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: 2018
Engine Compartment Fuse Block
The underhood fuse block is in the engine compartment, on the driver side of the vehicle.
| Fuses | Usage |
| F1 | Antilock brake system |
| F2 | Starter 1 |
| F3 | DC DCÂ transformer 1 |
| F4 | â |
| F5 | â |
| F6 | â |
| F7 | DC DCÂ transformer 2 |
| F8 | Starter 3 |
| F9 | â |
| F10 | â |
| F11 | â |
| F12 | Front wiper |
| F13 | Starter 2 |
| F14 | LED/Automatic headlamp leveling |
| F15 | Rear wiper 1 |
| F16 | â |
| F17 | â |
| F18 | Automatic headlamp leveling module |
| F19 | â |
| F20 | â |
| F21 | â |
| F22 | Electronic brake control module |
| F23 | Parking/Trailer lamp |
| F24 | Right trailer stoplamp/Turn signal lamp |
| F25 | Steering column lock |
| F26 | â |
| F27 | Left trailer stoplamp/Turn signal lamp |
| F28 | â |
| F29 | â |
| F30 | Washer pump |
| F31 | Headlamp low-beam right |
| F32 | Headlamp low-beam left |
| F33 | Front fog lamps |
| F34 | Horn |
| F35 | â |
| F36 | Headlamp high-beam left |
| F37 | Headlamp high-beam right |
| F38 | Automatic headlamp leveling motor |
| F39 | Transmission control module 1 |
| F40 | Left rear bus electrical center/Ignition |
| F41 | Instrument cluster |
| F42 | Heating, ventilation, and air conditioning |
| F43 | Head-up display |
| F44 | â |
| F45 | â |
| F46 | â |
| F47 | â |
| F48 | Rear wiper 2 |
| F49 | Interior rearview mirror/Trailer |
| F50 | Fuel system control module |
| F51 | Heated steering wheel |
| F52 | Air conditioning clutch |
| F53 | Transmission range control module |
| F54 | Coolant pump |
| F55 | â |
| F56 | â |
| F57 | Engine control module/Ignition |
| F58 | Transmission control module/Ignition |
| F59 | Engine control module battery |
| F60 | Transmission control module 2 |
| F61 | O2 sensor 1/Aeroshutter |
| F62 | Engine control module â odd |
| F63 | O2 sensor 2 |
| F64 | Engine control module â even |
| F65 | Engine control module powertrain 1 |
| F66 | Engine control module powertrain 2 |
| F67 | Powertrain TRCM |
| F68 | â |
| F69 | â |
| F70 | â |
| F71 | â |
| F72 | â |
| F73 | â |
| F74 | â |
| F75 | â |
| F76 | â |
| F77 | â |
| Relays | Usage |
| K1 | Starter 1 |
| K2 | Run/Crank |
| K3 | Starter 3 |
| K4 | LED/Automatic headlamps |
| K5 | â |
| K6 | Coolant pump |
| K7 | Engine control module |
| K8 | Air conditioning |
| K9 | â |
| K10 | Starter 2 |
Instrument Panel Fuse Block
The instrument panel fuse block is inside the center console on the passenger side of the vehicle.
| Fuses | Usage |
| F1 | Body control module 6 |
| F2 | Diagnostic link |
| F3 | Electric steering column lock |
| F4 | â |
| F5 | Logistics |
| F6 | Heating, ventilation, and air conditioning |
| F7 | Body control module 3 |
| F8 | Head-up display (if equipped) |
| F9 | Right front heated seat |
| F10 | Airbag/Seat belt |
| F11 | Electronic precision shif |
| F12 | Amplifier |
| F13 | Body control module 7 |
| F14 | Left front heated seat |
| F15 | Instrument panel switch bank |
| F16 | Sunroof |
| F17 | Body control module 1 |
| F18 | Instrument cluster |
| F19 | â |
| F20 | Rear seat entertainment |
| F21 | Body control module 4 |
| F22 | Infotainment USBÂ data/Aux jack |
| F23 | Body control module 2 |
| F24 | USB charge/Wireless charging module |
| F25 | Parking assist |
| F26 | CIM |
| F27 | Video |
| F28 | Heating, ventilation, and air conditioning display |
| F29 | Radio |
| F30 | Steering wheel adjustment controls |
| F31 | Front blower |
| F32 | DC AC inverter |
| F33 | Driver power seat |
| F34 | Passenger power seat |
| F35 | Battery IEC 1 feed |
| F36 | Electric power steering |
| F37 | Rear seat entertainment/USB charge/Wireless charging module |
| F38 | Body control module 8 |
| F39 | â |
Â
| Circuit Breaker | Usage |
| F40 | â |
| F41 | â |
| F42 | Auxiliary power outlet/Lighter |
Rear Compartment Fuse Block
The rear compartment fuse block is behind a trim panel on the driver side of the rear storage compartment.
| Fuses | Usage |
| F1 | â |
| F2 | Trailer battery 1 |
| F3 | Driver seat belt motor |
| F4 | Rear blower |
| F5 | Rear drive control |
| F6 | Passenger seat belt motor |
| F7 | Right window |
| F8 | Rear defogger |
| F9 | Left window |
| F10 | â |
| F11 | Trailer reverse |
| F12 | â |
| F13 | â |
| F14 | â |
| F15 | â |
| F16 | â |
| F17 | Camera |
| F18 | Trailer module |
| F19 | Ventilated seats |
| F20 | â |
| F21 | Trailer connector |
| F22 | â |
| F23 | â |
| F24 | Passenger window switch |
| F25 | â |
| F26 | Trailer brake |
| F27 | Driver seat ventilation/Lumbar |
| F28 | Passive entry/Passive start |
| F29 | â |
| F30 | Canister vent |
| F31 | â |
| F32 | Heated mirrors |
| F33 | â |
| F34 | Liftgate module |
| F35 | Fuel system control module |
| F36 | Passenger seat ventilation/Lumbar |
| F37 | â |
| F38 | Window module |
| F39 | Rear closure |
| F40 | Memory seat module |
| F41 | Automatic occupancy sensor |
| F42 | Trailer battery 2 |
| F43 | â |
| F44 | â |
| F45 | Liftgate motor |
| F46 | Rear heated seats |
| F47 | â |
| F48 | Glass break sensor |
| F49 | â |
| F50 | â |
| F51 | â |
| F52 | Active dampening system module |
| F53 | Rear parking aid module/Video/USB |
| F54 | External object calculating/Side blind zone alert |
| F55 | â |
| F56 | Universal garage door-opener/Rain sensor |
| F57 | Theft deterrent system |
Â
| Circuit Breaker | Usage |
| CB1 | â |
| CB2 | â |
| CB3 | Rear auxiliary power outlet |
Â
| Relay | Usage |
| K1 | â |
| K2 | â |
Â
WARNING:Â Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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