GMC Sierra (mk5; 2019-2020..) fuses and relays

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In this article, you will find fuse box diagrams of GMC Sierra 2019 and 2020, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse box diagram: GMC Sierra (mk5; 2019-2020..)


Cigar lighter / power outlet fuses in the GMC Sierra are the fuses F27, F28, and circuit breakers CB1, CB2, CB3 and CB4 in the Right Instrument panel fuse box.


Fuse box location

Instrument Panel Fuse Block (Left)

The left instrument panel fuse block access door is on the driver side edge of the instrument panel.The location of the fuses in the passenger compartment (left): GMC Sierra (2019..)

Instrument Panel Fuse Block (Right)

The right instrument panel fuse block access door is on the passenger side edge of the instrument panel.The location of the fuses in the passenger compartment (right): GMC Sierra (2019..)

To access the back of the block:
1) Push the tab at the top of fuse block down;
2. Pull the top of the block outward;
3. Reverse Steps 1-2 to reinstall.

Engine compartment

The location of the fuses in the engine compartment: GMC Sierra (2019..)

Fuse box diagrams 2019, 2020

Engine compartment

Under-hood fuse box diagram: GMC Sierra (2019, 2020..)

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Assignment of the fuses in the engine compartment (2019, 2020)
Usage
1High-beam left
2High-beam right
3Headlamp left
4Headlamp right
6TIM
7Not Used
8Fog lamp
9VKM
10Not Used
11Police upfitter
12Not Used
13Washer front
14Washer rear
15MSB driver
16Not Used
17IECL 1
19DC/AC inverter
202019: IECR 2
2020: IECR 2 (LD) / EBCM2 (HD)
21MSB pass
22IECL 2
242019: Eboost 1
2020: EBCM 1
25REC
26 Not Used
27 Horn
28 Not Used
29 Not Used
30 Not Used
31 Not Used
32 Rear window defogger
33 Heated mirror
34 Parking lamp left
37 Euro trailer
38 TIM
39 Not Used
40 Misc ignition
41 Trailer parking lamp
42 Park lamp right
44 Not Used
45 Second fuel pump
46 Engine control module ignition
47Transmission control module ignition
48Not Used
49Transmission control module
50A/C clutch
51Transfer case control module
52Front wiper
53Center high-mounted stop lamp
54Trailer reverse lamp
55Trailer back-up lamp
56SADS
57TTPM
582019: Starter motor
2020: Starter motor (LD & HD DSL)
60Active fuel management 1
61VES
62Integrated chassis control module/CVS
63Trailer battery
65Auxiliary underhood electrical center
66Cooling fan motor left
67Active fuel management 2
68Not Used
692019: Starter pinion
2020: Starter Pinion (LD) / Starter Motor (HD Gas)
71Cooling fan
72Cooling fan right
73Trailer stop/turn lamp left
74TIM
75DEFC
76Electric RNG BDS
78Engine control module
79Auxiliary battery
80Cabin cooling pump
81Trailer stop/turn lamp right
82TIM
83FTZM
84Trailer brake
85ENG
86Engine control module
87Injector B even
88O2 B sensor
89O2 A sensor
90Injector A odd
91Engine control module throttle control
92Cool fan clutch
Relays
5Headlamp
18DC/AC inverter
23Rear window defogger
35Parking lamp
36Run/Crank
43Second fuel pump
59A/C clutch
642019: Starter motor.
2020: Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas)
702019: Starter pinion.
2020: Starter Pinion (LD) / Starter Motor (HD Gas)
77Powertrain

Instrument Panel Fuse Block (Left)

Instrument panel fuse box diagram (left): GMC Sierra (2019, 2020..)

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Assignment of the fuses in the Left Instrument Panel Fuse Block (2019, 2020)
Usage
F1Rear heated seats left/right
F3Euro trailer
F4Not Used
F5Front Bolster
F6Heated and cooled seats left/right
F8Rear seat entertainment/Theft deterrent
F9Passive entry/Passive start/Driver seat module
F10Not Used
F11Sunshade
F12Passenger power seat
F13Export power take off/ Special equipment option 1
F14Not Used
F15Not Used
F16AMP
F17MFEG
F18 Not Used
F20 Endgate
F22 Rear sliding window
F23Not Used
F24 Not Used
F25Not Used
F26 Not Used
F27Not Used
Circuit Breakers
CB1Not Used
Relays
K1Rear sliding window open
K2Rear sliding window close
K3MFEG major 1
K4MFEG minor 1
K5MFEG minor 2
K6MFEG major 2
K7Anti-theft
K8Not Used

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Instrument Panel Fuse Block (Right)

Instrument panel fuse box diagram (right): GMC Sierra (2019, 2020..)

Assignment of the fuses in the Right Instrument Panel Fuse Block (2019, 2020)
Usage
F1Right doors
F2Left doors
F3Universal remote system
F4Not Used
F5Not Used
F6Front blower
F8Lumbar switch
F9Not Used
F10Body control module 6/Body control module 7
F11Seat/CLM
F12Body control module 3/Body control module 5
F14Mirrors/Windows module
F17Steering wheel controls
F18VPM/OBS DET
F19DLIS
F20Cooled seats
F21NOT R/C
F22Heated steering wheel
F23MISC R/C
F24Instrument panel cluster ignition/ Overhead
F25Heating, ventilation, and air conditioning ignition/Heating, ventilation, and air conditioning auxiliary
F26USB ports/Special equipment option retained accessory power
F27Accessory power outlet/retained accessory power
F28Accessory power outlet/Battery
F30Sensing and diagnostic module/ Parking brake
F31Body control module 4
F32Special equipment option/Data link connection
F33Body control module 8
F34Cargo lamp
F40CGM
F41Infotainment 1
F42TCP
F43Not Used
F44AVM
F45Body control module 2
F46Heating, ventilation, and air conditioning/ Battery 1
F47Instrument panel cluster/Battery
F48Transmission control module
F49Body control module 1
F50Not Used
F51Battery 1
F52Battery 2
F53Not Used
F54Sunroof
F55Driver power seat
F56DC DC TRANS 1
F57DC DC TRANS 2
F58Infotainment 2
Circuit Breakers
CB1Accessory power outlet 2
CB2Accessory power outlet 1/Cigarette Lighter
CB3Accessory power outlet 3
CB4Accessory power outlet 4
Relays
K1Run/Crank
K2Retained accessory power/Accessory 1
K4Retained accessory power/Accessory 2
K5Not Used