Engine compartment fuse block
The engine compartment fuse block is located on the driver 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 | Driver’s Side Headlamp |
| 12 | Passenger’s 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 | Driver’s 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, Passenger’s Side Taillamp, License Plate Lamps |
| 40 | Front Park/Turn Lamps, Driver and Passenger’s Side Power Window Switches Lighting |
| 41 | Climate Control Fan |
| 42 | Power Windows |
| 43 | Starter Solenoid Relay |
| 44 | Antilock Brake System 2 (ABS Pump) |
| 45 | Antilock Brake System 1 (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 |
| 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 Passenger’s Taillamp Fuse, Rear Parking Lamps |
| 54 | Driver and Passenger’s 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) |
| Miscellaneous | Usage |
| 64 | Diode — Wiper |
| 65 | Diode — Air Conditioning, Clutch |
| 66 | Mega Fuse |
| 67 | Not Used |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.