Jonathan Yarden Oct 06, 2021 · 5 min. read
In this article you will find a description of fuses and relays GMC,
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: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
Instrument Panel Circuit Breaker Block
This fuse block is in the lower portion of the instrument panel, to the left of the steering column.
| Name | Circuits protected |
| HYD BRK | Brake Pump Motor Relay |
| HYD BRK | Brake Alarm Module |
| B/U IGN3 | Fuel Filter Relay, Blower Motor Relays, ABS Power Relay, Back-Up Lamps, Auxiliary Wiring Relay, IGN 3 Relay, Power Window Relay, Vehicle Interface Module, Transmission Temperature Gage |
| STOP | Stoplamps |
| WASH/WIPE | Windshield Wipers/Washer, Accessory Relay |
| DOME/PNL | Dome Lamp, Radio Receiver, Instrument Panel Lights, A/C Controller, Headlamp/Seatbelt Module |
| BLOWER | Blower Motor |
| A/C | A/C Clutch Compressor, A/C Controller |
| TRN/HAZ | Turn Signals, Hazard Flashers |
| CHAS | Exhaust Brake, Air Suspension Dump Valve, Air Dryer, HYD ABS ECHU |
| PARK LP | Auxiliary Wiring, Air Conditioner Controls, Parking Lamps, Turn Signals, Taillamps, Stoplamps, Marker Lamps, Trailer Running Lamps, Lighted Mirrors, Radio Receiver, Mirror Clearance Lamps |
| HORN | Horn/Diagnostic Connector |
| PRK BRK | Parking Brake Module |
| FUEL | Heated Fuel Filter (Diesel Engines) or Fuel Pump (Gasoline Engines) |
| AXLE | Heated Mirrors, Radiator Shutters, Two-Speed Axle Motor, Two-Speed Axle Switch |
| MRKR LP | Roof Marker Lamps, Trailer Marker Lamps, Marker Lamp Relay |
| CIG/AUX | Cigarette Lighter, Auxiliary Power Jacks |
| AUX | Auxiliary Wiring Relay |
| IGN RLY/VIN | Vehicle Interface Module (Diesel Engines) or Generator, Coil, Injectors (Gasoline Engines) |
| WDO | Power Windows |
| CRNK | Starter Relay |
| IGN SW | Instrument Panel Cluster Telltales |
| AUX | Auxiliary Wiring |
| RDO | Radio, Auxiliary Wiring |
| DR LK | Power Door Locks |
Maxi-Fuse Block
| Name | Circuits/Circuit Breakers Protected |
| STP/HAZ TURN | Stop Lamp, Turn Signal/Hazard Lights, Fuel, Ignition Relay (Gasoline Engines) |
| IGN SW3 | Air Conditioner, Ignition Switch, Axle, Chassis |
| INT/EXT LIGHTS | Parking Lamps, Dome/Panel Lights |
| HEAD LAMP | Headlamps, Daytime Running Lamps |
| AUX WRG | Auxiliary, Park Brake |
| IGN SW1 | Ignition Switch, Wash/Wipe, Crank, Radio |
| HYD PUMP | Hydraulic Brake, Brake Pump Motor |
| HYD ABS | EHCU |
| PWR WDO/LCKS | Window, Door Locks |
| PARK BRK | Parking Brake Motor |
| BLOWER HORN | Blower, Horn, Cigarette Lighter/Auxiliary |
| FUEL/ENGINE | Empty |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Still have questions or want to supplement the article? Discuss On Telegram