Where are the Fuse Boxes located in the 2002 GMC Sierra?
2002 GMC Sierra has 2 main boxes with fuses and relays. One is in the cabin (Passenger Compartment) and another is under the hood (Engine Compartment).
2002 GMC Sierra Under Dash Fuse Box and Relay Location
The Fuse and Relay box is located under the dashboard, on the driver side, below the steering, and is covered with trim.
2002 GMC Sierra Under Dash Fuse Box Layout
2002 GMC Sierra Dash Fuse and relay Box Diagram
Instrument Panel Fuse Block
The instrument panel fuse block access door is located on the driver side edge of the instrument panel.
2002 GMC Sierra Under Dash Fuse and relay Box Details
Assignment of the fuses in the Instrument Panel Fuse Block
| Name | Usage |
|---|---|
| L BODY | Retained Accessory Power Relay |
| LOCK | Power Door Locks |
| DRV UNLOCK | Power Door Lock Relay |
| LOCK | Power Door Lock Relay |
| HVAC1 | Climate Control System |
| CRUISE | Cruise Control, Instrument Panel Cluster |
| IGN 3 | Ignition, Power Seats |
| 4WD | Four-Wheel Drive System, Auxiliary Battery |
| CRANK | Starting System |
| INT PRK | Parking Lamps, Sidemarker Lamps, Interior Lamps |
| LDOOR | Power Door Lock Relay |
| BRAKE | Anti-Lock Brake System |
| RR WIPER | Not Used |
| ILLUM | Interior Lamps |
| SEAT | Power Seat Circuit Breaker |
| TURN | Exterior Lamps, Turn Signals, Hazard Lamps |
| UNLOCK | Power Door Locks |
| HTR A/C | Climate Control System |
| WSWPR | Windshield Wipers |
| IGN 1 | Ignition, Instrument Panel |
| AIRBAG | Air Bag |
| MIR/LOCK | Power Mirrors, Power Door Locks |
| DR LOCK | Power Door Locks |
| PWR WDO | Power Window Circuit Breaker |
| UNLOCK | Power Door Lock Relay |
| IGN 0 | PRND321 Display, Odometer, PCM |
| SEO IGN | Special Equipment Option, Ignition, Manual Selectable Ride |
| SEO ACCY | Special Equipment Option Accessory, Cellular Telephone |
| RAP #1 | Retained Accessory Power Relay |
| RDO 1 | Audio System |
| RAP #2 | Not Used |
Center Instrument Panel Block
The center instrument panel fuse block is located underneath the instrument panel, to the left of the steering column.
Assignment of the fuses in the Center Instrument Panel Fuse Block
| Name | Usage |
|---|---|
| SEO | Special Equipment Option |
| HTD ST | Heated Seats |
| SPARE 4 | Not Used |
| VANITY | Headliner Wiring |
| TRAILER | Trailer Brake Wiring |
| PWR ST | Power Seats |
| SPARE 5 | Not Used |
| CLUTCH | Manual Transmission Clutch Switch |
| UPF | Upfitter |
| PARK LAMP | Parking Lamps (Relay) |
| FRT PRK EXPT | Not Used (Fuse) |
| SL RIDE | Manual Selectable Ride Switch |
| SPARE 2 | Not Used |
| RR PRK LP | Not Used (Relay) |
| RR FOG LP | Not Used (Relay) |
| SPARE 3 | Not Used |
| IN ADV PWR | Interior Lights Feed |
| CTSYLP | Courtesy Lamps |
| CEL PHONE | Cellular Telephone Wiring |
2002 GMC sierra Under Hood Fuse and Relay box location
The fusebox is located in the engine compartment, on the driver’s side of the vehicle.
2002 GMC Sierra Under Hood Fuse Box Layout
2002 GMC Sierra under Hood Fuse and relay Box Diagram
2002 GMC Sierra under Hood Fuse Box Details
Assignment of the fuses in the Engine compartment
| Name | Usage |
|---|---|
| GLOW PLUG | Diesel Glow Plugs and Intake Air Heater |
| CUST FEED | Gasoline Accessory Power |
| STUD #1 | Accessory Power/Trailer Wiring Feed |
| ABS | Anti-Lock Brakes |
| IGN A | Ignition Switch |
| AIR | A I R System |
| RAP #1 | Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s) |
| IGNB | Ignition Switch |
| RAP #2 | Not Used |
| STUD #2 | Accessory Power/Trailer Wiring Brake Feed |
| SPARE | Spare Fuse |
| TRLR TRN | Right Turn Signal Trailer Wiring |
| TRLL TRN | Left Turn Signal Trailer Wiring |
| IGN 1 | Ignition, Fuel Controls (Relay) |
| INJ B | Ignition, Fuel Controls |
| STARTER | Starter (Relay) |
| PARK LP | Parking Lamps |
| FRT HVAC | Climate Control System |
| STOP LP | Exterior Lamps, Stoplamps |
| ECM I | PCM |
| ECMRPV | Fuel Controls, ECM |
| CHMSL | Center High Mounted Stoplamp |
| VEH STOP | Stoplamps, Cruise Control |
| TRL B/U | Backup Lamps Trailer Wiring |
| INJ A | Fuel Controls, Ignition |
| RR HVAC | Not Used |
| VEH B/U | Vehicle Backup Lamps |
| ENG 1 | Engine Controls, Canister Purge, Fuel System |
| ETC | Electronic Throttle Control |
| IGNE | A/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A I R. System |
| B/U LP | Backup Lamps, Automatic Transmission Shift Lock Control System |
| ATC | Automatic Transfer Case |
| RR DEFOG | Rear Window Defogger, Heated Mirrors (Relay) |
| RR PRK | Right Rear Parking Lamps |
| ECMB | PCM |
| F/PMP | Fuel Pump (Relay) |
| O2 A | Oxygen Sensors |
| FUEL HT | Fuel Heater, Glow Plug and Intake Heater Controls |
| O2 B | Oxygen Sensors |
| LR PRK | Left Rear Parking Lamps |
| RR DEFOG | Rear Window Defogger, Heated Mirors |
| HDLP | Headlamps (Relay) |
| TRL PRK | Parking Lamps Trailer Wiring |
| RT HDLP | Right Headlamps |
| DRL | Daytime Running Lamps (Relay) |
| HTD MIR | Heated Mirrors |
| LT HDLP | Left Headlamps |
| A/C | Air Conditioning |
| AUX PWR | Cigarette Lighter, Auxiliary Power Outlets |
| SEO 2 | Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp |
| SEO 1 | Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone, OnStarO |
| DRL | Daytime Running Lamps |
| A/C | A/C (Relay) |
| FOG LP | Fog Lamps |
| FOG LP | Fog Lamps (Relay) |
| RADIO | Audio System, Instrument Cluster, Climate Control System |
| CIGAR | Cigarette Lighter, Auxiliary Power Outlets |
| RT TURN | Right Turn Signals |
| BTSI | Automatic Transmission Shift Lock Control System |
| LT TURN | Left Turn Signals |
| FR PRK | Front Parking Lamps, Sidemarker Lamps |
| W/WPMP | Windshield Washer Pump |
| HORN | Horn (Relay) |
| IGNC | Ignition Switch, Fuel Pump, PRND321 Display, Crank |
| RDO AMP | Not Used |
| HAZ LP | Exterior Lamps, Hazard Lamps |
| EXP LPS | Not Used |
| HORN | Horn |
| CTSYLP | Interior Lamps |
| RRWPR | Not Used |
| TBC | Body Control Module, Remote Keyless Entry, Headlamps |
| *1 | INJ B – Gasoline Engine and Diesel Engine. |
| *2 | ECM I – Gasoline Engine; ECMRPV – Diesel Engine. |
| *3 | O2 A – Gasoline Engine; FUEL HT – Diesel Engine. |
| *4 | O2 B – Gasoline Engine; ECM l – Diesel Engine. |
Auxiliary Fuse Box(Engine Compartment)
The auxiliary electric cooling fan fuse block is located in the engine compartment on the driver’s side of the vehicle next to the underhood fuse block.
Assignment of the fuses in the Engine compartment auxiliary box
| Name | Description |
|---|---|
| COOL/FAN | Cooling Fan |
| COOL/FAN | Cooling Fan Relay Fuse |
| COOL/FAN | Cooling Fan Fuse |
| Relays | |
| COOL/FAN 1 | Cooling Fan Relay 1 |
| COOL/FAN 3 | Cooling Fan Relay 3 |
| COOL/FAN 2 | Cooling Fan Relay 2 |
WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.
