition 3, Climate Control, Climate Control Head Fuse |
61 | Run/Crank, Air Bag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, ERLS, Front Axle, PCM-1, Injectors Fuse |
62 | Starter Relay (PCM Relay) |
63 | Wiper 2 (High/Low) |
Â
Miscellaneous | Usage |
64 | Diode â Wiper |
65 | Diode â Air Conditioning, Clutch |
66 | Mega Fuse |
67 | Not Used |
Â
WARNING:Â Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Still have questions or want to supplement the article? Discuss On Telegram