Jonathan Yarden Feb 11, 2021 · 5 min. read
In this article you will find a description of fuses and relays Chevrolet,
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: 2003, 2004
Instrument panel
The fuse block is in the instrument panel on the driverâs side.
| Fuses/Circuit Breaker | Circuit protected |
| A | Not Used |
| B | Not Used |
| 1 | Not Used |
| 2 | Cigarette Lighter, Data Link Connector |
| 3 | Cruise Control Module and Switch, Body Control Module, Heated Seats |
| 4 | Gages, Body Control Module, Instrument Panel Cluster |
| 5 | Parking Lamps, Power Window Switch, Body Control Module, Ashtray Lamp |
| 6 | Steering Wheel Radio Controls |
| 7 | Headlamps Switch, Body Control Module, Headlamp Relay |
| 8 | Courtesy Lamps, Battery Run-Down Protection |
| 9 | Heating, Ventilation, Air Cooling Control Head (Manual) |
| 10 | Turn Signal |
| 11 | Cluster, Engine Control Module |
| 12 | Interior Lights |
| 13 | Auxiliary Power |
| 14 | Power Locks Motor |
| 15 | 4WD Switch, Engine Controls (VCM, PCM, Transmission) |
| 16 | Supplemental Inflatable Restraint |
| 17 | Front Wiper |
| 18 | Steering Wheel Radio Controls |
| 19 | Radio Battery |
| 20 | Amplifier |
| 21 | Heating, Ventilation, Air Cooling (Manual), Heating, Ventilation, Air Cooling (Automatic), Heating, Ventilation, Air Cooling Sensors (Automatic) |
| 22 | Air-Bag Brakes |
| 23 | Rear Wiper |
| 24 | Radio, Ignition |
Engine Compartment Fuse Block
The fuse block under the hood at the driverâs de of the engine compartment.
| Name | Usage |
| TRL TRN | Trailer Left Tur |
| 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 |
| F PRK | Front Parking Lamp |
| INT BAT | Instrument Panel Fuse Block Feed |
| ENG 1 | Engine Sensor/Solenoid, MAP, CAM, PURGE, VENT |
| ECM B | Engine Control Module Fuel Pump, Module, Oil Pressure |
| ABS | Anti-Lock Brake System |
| ECM I | Engine Control Module Injector |
| F/PUMP | Fuel Pump |
| DRL | Daytime Running Lamps |
| A/C | Air Conditioning |
| HORN | Horn |
| W/W PMP | Not Used |
| 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 |
| OXYGEN | 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 |
| 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 Stoplamp |
| RR DEFOG | Rear Defogger |
| HTDMIR | Heated Mirrors |
| ATC | Transfer Case (Four-Wheel Drive) |
| STOPLP | Stoplamps |
| RR W/W | Rear Window Wiper |
WARNING:Â Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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