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.
Instrument Panel Fuse Block
The instrument panel fuse block is located under the instrument panel on the passenger side of the vehicle.
Fuse side
Fuses | Usage |
FRT/WSW | Front Windshield Wipe |
SPARE | Spare |
HTD/SEAT | Front Heated Seats |
STR/WHL/ILLUM | Steering Wheel Illumination |
MSM | Memory Seat Module |
PWR/MIRRORS | Power Mirrors |
DR/LCK | Door Locks |
AIRBAG | Airbag System |
LT/TRN/SIG | Driverâs Side Turn Signal |
REAR WIPER | Rear Window Wiper |
PWR MOD | PassKey Module, Body Control Module |
BCK/UP/STOP | Back-up Lamps, Stoplamps |
HVAC | Climate Control System |
DISPLAY | Display |
RT/TRN/SIG | Passengerâs Side Turn Signal |
DRL* | Daytime Running Lamps |
RADIO | Radio |
PDM | Power Mirrors, Liftgate Release |
DRL 2** | Infotainment System |
INFOTAINMENT | Infotainment System |
BCM | Body Control Module |
SPARE | Spare |
CTSY | Dome Lamps |
INADV/PWR/LED | Interior Lamps |
ONSTR/VENT | Emissions |
AMP | Audio Amplifier |
Relay side
Relays | Usage |
LT/PWR/SEAT | Driverâs Side Power Seat Relay |
RT/PWR/SEAT | Passengerâs Side Power Seat Relay |
PWR/WNDW | Power Windows Relay |
PWR/COLUMN | Power Steering Column Relay |
L/GATE | Liftgate Relay |
LCK | Power Lock Relay |
REAR/WSW | Rear Window Washer Relay |
UNLCK | Power Unlock Relay |
DRL2 | Daytime Running Lamps 2 Relay |
LT/UNLCK | Driverâs Side Unlock Relay |
DRL | Daytime Running Lamps Relay |
SPARE | Spare |
FRT/WSW | Front Windshield Washer Relay |
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Underhood Fuse Block
The underhood fuse block is located in the engine compartment, on the passengerâs side of the vehicle.
Fuses | Usage |
LT PRK | Left Parking Lamp |
RT PRK | Right Parking Lamp |
TRLR PRKÂ LAMP | Trailer Parking Lamps |
AIRBAG | Airbag System |
PCM IGN | Powertrain Control Module Ignition |
AFS | Adaptive Forward Lighting System |
TRANS | Transmission |
REARÂ CAMERA | Rear Camera |
EMISSION 1 | Antilock Brakes System 2 |
TRLR BRK | Trailer Brake |
AWD | All-Wheel-Drive System |
TRLR PWR | Trailer Power |
EVEN COILS | Even Injector Coils |
RR HVAC | Rear Climate Control System |
SPARE | Spare |
ODD COILS | Odd Injector Coils |
SPARE | Spare |
LT HI BEAM | Left High-Beam Headlamp |
SPARE | Spare |
LT TRLR STOP/TRN | Trailer Left Stoplamp and Turn Signal |
EMISSION 2 | Emission 2 |
ECM | Engine Control Module |
RT HI BEAM | Right High-Beam Headlamp |
RVC SNSR | Regulated Voltage Control Sensor |
RT TRLR STOP/TRN | Trailer Right Stoplamp and Turn Signal |
ECM 1 | Engine Control Module 1 |
SPARE | Spare |
WPR/WSW | Windshield Wiper/Washer |
SPARE | Spare |
PWR OUTLET | Power Outlet |
AUX POWER | Auxiliary Power |
RT LO BEAM | Right Low-Beam Headlamp |
RR APO | Rear Accessory Power Outlet |
LT LO BEAM | Left Low-Beam Headlamp |
TCM | Transmission Control Module |
TRLR BCK/UP | Trailer Back-up Lamps |
HTD MIR | Heated Outside Rearview Mirror |
ABS MTR | Antilock Brake System Motor |
FOG LAMP | Fog Lamps |
HORN | Horn |
A/C CLTCH | Air Conditioning Clutch |
FUEL PUMP | Fuel Pump |
SPARE | Spare |
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J-Case Fuses | Usage |
FAN 2 | Cooling Fan 2 |
PWR L/GATE | Power Liftgate |
FAN 1 | Cooling Fan 1 |
HVAC BLWR | Climate Control System Blower |
STRTR | Starter |
BATT 2 | Battery 2 |
HTD WASH | Heated Windshield Washer System |
BATT 1 | Battery 1 |
BATT 3 | Battery 3 |
ABS MTR | Antilock Brake System Motor |
RR DEFOG | Rear Defogger |
S/ROOF/SUNSHADE | Sunroof, Sunshade |
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Relays | Usage |
FAN 3 | Cooling Fan 3 |
FAN 2 | Cooling Fan 2 |
PRK LAMP | Park Lamp |
FAN 1 | Cooling Fan 1 |
RT TRLR STOP/TRN | Trailer Right Stoplamp and Turn Signal |
LT TRLR STOP/TRN | Trailer Left Stoplamp and Turn Signal |
IGN | Ignition Main |
CRNK | Switched Power |
PWR/TRN | Powertrain |
HI BEAM | High-Beam Headlamps |
WPR | Windshield Wiper |
WPR HI | Windshield Wiper High Speed |
RR DEFOG | Rear Window Defogger |
HID/LO BEAM | High Intensity Discharge (HID)Â Low-Beam Headlamps |
SPARE | Spare |
FOG LAMP | Fog Lamps |
HORN | Horn |
A/C CMPRSRÂ CLTCH | Air Conditioning Compressor Clutch |
FUEL PUMP | Fuel Pump |
TRLR BCK/UP | Trailer Back-up Lamps |
WARNING:Â Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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