GMC Sonoma (2003 – 2004) – fuse box diagram
Year of production: 2003, 2004
Instrument Panel Fuse Block
The instrument panel fuse block is at the driver’s end of the instrument panel.
| Fuse/Circuit Breaker | Usage |
| A | Not Used |
| B | Not Used |
| 1 | Not Used |
| 2 | Cigarette Lighter, Data Link Connector |
| 3 | Cruise Control, Body Controls TBC, Cruise Module, Cruise Switch |
| 4 | Gages, Body Controls TBC, Instrument Panel Cluster, B+ Power |
| 5 | Parking Lamps, Power Window Switch, TBC, Ashtray Lamp |
| 6 | Not Used |
| 7 | Headlamp Switch, Body Controls TBC, Headlamp Relay |
| 8 | Courtesy Lamps, Inadvertent Power Relay |
| 9 | HVAC Control Head |
| 10 | Turn Signal |
| 11 | Instrument Panel Cluster, Engine Controls |
| 12 | Interior Illumination |
| 13 | Auxiliary Power |
| 14 | Power Locks |
| 15 | 4WD Switch, Engine Control (VCM, PCM, Transmission) |
| 16 | Supplemental Inflatable Restraint |
| 17 | Front Wiper |
| 18 | Not Used |
| 19 | Radio Battery |
| 20 | Not Used |
| 21 | HVAC I, HVAC Control Head, HVAC Devices |
| 22 | Anti-Lock Brakes |
| 23 | Rear Wiper |
| 24 | Radio, Ignition |
Engine Compartment Fuse Block
The fuse block is under the hood on the driver’s side of the engine compartment.
| Name | Usage |
| TRL TRN | Trailer Left Turn |
| TRR TRN | Trailer Right Turn |
| TRL B/U | Trailer Back Up Lamps |
| VEH B/U | Vehicle Back-Up Lamps |
| HDLP PWR | Headlamp Power |
| RT TURN | Right Turn Signal Front |
| LT TURN | Left Turn Signal Front |
| HDLP W/W | Not Used |
| LT TRN | Left Turn Signal Rear |
| RT TRN | Right Turn Signal Rear |
| RR PRK | Right Rear Parking Lamps |
| TRL PRK | Trailer Park Lamps |
| LT HDLP | Left Headlamp |
| RT HDLP | Right Headlamp |
| FRPRK | Front Parking Lamps |
| INT BAT | Instrument Panel Fuse Block Feed |
| ENG I | Engine Sensors/Solenoids, MAF, CAM, PURGE, VENT |
| ECM B | Engine Control Module, Fuel Pump Module, Oil Pressure |
| ABS | Anti-Lock Brake System |
| ECM I | Engine Control Module Injectors |
| F/PUMP | Fuel Pump |
| DRL | Daytime Running Lamps |
| A/C | Air Conditioning |
| HORN | Horn |
| BTSI | Automatic Transmission Shift Lock Control System |
| B/U LP | Back Up Lamps |
| IGN B | Column Feed, IGN 2, 3, 4 |
| STARTER | Starter |
| RAP | Retained Accessory Power |
| LD LEV | Not Used |
| OXYSEN | Oxygen Sensor |
| IGN E | Engine |
| MIR/LKS | Mirrors, Door Locks |
| FOG LP | Fog Lamps |
| IGN A | Starting and Charging Ignition 1 |
| STUD #2 | Accessory Feeds, Electric Brake |
| PARKLP | Parking Lamps |
| LR PRK | Left Rear Parking Lamps |
| LIFTGLASS | Liftglass |
| IGN C | Starter Solenoid, Fuel Pump, PRNDL |
| HTDSEAT | Heated Seat |
| HVAC | Heating,Ventilation, Air Cooling System |
| TRCHMSL | Trailer Center High Mount Stop Light |
| RRDFOG | Rear Defogger |
| TBC | Truck Body Computer |
| CRANK | Clutch Switch, NSBU Switch |
| CHMSL | Center High Mounted Stoplamp |
| HAZLP | Hazard Lamps |
| VECHMSL | Vehicle Center High-Mounted Stop Lamp |
| RR DEFOG | Rear Defogger |
| HTDMIR | Heated Mirrors |
| ATC | Transfer Case (Four-Wheel Drive) |
| STOPLP | Stoplamps |
| RR W/W | Rear Window Wiper |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.