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In this article, you will find information about the fuses of the GMC Sierra (K2XX; models 2014 and 2015), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in GMC Sierra
The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse.
Caution!
- Be sure you replace a bad fuse with a new one of the identical size and rating.
- Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
Location of Fuse Boxes
Engine Compartment Fuse Block:
The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle.
Instrument Panel Fuse Block (Left):
The left instrument panel fuse block access door is on the driver side edge of the instrument panel. Pull off the cover to access the fuse block.
Instrument Panel Fuse Block (Right):
The right instrument panel fuse block access door is on the passenger side edge of the instrument panel. Pull off the cover to access the fuse block.
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart.
Fuse Box Diagrams
2014
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Trailer Brake |
| 2 | Trailer Battery |
| 3 | Antilock Brake System Pump |
| 4 | Instrument Panel BEC 1 |
| 5 | Spare |
| 6 | 4WD Tree |
| 7 | Spare |
| 8 | Instrument Panel BEC 2 |
| 9 | Spare |
| 10 | Rear Window Defogger |
| 11 | Starter |
| 12 | Cooling Fan 1 |
| 13 | Cooling Fan 2 |
| 14 | Trailer Stop / Turn Lamps, Left |
| 15 | Trailer Park Lamps |
| 16 | Trailer Back-up Lamp |
| 17 | Trailer Stop / Turn Lamps, Right |
| 18 | Fuel Pump |
| 19 | Integrated Chassis Control Module |
| 20 | Electronic Suspension Control Module |
| 21 | Fuel Pump Power Module |
| 22 | Upfitter Switch 1 |
| 23 | Upfitter 2 |
| 24 | Front Wiper |
| 25 | Antilock Brake System Valves |
| 26 | Upfitter SW 2 |
| 27 | Upfitter SW 3 |
| 28 | Parking Lamps, Right |
| 29 | Parking Lamps, Left |
| 30 | Upfitter 3 |
| 31 | Upfitter SW 4 |
| 32 | Upfitter 4 |
| 33 | Back-up Lamps |
| 34 | Engine Control Module Ignition |
| 35 | Air Conditioning Compressor Clutch |
| 36 | Heated Mirrors |
| 37 | Upfitter 1 |
| 38 | Center High-Mounted Stoplamp |
| 39 | Miscellaneous Ignition |
| 40 | Transmission Ignition |
| 41 | Fuel Pump 2 |
| 42 | Cooling Fan Clutch |
| 43 | Engine |
| 44 | Fuel Injectors A, Odd |
| 45 | Fuel Injectors B, Even |
| 46 | Oxygen Sensor B |
| 47 | Throttle Control |
| 48 | Horn |
| 49 | Fog Lamp |
| 50 | Oxygen Sensor A |
| 51 | Engine Control Module |
| 52 | Interior Heater |
| 53 | Spare |
| 54 | Aerosh utter |
| 55 | Front Washer |
| 56 | Air Conditioning Compressor / Battery Regulated Voltage Control |
| 57 | Air Conditioning Compressor Module / Battery Pack |
| 58 | Transmission Control Module / Engine Control Module |
| 59 | Headlamps |
| 60 | Fuel Pump |
| 61 | Upfitter 2 |
| 62 | Upfitter 3 |
| 63 | Upfitter 4 |
| 64 | Trailer Park Lamps |
| 65 | Run/Crank |
| 66 | Upfitter 1 |
| 67 | Fuel Pump 2 |
| 68 | Air Conditioning Control |
| 69 | Starter |
| 70 | Rear Window Defogger |
| 71 | Engine Control Module |
| 72 | Cooling Fan Clutch |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| 1 | Accessory Power Outlet 2 |
| 2 | SEO Retained Accessory Power |
| 3 | Universal Garage Door Opener / lnside Rearview Mirror |
| 6 | Body Control Module 3 |
| 7 | Body Control Module 5 |
| 8 | Driver Window Switch / Mirror Switch |
| 9 | Body Control Module 7 |
| 10 | Accessory Power Outlet Retained Accessory Power |
| 11 | Accessory Power Outlet Battery |
| 12 | Retained Accessory Power / Accessory |
| 13 | Discrete Logic Ignition Switch |
| 14 | Switch Backlighting |
| 17 | Body Control Module 1 |
| 19 | Spare |
| 20 | Spare |
| 22 | Heater, Ventilation and Air Conditioning / Auxiliary Heater, Ventilation and Air Conditioning Ignition |
| 23 | Instrument Cluster Ignition/Sensing Diagnostic Module Ignition |
| 24 | Spare |
| 25 | Airbag/lnfo |
| 26 | Passive Entry Passive Start / Heater, Ventilation and Air Conditioning |
| 27 | Spare |
| 28 | Spare |
| 29 | Park Enable / Electrically Adjustable Pedals |
| 30 | SEO |
| 31 | Accessory / Run Crank |
| 32 | Heated Steering Wheel |
| 33 | Spare |
| 34 | Instrument Cluster |
| 36 | Spare |
| 37 | Spare |
| 40 | Left Doors |
| 41 | Driver Power Seat |
| 43 | Left Front Heated / Cooled Seat |
| 44 | Amplifier |
| 45 | Spare |
| 49 | Accessory Power Outlet 1 / Cigarette Lighter |
| 50 | Run/Crank |
Instrument Panel Fuse Block (Right)
| № | Usage |
|---|---|
| 1 | Accessory Power Outlet 3 |
| 2 | Accessory Power Outlet 4 |
| 7 | Body Control Module 4 |
| 8 | Body Control Module 8 |
| 9 | Rear Seat Entertainment |
| 10 | Cargo Lamp |
| 15 | Steering Wheel Controls |
| 18 | Radio |
| 19 | Spare |
| 20 | Sunroof |
| 23 | Data Link Connector / Driver Seat Module |
| 26 | Export / Power Take Off / SEO Battery 1 |
| 27 | Obstacle Detection / USB Ports |
| 28 | Body Control Module 2 |
| 32 | SEO Battery 2 |
| 35 | AC Inverter |
| 36 | Right Front Heated / Cooled Seat |
| 37 | Spare |
| 39 | Rear Sliding Window |
| 42 | Right Door Window Motor |
| 43 | Front Blower |
| 44 | TPIM2 / SEO |
| 45 | Body Control Module 6 |
| 46 | Spare |
| 47 | Passenger Seat |
| 50 | Retained Accessory Power / Accessory |
| 51 | Rear Sliding Window Open |
| 52 | Rear Sliding Window Close |
2015
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Trailer Brake |
| 2 | Trailer Battery |
| 3 | Antilock Brake System Pump |
| 4 | Instrument Panel BEC 1 |
| 5 | Spare |
| 6 | 4WD Tree |
| 7 | Spare |
| 8 | Instrument Panel BEC 2 |
| 9 | Spare |
| 10 | Rear Window Defogger |
| 11 | Starter |
| 12 | Cooling Fan 1 |
| 13 | Cooling Fan 2 |
| 14 | Trailer Stop / Turn Lamps, Left |
| 15 | Trailer Parking Lamps |
| 16 | Trailer Back-up Lamp |
| 17 | Trailer Stop / Turn Lamps, Right |
| 18 | Fuel Pump |
| 19 | Integrated Chassis Control Module |
| 20 | Electronic Suspension Control Module |
| 21 | Fuel Pump Power Module |
| 22 | Upfitter Switch 1 |
| 23 | Upfitter 2 |
| 24 | Front Wiper |
| 25 | Antilock Brake System Valves |
| 26 | Upfitter SW 2 |
| 27 | Upfitter SW 3 |
| 28 | Parking Lamps, Right |
| 29 | Parking Lamps, Left |
| 30 | Upfitter 3 |
| 31 | Upfitter SW 4 |
| 32 | Upfitter 4 |
| 33 | Back-up Lamps |
| 34 | Engine Control Module Ignition |
| 35 | Air Conditioning Compressor Clutch |
| 36 | Heated Mirrors |
| 37 | Upfitter 1 |
| 38 | Center High-Mounted Stoplamp |
| 39 | Miscellaneous Ignition |
| 40 | Transmission Ignition |
| 41 | Fuel Pump 2 |
| 42 | Cooling Fan Clutch |
| 43 | Engine |
| 44 | Fuel Injectors A, Odd |
| 45 | Fuel Injectors B, Even |
| 46 | Oxygen Sensor B |
| 47 | Throttle Control |
| 48 | Horn |
| 49 | Fog Lamp |
| 50 | Oxygen Sensor A |
| 51 | Engine Control Module |
| 52 | Interior Heater |
| 53 | Spare |
| 54 | Aerosh utter |
| 55 | Front Washer |
| 56 | Air Conditioning Compressor / Battery Regulated Voltage Control |
| 57 | Air Conditioning Compressor Module / Battery Pack |
| 58 | Transmission Control Module / Engine Control Module |
| 59 | Headlamps |
| 60 | Fuel Pump |
| 61 | Upfitter 2 |
| 62 | Upfitter 3 |
| 63 | Upfitter 4 |
| 64 | Trailer Parking Lamps |
| 65 | Run/Crank |
| 66 | Upfitter 1 |
| 67 | Fuel Pump 2 |
| 68 | Air Conditioning Control |
| 69 | Starter |
| 70 | Rear Window Defogger |
| 71 | Engine Control Module |
| 72 | Cooling Fan Clutch |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| 1 | Accessory Power Outlet 2 |
| 2 | SEO Retained Accessory Power |
| 3 | Universal Garage Door Opener / lnside Rearview Mirror |
| 6 | Body Control Module 3 |
| 7 | Body Control Module 5 |
| 8 | Driver Window Switch / Mirror Switch |
| 9 | Spare |
| 10 | Accessory Power Outlet Retained Accessory Power |
| 11 | Accessory Power Outlet Battery |
| 12 | Accessory Power Outlet 1 / Cigarette Lighter |
| 13 | Discrete Logic Ignition Switch |
| 14 | Switch Backlighting |
| 17 | Body Control Module 1 |
| 19 | Spare |
| 20 | Spare |
| 22 | Heater, Ventilation, and Air Conditioning / Auxiliary Heater, Ventilation and Air Conditioning Ignition |
| 23 | Instrument Cluster Ignition / Sensing Diagnostic Module Ignition |
| 24 | Spare |
| 25 | Data Link Connector / Driver Seat Module |
| 26 | Passive Entry Passive Start / Heater, Ventilation, and Air Conditioning |
| 27 | Spare |
| 28 | Spare |
| 29 | Park Enable / Electrically Adjustable Pedals |
| 30 | SEO |
| 31 | Accessory / Run Crank |
| 32 | Heated Steering Wheel |
| 33 | Spare |
| 34 | Instrument Cluster |
| 36 | Spare |
| 37 | Spare |
| 40 | Left Doors |
| 41 | Driver Power Seat |
| 43 | Left Front Heated / Cooled Seat |
| 44 | Right Front Heated / Cooled Seats |
| 45 | Spare |
| 49 | Retained Accessory Power / Accessory |
| 50 | Run/Crank |
Instrument Panel Fuse Block (Right)
| № | Usage |
|---|---|
| 1 | Accessory Power Outlet 3 |
| 2 | Accessory Power Outlet 4 |
| 7 | Body Control Module 4 |
| 8 | Body Control Module 8 |
| 9 | Rear Seat Entertainment |
| 10 | Cargo Lamp |
| 15 | Steering Wheel Controls |
| 18 | Radio |
| 19 | Spare |
| 20 | Sunroof |
| 23 | Airbag / lnfo |
| 26 | Export / Power Take Off / SEO Battery 1 |
| 27 | Obstacle Detection / USB Ports |
| 28 | Body Control Module 2 |
| 32 | SEO Battery 2 |
| 35 | AC Inverter |
| 36 | Amplifier |
| 37 | Spare |
| 39 | Rear Sliding Window |
| 42 | Right Door Window Motor |
| 43 | Front Blower |
| 44 | SEO |
| 45 | Body Control Module 6 |
| 46 | Body Control Module 7 |
| 47 | Passenger Seat |
| 50 | Retained Accessory Power / Accessory |
| 51 | Rear Sliding Window Open |
| 52 | Rear Sliding Window Close |