2020 GMC Sierra fuse box diagram

The 2020 GMC 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

2020 GMC Sierra fuse box diagram - StartMyCar (2024)