This Sierra has 4 different fuse boxes:
Engine Compartment Fuse Block diagramInstrument Panel Fuse Block (Left) diagramInstrument Panel Fuse Block (Right) - Front diagramInstrument Panel Fuse Block (Right) - Back diagram| Type | No. | Description | |
|---|---|---|---|
Fuse MINI | 1 | High-beam left | |
Fuse MINI | 2 | High-beam right | |
Fuse MINI | 3 | Headlamp left | |
Fuse MINI | 4 | Headlamp right | |
Fuse MINI | 6 | TIM | |
Fuse MINI | 8 | Fog lamp | |
Fuse MINI | 9 | VKM | |
Fuse MINI | 11 | Police upfitter | |
Fuse MINI | 13 | Washer front | |
Fuse MINI | 14 | Washer rear | |
Fuse FMX/JCase | 15 | MSB driver | |
Fuse FMX/JCase | 17 | IECL 1 | |
Fuse FMX/JCase | 19 | DC/AC inverter | |
Fuse FMX/JCase | 20 | IECR 2 [LD] / EBCM2 [HD] | |
Fuse FMX/JCase | 21 | MSB pass | |
Fuse FMX/JCase | 22 | IECL 2 | |
Fuse FMX/JCase | 24 | EBCM 1 | |
Fuse FMX/JCase | 25 | REC | |
Fuse MINI | 27 | Horn | |
Fuse FMM/MCase | 32 | Rear window defogger | |
Fuse MINI | 33 | Heated mirror | |
Fuse MINI | 34 | Parking lamp left | |
Fuse MINI | 37 | Euro trailer | |
Fuse MINI | 38 | TIM | |
Fuse MINI | 40 | Misc ignition | |
Fuse MINI | 41 | Trailer parking lamp | |
Fuse MINI | 42 | Park lamp right | |
Fuse MINI | 45 | Second fuel pump | |
Fuse MINI | 46 | Engine control module ignition | |
Fuse MINI | 47 | Transmission control module ignition | |
Fuse MINI | 49 | Transmission control module | |
Fuse MINI | 50 | A/C clutch | |
Fuse FMM/MCase | 51 | Transfer case control module | |
Fuse MINI | 52 | Front wiper | |
Fuse MINI | 53 | Center high-mounted stop lamp | |
Fuse MINI | 54 | Trailer reverse lamp | |
Fuse MINI | 55 | Trailer back-up lamp | |
Fuse MINI | 56 | SADS | |
Fuse MINI | 57 | TTPM | |
Fuse FMM/MCase | 58 | Starter motor [LD HD DSL] | |
Fuse MINI | 60 | Active fuel management 1 | |
Fuse MINI | 61 | VES | |
Fuse MINI | 62 | Integrated chassis control module/CVS | |
Fuse FMX/JCase | 63 | Trailer battery | |
Fuse FMX/JCase | 65 | Auxiliary underhood electrical center | |
Fuse FMX/JCase | 66 | Cooling fan motor left | |
Fuse MINI | 67 | Active fuel management 2 | |
Fuse FMX/JCase | 69 | Starter Pinion [LD] / Starter Motor [HD Gas] | |
Fuse FMX/JCase | 71 | Cooling fan | |
Fuse FMX/JCase | 72 | Cooling fan right | |
Fuse MINI | 73 | Trailer stop/turn lamp left | |
Fuse MINI | 74 | TIM | |
Fuse MINI | 75 | DEFC | |
Fuse FMM/MCase | 76 | Electric RNG BDS | |
Fuse MINI | 78 | Engine control module | |
Fuse MINI | 79 | Auxiliary battery | |
Fuse MINI | 80 | Cabin cooling pump | |
Fuse MINI | 81 | Trailer stop/turn lamp right | |
Fuse MINI | 82 | TIM | |
Fuse MINI | 83 | FTZM | |
Fuse FMM/MCase | 84 | Trailer brake | |
Fuse MINI | 85 | ENG | |
Fuse MINI | 86 | Engine control module | |
Fuse MINI | 87 | Injector B even | |
Fuse MINI | 88 | O2 B sensor | |
Fuse MINI | 89 | O2 A sensor | |
Fuse MINI | 90 | Injector A odd | |
Fuse MINI | 91 | Engine control module throttle control | |
Fuse MINI | 92 | Cool fan clutch | |
Relay | 5 | Headlamp | |
Relay | 18 | DC/AC inverter | |
Relay | 23 | Rear window defogger | |
Relay | 35 | Parking lamp | |
Relay | 36 | Run/Crank | |
Relay | 43 | Second fuel pump | |
Relay | 59 | A/C clutch | |
Relay | 64 | Starter Motor [LD & HD DSL]/ Cool Fan Clutch [HD Gas] | |
Relay | 70 | Starter Pinion [LD] / Starter Motor [HD Gas] | |
Relay | 77 | Powertrain |
| Type | No. | Description | |
|---|---|---|---|
Fuse ATO | F1 | Rear heated seats left/right | |
Fuse FMM/MCase | F3 | Euro trailer | |
Fuse ATO | F5 | Front Bolster | |
Fuse ATO | F6 | Heated and ventilated seats left/right | |
Fuse ATO | F8 | Rear seat entertainment/Thef deterrent | |
Fuse ATO | F9 | Passive entry/Passive start/Driver seat module | |
Fuse FMM/MCase | F11 | Sunshade | |
Fuse FMM/MCase | F12 | Passenger power seat | |
Fuse ATO | F13 | Export power take off/ Special equipment option 1 | |
Fuse MICRO2 | F16 | AMP | |
Fuse FMM/MCase | F17 | MFEG | |
Fuse MICRO2 | F20 | Endgate | |
Fuse FMM/MCase | F22 | Rear sliding window | |
Relay | K1 | Rear sliding window open | |
Relay | K2 | Rear sliding window close | |
Relay | K3 | MFEG major 1 | |
Relay | K4 | MFEG minor 1 | |
Relay | K5 | MFEG minor 2 | |
Relay | K6 | MFEG major 2 | |
Relay | K7 | Anti-theft |
| Type | Description | |
|---|---|---|
Fuse FMM/MCase | F2 Left doors | |
Fuse MICRO2 | F3 Universal remote system | |
Fuse FMX/JCase | F6 Front blower | |
Fuse MICRO2 | F8 Lumbar switch | |
Fuse MICRO3 | F10 Body control module 6/Body module 7 | |
Fuse MICRO3 | F11 Seat/CLM | |
Fuse MICRO3 | F12 Body control module 3/Body module 5 | |
Fuse MICRO2 | F14 Mirrors/Windows module | |
Fuse MICRO2 | F17 Steering wheel controls | |
Fuse MICRO3 | F18 VPM/OBS DET | |
Fuse MICRO3 | F19 DLIS | |
Fuse MICRO2 | F20 Ventilated seats | |
Fuse MICRO2 | F21 NOT R/C | |
Fuse MICRO2 | F22 Heated steering wheel | |
Fuse MICRO2 | F23 MISC R/C | |
Fuse MICRO3 | F24 Instrument panel cluster ignition/ Overhead | |
Fuse MICRO3 | F25 Heating, ventilation, and air conditioning ignition/Heating, ventilation, and air conditioning auxiliary | |
Fuse MICRO3 | F26 USB ports/Special equipment option retained accessory power | |
Fuse FMX/JCase | F27 Accessory power outlet/retained accessory power | |
Fuse MICRO2 | F28 Accessory power outlet/Battery | |
Fuse MICRO3 | F30 Sensing and diagnostic module/ Parking brake | |
Fuse MICRO2 | F31 Body control module 4 | |
Fuse MICRO3 | F32 Special equipment option/Data link connection | |
Fuse MICRO2 | F33 Body control module 8 | |
Fuse MICRO2 | F34 Cargo lamp | |
Fuse MICRO2 | F40 CGM | |
Fuse MICRO2 | F41 Infotainment 1 | |
Fuse MICRO2 | F42 TCP | |
Fuse MICRO2 | F44 AVM | |
Fuse MICRO2 | F45 Body control module 2 | |
Fuse MICRO2 | F46 Heating, ventilation, and air conditioning/ Battery 1 | |
Fuse MICRO2 | F47 Instrument panel cluster/Battery | |
Fuse MICRO2 | F48 Transmission control module | |
Fuse MICRO2 | F49 Body control module 1 | |
Fuse FMX/JCase | F51 Battery 1 | |
Fuse FMX/JCase | F52 Battery 2 | |
Fuse FMX/JCase | F54 Sunroof | |
Fuse FMM/MCase | F55 Driver power seat | |
Fuse MICRO3 | F58 Infotainment 2 | |
Other | Connector 1 Connector | |
Connector | Connector 2 Connector |
| Type | No. | Description | |
|---|---|---|---|
Circuit breaker ATO | CB1 | Accessory power outlet 2 | |
Circuit breaker ATO | CB2 | Accessory power outlet 1/Cigarette Lighter | |
Circuit breaker ATO | CB3 | Accessory power outlet 3 | |
Circuit breaker ATO | CB4 | Accessory power outlet 4 | |
Relay | K1 | Run/Crank | |
Relay | K2 | Retained accessory power/Accessory 1 | |
Relay | K4 | Retained accessory power/Accessory 2 | |
Fuse FMM/MCase | F1 | Right doors | |
Fuse FMX/JCase | F56 | DC DC TRANS 1 | |
Fuse FMX/JCase | F57 | DC DC TRANS 2 |
GMC Sierra fuse box diagrams change across years, pick the right year of your vehicle:
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Source: GMC Sierra 2020 Owner's Manual
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