Page Contents:
In this article, you will find information about the fuses of the GMC Sierra (K2XX; models 2016, 2017, and 2018), 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 / Sierra Denali
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 (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.
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.
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
2016
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Trailer brake |
| 2 | Trailer battery |
| 3 | ABS pump |
| 4 | Instrument panel BEC 1 |
| 5 | MSB passenger |
| 6 | 4WD transfer case electronic control |
| 7 | Electronic park brake |
| 8 | Instrument panel BEC 2 |
| 9 | MSB driver |
| 10 | Rear window defogger |
| 11 | Starter |
| 12 | Cooling fan 1 |
| 13 | Cooling fan 2 |
| 14 | Left trailer stop / Turn lamps |
| 15 | Trailer parking lamps |
| 16 | Trailer reverse lamps |
| 17 | Right trailer stop / Turn lamps |
| 18 | Fuel pump |
| 19 | Integrated chassis control module |
| 20 | Electronic suspension control module |
| 21 | Fuel pump power module |
| 22 | Upfitter 1 |
| 23 | Upfitter 2 |
| 24 | Front wiper |
| 25 | ABS Valves |
| 26 | Upfitter 2 |
| 27 | Upfitter 3 |
| 28 | Right parking lamps |
| 29 | Left parking lamps |
| 30 | Upfitter 3 |
| 31 | Upfitter 4 |
| 32 | Upfitter 4 |
| 33 | Reverse lamps |
| 34 | Engine control module / lgnition |
| 35 | A/C clutch |
| 36 | Heated mirrors |
| 37 | Upfitter 1 |
| 38 | Center high-mount 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 | O2 Sensor B |
| 47 | Throttle control |
| 48 | Horn |
| 49 | Fog lamps |
| 50 | O2 Sensor A |
| 51 | Engine control module |
| 52 | Interior heater |
| 53 | Accessory power module / TPM pump |
| 54 | Front washer |
| 55 | A/C / Battery regulated voltage control |
| 56 | A/C module / Battery pack |
| 57 | Transmission control module / Engine control module |
| 58 | Headlamps |
| 59 | Fuel pump |
| 60 | Upfitter 2 |
| 61 | Upfitter 3 |
| 62 | Upfitter 4 |
| 63 | Trailer parking lamps |
| 64 | Run/Crank |
| 65 | Upfitter 1 |
| 66 | Fuel pump 2 |
| 67 | A/C control |
| 68 | Starter |
| 69 | Rear window defogger |
| 70 | Engine control module |
| 71 | Cooling fan clutch |
| 72 | CKT 95 |
| 73 | CKT 92 |
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 | - |
| 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 | - |
| 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 |
| 51 | Rear sliding window open |
| 52 | Rear sliding window close |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| 1 | Accessory power outlet 2 |
| 2 | SEO / Retained accessory power |
| 3 | Universal garage door opener / lnterior rearview mirror |
| 6 | Body control module 3 |
| 7 | Body control module 5 |
| 8 | Driver window switch / Mirror switch |
| 9 | - |
| 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 | - |
| 20 | - |
| 22 | HVAC / Auxiliary HVAC / Ignition |
| 23 | Instrument cluster / Ignition sensing diagnostic module / Ignition |
| 24 | - |
| 25 | Data link connector / Driver seat module |
| 26 | Passive entry / Passive start / HVAC |
| 27 | - |
| 28 | - |
| 29 | Park enable / Electrically adjustable pedals |
| 30 | SEO |
| 31 | Accessory / Run / Crank |
| 32 | Heated steering wheel |
| 33 | - |
| 34 | Instrument cluster |
| 36 | - |
| 37 | - |
| 38 | 4WD TREC |
| 40 | Left doors |
| 41 | Driver power seat |
| 43 | Left heated, cooled or ventilated seats (if equipped) |
| 44 | Right heated, cooled or ventilated seats (if equipped) |
| 45 | - |
| 49 | Retained accessory power |
| 50 | Run/Crank |
2017
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Trailer brake |
| 2 | Trailer battery |
| 3 | ABS pump |
| 4 | Instrument panel BEC 1 |
| 5 | MSB passenger |
| 6 | 4WD transfer case electronic control |
| 7 | Electric park brake |
| 8 | Instrument panel BEC 2 |
| 9 | MSB driver |
| 10 | Rear window defogger |
| 11 | Starter |
| 12 | Cooling fan 1 |
| 13 | Cooling fan 2 |
| 14 | Left trailer stop / Turn lamps |
| 15 | Trailer parking lamps |
| 16 | Trailer reverse lamps |
| 17 | Right trailer stop / Turn lamps |
| 18 | Fuel pump |
| 19 | Integrated chassis control module |
| 20 | Electronic suspension control module |
| 21 | Fuel pump power module |
| 22 | Upfitter 1 |
| 23 | Upfitter 2 |
| 24 | Front wiper |
| 25 | ABS Valves |
| 26 | Upfitter 2 |
| 27 | Upfitter 3 |
| 28 | Right parking lamps |
| 29 | Left parking lamps |
| 30 | Upfitter 3 |
| 31 | Upfitter 4 |
| 32 | Upfitter 4 |
| 33 | Reverse lamps |
| 34 | Engine control module / lgnition |
| 35 | A/C 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 | O2 Sensor B |
| 47 | Throttle control |
| 48 | Horn |
| 49 | Fog lamps |
| 50 | O2 Sensor A |
| 51 | Engine control module |
| 52 | Interior heater |
| 53 | Accessory power module / TPM pump |
| 54 | Front washer |
| 55 | A/C / Battery regulated voltage control |
| 56 | A/C module / Battery pack |
| 57 | Transmission control module / Engine control module |
| 58 | Headlamps |
| 74 | Electric running boards (if equipped) |
| 76 | Fuel pump prime |
| 59 | Fuel pump |
| 60 | Upfitter 2 |
| 61 | Upfitter 3 |
| 62 | Upfitter4 |
| 63 | Trailer parking lamps |
| 64 | Run/Crank |
| 65 | Upfitter 1 |
| 66 | Fuel pump 2 |
| 67 | A/C control |
| 68 | Starter |
| 69 | Rear window defogger |
| 70 | Engine control module |
| 71 | Cooling fan clutch |
| 72 | CKT95 |
| 73 | CKT 92 |
| 75 | Fuel pump prime |
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 | - |
| 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 | - |
| 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 |
| 51 | Rear sliding window open |
| 52 | Rear sliding window close |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| 1 | Accessory power outlet 2 |
| 2 | SEO / Retained accessory power |
| 3 | Universal garage door opener / lnterior rearview mirror |
| 6 | Body control module 3 |
| 7 | Body control module 5 |
| 8 | Driver window switch / Mirror switch |
| 9 | - |
| 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 | - |
| 20 | - |
| 22 | HVAC / Auxiliary HVAC / Ignition |
| 23 | Instrument cluster / Ignition sensing diagnostic module / Ignition |
| 24 | - |
| 25 | Data link connector / Driver seat module |
| 26 | Passive entry / Passive start / HVAC |
| 27 | - |
| 28 | - |
| 29 | Park enable / Electrically adjustable pedals |
| 30 | SEO |
| 31 | Accessory / Run/Crank |
| 32 | Heated steering wheel |
| 33 | - |
| 34 | Instrument cluster |
| 36 | - |
| 37 | - |
| 38 | 4WD TREC |
| 40 | Left doors |
| 41 | Driver power seat |
| 43 | Left heated, cooled or ventilated seats (if equipped) |
| 44 | Right heated, cooled or ventilated seats (if equipped) |
| 45 | - |
| 49 | Retained accessory power |
| 50 | Run/Crank |
2018
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 1 | Trailer brake |
| 2 | Trailer battery |
| 3 | ABS pump |
| 4 | Instrument panel BEC 1 |
| 5 | MSB passenger |
| 6 | 4WD transfer case electronic control |
| 7 | Electric park brake |
| 8 | Instrument panel BEC 2 |
| 9 | MSB driver |
| 10 | Rear window defogger |
| 11 | Starter |
| 12 | Cooling fan 1 |
| 13 | Cooling fan 2 |
| 14 | Left trailer stop/Turn lamps |
| 15 | Trailer parking lamps |
| 16 | Trailer reverse lamps |
| 17 | Right trailer stop/Turn lamps |
| 18 | Fuel pump |
| 19 | Integrated chassis control module |
| 20 | Electronic suspension control module |
| 21 | Fuel pump power module |
| 22 | Upfitter 1 |
| 23 | Upfitter 2 |
| 24 | Front wiper |
| 25 | ABS Valves |
| 26 | Upfitter 2 |
| 27 | Upfitter 3 |
| 28 | Right parking lamps |
| 29 | Left parking lamps |
| 30 | Upfitter 3 |
| 31 | Upfitter 4 |
| 32 | Upfitter 4 |
| 33 | Reverse lamps |
| 34 | Engine control module / lgnition |
| 35 | A/C 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 | O2 Sensor B |
| 47 | Throttle control |
| 48 | Horn |
| 49 | Fog lamps |
| 50 | O2 Sensor A |
| 51 | Engine control module |
| 52 | Interior heater |
| 53 | Accessory power module / TPM pump |
| 54 | Front washer |
| 55 | A/C / Battery regulated voltage control |
| 56 | A/C module / Battery pack |
| 57 | Transmission control module / Engine control module |
| 58 | Headlamps |
| 74 | Electric running boards (if equipped) |
| 76 | Fuel pump prime |
| 59 | Fuel pump |
| 60 | Upfitter 2 |
| 61 | Upfitter 3 |
| 62 | Upfitter4 |
| 63 | Trailer parking lamps |
| 64 | Run/Crank |
| 65 | Upfitter 1 |
| 66 | Fuel pump 2 |
| 67 | A/C control |
| 68 | Starter |
| 69 | Rear window defogger |
| 70 | Engine control module |
| 71 | Cooling fan clutch |
| 72 | CKT95 |
| 73 | CKT 92 |
| 75 | Fuel pump prime |
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 | - |
| 20 | Sunroof |
| 23 | Airbag / lnfo |
| 26 | Export / Power take off / Special equipment option / Battery 1 |
| 27 | Obstacle detection / USB ports |
| 28 | Body control module 2 |
| 32 | Special equipment option / Battery 2 |
| 35 | Air conditioning inverter |
| 36 | Amplifier |
| 37 | Battery system |
| 39 | Rear sliding window |
| 42 | Right door window motor |
| 43 | Front blower |
| 44 | Special equipment option |
| 45 | Body control module 6 |
| 46 | Body control module 7 |
| 47 | Passenger seat |
| 50 | Retained accessory power |
| 51 | Rear sliding window open |
| 52 | Rear sliding window close |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| 1 | Accessory power outlet 2 |
| 2 | Special equipment option / Retained accessory power |
| 3 | Universal remote system / lnterior rearview mirror |
| 6 | Body control module 3 |
| 7 | Body control module 5 |
| 8 | Driver window switch / Mirror switch |
| 9 | - |
| 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 | - |
| 20 | - |
| 22 | Heating, ventilation, and air conditioning / Auxiliary heating, ventilation, and air conditioning / lgnition |
| 23 | Instrument cluster / Ignition sensing diagnostic module / Ignition |
| 24 | - |
| 25 | Data link connector / Driver seat module |
| 26 | Passive entry / Passive start / Heating, ventilation, and air conditioning |
| 27 | - |
| 28 | - |
| 29 | Park enable / Electrically adjustable pedals |
| 30 | Special equipment option |
| 31 | Accessory / Run/Crank |
| 32 | Heated steering wheel |
| 33 | - |
| 34 | Instrument cluster |
| 36 | - |
| 37 | - |
| 38 | 4WD transfer case electronic control |
| 40 | Left doors |
| 41 | Driver power seat |
| 43 | Left heated, cooled or ventilated seats (if equipped) |
| 44 | Right heated, cooled or ventilated seats (if equipped) |
| 45 | - |
| 49 | Retained accessory power |
| 50 | Run/Crank |