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GMC C-Series mk2 (Second Generation; 2001 - 2002) - fuse box diagram

avatar Jonathan Yarden Mar 25, 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: 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

GMC C-Series mk2 - fuse box - instrument panel (7.2L)

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

GMC C-Series mk2 - fuse box - instrument panel (alternate-72l)

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

GMC C-Series mk2 - fuse box - maxi fuse block (with air brakes)

With hydraulic brakes

GMC C-Series mk2 - fuse box - maxi fuse block (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.

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