GMC C-Series mk2 (Second Generation; 2001 – 2002) – fuse box diagram
Year of production: 2001, 2002
Instrument Panel Circuit Breaker Block
This fuse block is in the lower portion of the instrument panel, to the left of the steering column.
7.2L and 8.1L Fuse block
| Name | Circuits protected |
| HYD BRK | Brake Pump Motor Relay, Alarm Module |
| ENG1 | Engine Control Module (Diesel Engines), Canister Purge, Electronic Throttle Control, Mass Air Flow, Engine Control Module (Gasoline Engines), Transmission Shift Solenoid (Gasoline Engines) |
| 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, Stoplamp Relay |
| WASH/WIPE | Windshield Wipers/Washer, Accessory Relay |
| DOME/PNL | Dome Lamp, Radio, Lighting Relay, Instrument Panel Lights, A/C Controller, Headlamp/Seatbelt Module |
| BLOWER | Blower Motor |
| A/C | A/C Clutch Compressor, A/C Controller, A/C Clutch Relay |
| TRN/HAZ | Turn Signals, Hazard Flashers |
| CHAS | Exhaust Brake, Air Suspension Dump Valve, Air Dryer, HYD ABS ECU, Dual Fuel Tank Module, Auxiliary Fuel Pump |
| PARK LP | Auxiliary Wiring, Parking Lamps, Taillamps, Marker Lamps, Trailer Running Lamps, Lighted Mirrors |
| HORN | Horn/Diagnostic Connector |
| PRK BRK | Parking Brake Module, Parking Brake Solenoid |
| 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-BATT | Auxiliary Wiring (Battery) |
| DR LK/WDO | Power Windows, Power Door Locks |
| ENG2 | Ignition Coils (Even), Fuel Injectors Even Bank (Gasoline Engines), Vehicle Interface Module-Battery (Diesel Engines), Transmission Control Module-Battery (Diesel Engines) |
| CRNK | Starter Relay, Ether Start (Diesel Engines) |
| IGN SW | Instrument Panel Cluster Telltales, Daytime Running Lamp Module, Daytime Running Lamp Relay, Alarm Module, Ignition 1 Relay, Vehicle Interface Module (Diesel Engines), Parking Brake Module, Transmission Relay Coil |
| AUX-IGN | Auxiliary Wiring (Ignition) |
| RDO | Radio, Auxiliary Wiring |
| ENG3 | Ignition Coils (Odd), Fuel Injectors Odd Bank (Gasoline Engines), Transmission Control Module (Diesel Engines), Transmission Shift Solenoid (Diesel Engines) |
Alternate 7.2L Fuse block
| Name | Circuits protected |
| HYD BRK | Brake Pump Motor Relay, Alarm Module |
| ENG1 | Engine Control Module (Diesel Engines), Canister Purge, Oxygen Sensors (Gasoline Engines) |
| 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, Stoplamp Relay |
| WASH/WIPE | Windshield Wipers/Washer, Accessory Relay |
| DOME/PNL | Dome Lamp, Radio Lighting Relay, Instrument Panel Lights, A/C Controller, Headlamp/Seatbelt Module, Engine Control Module (Gasoline Engines) |
| BLOWER | Blower Motor |
| A/C | A/C Clutch Compressor, A/C Controller, A/C Clutch Relay |
| TRN/HAZ | Turn Signal Lamps, Hazard Lamps |
| CHAS | Exhaust Brake, Air Suspension Dump Valve, Air Dryer, HYD ABS ECU, Dual Fuel Tank Module, Auxiliary Fuel Pump |
| ENG2 | Ignition Coils, Fuel Injectors Even Bank (Gasoline Engines) |
| PARK LP | Auxiliary Wiring, Parking Lamps, Taillamps, Marker Lamps, Trailer Running Lamps, Lighted Mirrors |
| HORN | Horn/Diagnostic Connector |
| PRK BRK | Parking Brake Module, Parking Brake Solenoid |
| 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-B | Auxiliary Wiring (Battery) |
| IGN RLY/VIM | Vehicle Interface Module (Diesel Engines), Mass Air Flow, Engine Control Module, Electronic Throttle Control (Gasoline Engines) |
| WDO | Power Windows |
| ENG3 | Ignition Coils, Fuel Injectors Odd Bank (Gasoline Engines) |
| CRNK | Starter Relay, Ether Start (Diesel Engines) |
| IGN SW | Instrument Panel Cluster Telltales, Daytime Running Lamp Module, Daytime Running Lamp Relay, Alarm Module, Ignition 1 Relay |
| AUX-I | Auxiliary Wiring (Ignition) |
| RDO | Radio, Auxiliary Wiring |
| DR LK | Power Door Locks |
Maxi-Fuse Block
With air brakes
With hydraulic brakes
| Name | Circuits/Circuit Breakers Protected |
| STP/HAZ TURN | Stoplamp, Turn Signal/Hazard Lights, Fuel |
| IGN SW3 | Air Conditioner, Ignition Switch, Axle, Chassis, Ignition Relay |
| INT/EXT LIGHTS | Parking Lamps, Dome/Panel Lights, Marker Lamps |
| HEAD LAMP | Headlamps, Daytime Running Lamps |
| AUX WRG | Auxiliary, Parking Brake |
| IGN SW1 | Ignition Switch, Wash/Wipe, Crank, Radio |
| HYD PUMP | Hydraulic Brake, Brake Pump Motor |
| HYD ABS | Hydraulic ABS |
| AIR ABS | Air ABS, ABS Power Relay, Trailer Wiring |
| PWR WDO/LCKS | Window, Door Locks |
| PARK BRK | Parking Brake Motor |
| TRLR | Trailer |
| BLOWER HORN | Blower, Horn, Cigarette Lighter/Auxiliary |
| FUEL/ENGINE | Ignition Coils, Fuel Injectors (Gasoline Engines), Transmission Control Module (Diesel Engines), Engine Controls |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.