GMC Sierra 2020 Fuse Box Info
Passenger compartment fuse box location:
The left instrument panel fuse box is located on the driver side edge of the instrument panel.
The right instrument panel fuse box is located on the passenger side edge of the instrument panel.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box (Left):
| Fuse/Relay N° | Functions |
| 1 | Rear heated seats left/right |
| 3 | Euro trailer |
| 4 | - |
| 5 | Front Bolster |
| 6 | Heated and ventilated seats left/right |
| 8 | Rear seat entertainment/Theft deterrent |
| 9 | Passive entry/Passive start/Driver seat module |
| 10 | - |
| 11 | Sunshade |
| 12 | Passenger power seat |
| 13 | Export power take off/ Special equipment option 1 |
| 14 | - |
| 15 | - |
| 16 | AMP |
| 17 | MFEG |
| 18 | - |
| 20 | Endgate |
| 22 | Rear sliding window |
| 23 | - |
| 24 | - |
| 25 | - |
| 26 | - |
| 27 | - |
| CB1 | - |
| K1 | Rear sliding window open |
| K2 | Rear sliding window close |
| K3 | MFEG major 1 |
| K4 | MFEG minor 1 |
| K5 | MFEG minor 2 |
| K6 | MFEG major 2 |
| K7 | Anti-theft |
| K8 | - |
Passenger compartment fuse box (Right):
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Right doors |
| 2 | Left doors |
| 3 | Universal remote system |
| 4 | - |
| 5 | - |
| 6 | Front blower |
| 8 | Lumbar switch |
| 10 | Body control module 6/Body control module 7 |
| 11 | Seat/CLM |
| 12 | Body control module 3/Body control module 5 |
| 14 | Mirrors/Windows module |
| 17 | Steering wheel controls |
| 18 | VPM/OBS DET |
| 19 | DLIS |
| 20 | Cooled seats |
| 21 | NOT R/C |
| 22 | Heated steering wheel |
| 23 | MISC R/C |
| 24 | Instrument panel cluster ignition/ Overhead |
| 25 | Heating, ventilation, and air conditioning ignition/Heating, ventilation, and air conditioning auxiliary |
| 26 | USB ports/Special equipment option retained accessory power |
| 27 | Accessory power outlet/retained accessory power |
| 28 | Accessory power outlet/Battery |
| 30 | Sensing and diagnostic module/ Parking brake |
| 31 | Body control module 4 |
| 32 | Special equipment option/Data link connection |
| 33 | Body control module 8 |
| 34 | Cargo lamp |
| 40 | CGM |
| 41 | Infotainment 1 |
| 42 | TCP |
| 43 | - |
| 44 | AVM |
| 45 | Body control module 2 |
| 46 | Heating, ventilation, and air conditioning/ Battery 1 |
| 47 | Instrument panel cluster/Battery |
| 48 | Transmission control module |
| 49 | Body control module 1 |
| 50 | - |
| 51 | Battery 1 |
| 52 | Battery 2 |
| 53 | - |
| 54 | Sunroof |
| 55 | Driver power seat |
| 56 | DC DC TRANS 1 |
| 57 | DC DC TRANS 2 |
| 58 | Infotainment 2 |
| Circuit Breakers | |
| 1 | Accessory power outlet 2 |
| 2 | Accessory power outlet 1/Cigarette Lighter |
| 3 | Accessory power outlet 3 |
| 4 | Accessory power outlet 4 |
| Relays | |
| K1 | Run/Crank |
| K2 | Retained accessory power/Accessory 1 |
| K4 | Retained accessory power/Accessory 2 |
| K5 | - |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| 1 | High-beam left |
| 2 | High-beam right |
| 3 | Headlamp left |
| 4 | Headlamp right |
| 5 | Headlamp |
| 6 | TIM |
| 7 | - |
| 8 | Fog lamp |
| 9 | VKM |
| 10 | - |
| 11 | Police upfitter |
| 12 | - |
| 13 | Washer front |
| 14 | Washer rear |
| 15 | MSB driver |
| 16 | - |
| 17 | IECL 1 |
| 18 | DC/AC inverter |
| 19 | DC/AC inverter |
| 20 | IECR 2 (LD) / EBCM2 (HD) |
| 21 | MSB pass |
| 22 | IECL 2 |
| 23 | Rear window defogger |
| 24 | EBCM 1 |
| 25 | REC |
| 26 | - |
| 27 | Horn |
| 28 | - |
| 29 | - |
| 30 | - |
| 31 | - |
| 32 | Rear window defogger |
| 33 | Heated mirror |
| 34 | Parking lamp left |
| 35 | Parking lamp |
| 36 | Run/Crank |
| 37 | Euro trailer |
| 38 | TIM |
| 39 | - |
| 40 | Misc ignition |
| 41 | Trailer parking lamp |
| 42 | Park lamp right |
| 43 | Second fuel pump |
| 44 | - |
| 45 | Second fuel pump |
| 46 | Engine control module ignition |
| 47 | Transmission control module ignition |
| 48 | - |
| 49 | Transmission control module |
| 50 | A/C clutch |
| 51 | Transfer case control module |
| 52 | Front wiper |
| 53 | Center high-mounted stop lamp |
| 54 | Trailer reverse lamp |
| 55 | Trailer back-up lamp |
| 56 | SADS |
| 57 | TTPM |
| 58 | Starter motor (LD & HD DSL) |
| 59 | A/C clutch |
| 60 | Active fuel management 1 |
| 61 | VES |
| 62 | Integrated chassis control module/CVS |
| 63 | Trailer battery |
| 64 | Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas) |
| 65 | Auxiliary underhood electrical center |
| 66 | Cooling fan motor left |
| 67 | Active fuel management 2 |
| 68 | - |
| 69 | Starter Pinion (LD) / Starter Motor (HD Gas) |
| 70 | Starter Pinion (LD) / Starter Motor (HD Gas) |
| 71 | Cooling fan |
| 72 | Cooling fan right |
| 73 | Trailer stop/turn lamp left |
| 74 | TIM |
| 75 | DEFC |
| 76 | Electric RNG BDS |
| 77 | Powertrain |
| 78 | Engine control module |
| 79 | Auxiliary battery |
| 80 | Cabin cooling pump |
| 81 | Trailer stop/turn lamp right |
| 82 | TIM |
| 83 | FTZM |
| 84 | Trailer brake |
| 85 | ENG |
| 86 | Engine control module |
| 87 | Injector B even |
| 88 | O2 B sensor |
| 89 | O2 A sensor |
| 90 | Injector A odd |
| 91 | Engine control module throttle control |
| 92 | Cool fan clutch |
