Engine Compartment Fuse Block
The fuse block is located under the hood in the engine compartment on the driver’s side of the vehicle.
| Mini fuses | Usage |
| 1 | ECAS |
| 2 | Passenger’s Side High-Beam Headlamp |
| 3 | Passenger’s Side Low-Beam Headlamp |
| 4 | Back-Up Trailer Lamps |
| 5 | Driver’s Side High-Beam Headlamp |
| 6 | Driver’s Side Low-Beam Headlamp |
| 7 | WASH |
| 8 | ATC |
| 9 | Windshield Wipers |
| 10 | Powertrain Control Module B |
| 11 | Fog Lamps |
| 12 | ST/LP |
| 13 | Cigarette Lighter |
| 14 | COILS |
| 15 | RIDE |
| 16 | TBD — Ignition 1 |
| 17 | Crank |
| 18 | Air Bag |
| 19 | ELEK Brake |
| 20 | Cooling Fan |
| 21 | Horn |
| 22 | Ignition E |
| 23 | ETC |
| 24 | Instrument Panel Cluster, Driver Information Center |
| 25 | Automatic Shift Lock Control System |
| 26 | ENG 1 |
| 27 | Back-Up |
| 28 | Powertrain Control Module 1 |
| 29 | Oxygen Sensor |
| 30 | Air Conditioning |
| 31 | TBC |
| 50 | Passenger’s Side Trailer TRN |
| 51 | Driver’s Side Trailer TRN |
| 52 | Hazard Flashers |
| J-Case fuses | Usage |
| 32 | Trailer |
| 33 | Anti-Lock Brakes (ABS) |
| 34 | Ignition A |
| 35 | Blower Motor |
| 36 | Ignition B |
| Micro relays | Usage |
| 37 | Blank |
| 38 | Rear Window Washer |
| 39 | Fog Lamps |
| 40 | Horn |
| 41 | Fuel Pump |
| 42 | Windshield Wipers/Washer |
| 43 | High-Beam Headlamp |
| 44 | Air Conditioning |
| Solid state relays | Usage |
| 45 | Cooling Fan |
| 46 | HDM |
| Mini relay | Usage |
| 47 | Starter |
| Miscellaneous | Usage |
| 48 | Instrument Panel Battery |
| 49 | Fuse Puller |
Rear Underseat Fuse Block
The rear underseat fuse block is located under the rear seat on the driver’s side of the vehicle.
| Fuses | Usage |
| 01 | Right Door Control Module |
| 02 | Left Door Control Module |
| 03 | LGM 2 |
| 04 | TBC 3 |
| 05 | Rear Fog Lamps |
| 06 | LGM/DSM |
| 07 | TBC 2 |
| 08 | Power Seats |
| 09 | Blank |
| 10 | DDM |
| 11 | AMP |
| 12 | PDM |
| 13 | Rear Climate Controls |
| 14 | Left Rear Parking Lamps |
| 15 | Auxiliary Power 2 |
| 16 | VEH CHMSL |
| 17 | Right Rear Parking Lamps |
| 18 | LOCKS |
| 19 | Blank |
| 20 | Sunroof |
| 21 | LOCK |
| 23 | Blank |
| 24 | UNLOCK |
| 25 | Blank |
| 26 | Blank |
| 27 | OH Battery/OnStar System |
| 29 | Rainsense Wipers |
| 30 | Parking Lamps |
| 31 | TBC 4CC |
| 32 | TBC5 |
| 33 | Front Wipers |
| 34 | VEH STOP |
| 35 | Blank |
| 36 | HVAC B |
| 37 | Front Parking Lamps |
| 38 | Left Turn Signal |
| 39 | HVAC 1 |
| 40 | TBC 4 |
| 41 | Radio |
| 42 | TR PARK |
| 43 | Right Turn Signal |
| 44 | HVAC |
| 45 | Rear Fog Lamps |
| 46 | Auxiliary Power 1 |
| 47 | Ignition 0 |
| 48 | Four-Wheel Drive |
| 49 | Blank |
| 50 | TBC IG |
| 51 | Brakes |
| 52 | TBC RUN |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.