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

 

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 Layout GMC Sierra 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..)

 

Assignment of the fuses in the engine compartment (2019, 2020)

Usage
1 High-beam left
2 High-beam right
3 Headlamp left
4 Headlamp right
6 TIM
7 Not Used
8 Fog lamp
9 VKM
10 Not Used
11 Police upfitter
12 Not Used
13 Washer front
14 Washer rear
15 MSB driver
16 Not Used
17 IECL 1
19 DC/AC inverter
20 2019: IECR 2
2020: IECR 2 (LD) / EBCM2 (HD)
21 MSB pass
22 IECL 2
24 2019: Eboost 1
2020: EBCM 1
25 REC
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
47 Transmission control module ignition
48 Not Used
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 2019: Starter motor
2020: Starter motor (LD & HD DSL)
60 Active fuel management 1
61 VES
62 Integrated chassis control module/CVS
63 Trailer battery
65 Auxiliary underhood electrical center
66 Cooling fan motor left
67 Active fuel management 2
68 Not Used
69 2019: Starter pinion
2020: 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
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
Relays
5 Headlamp
18 DC/AC inverter
23 Rear window defogger
35 Parking lamp
36 Run/Crank
43 Second fuel pump
59 A/C clutch
64 2019: Starter motor.
2020: Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas)
70 2019: Starter pinion.
2020: Starter Pinion (LD) / Starter Motor (HD Gas)
77 Powertrain

Instrument Panel Fuse Block (Left)

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

 

Assignment of the fuses in the Left Instrument Panel Fuse Block (2019, 2020)

Usage
F1 Rear heated seats left/right
F3 Euro trailer
F4 Not Used
F5 Front Bolster
F6 Heated and cooled seats left/right
F8 Rear seat entertainment/Theft deterrent
F9 Passive entry/Passive start/Driver seat module
F10 Not Used
F11 Sunshade
F12 Passenger power seat
F13 Export power take off/ Special equipment option 1
F14 Not Used
F15 Not Used
F16 AMP
F17 MFEG
F18 Not Used
F20 Endgate
F22 Rear sliding window
F23 Not Used
F24 Not Used
F25 Not Used
F26 Not Used
F27 Not Used
Circuit Breakers
CB1 Not Used
Relays
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 Not Used

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
F1 Right doors
F2 Left doors
F3 Universal remote system
F4 Not Used
F5 Not Used
F6 Front blower
F8 Lumbar switch
F9 Not Used
F10 Body control module 6/Body control module 7
F11 Seat/CLM
F12 Body control module 3/Body control module 5
F14 Mirrors/Windows module
F17 Steering wheel controls
F18 VPM/OBS DET
F19 DLIS
F20 Cooled seats
F21 NOT R/C
F22 Heated steering wheel
F23 MISC R/C
F24 Instrument panel cluster ignition/ Overhead
F25 Heating, ventilation, and air conditioning ignition/Heating, ventilation, and air conditioning auxiliary
F26 USB ports/Special equipment option retained accessory power
F27 Accessory power outlet/retained accessory power
F28 Accessory power outlet/Battery
F30 Sensing and diagnostic module/ Parking brake
F31 Body control module 4
F32 Special equipment option/Data link connection
F33 Body control module 8
F34 Cargo lamp
F40 CGM
F41 Infotainment 1
F42 TCP
F43 Not Used
F44 AVM
F45 Body control module 2
F46 Heating, ventilation, and air conditioning/ Battery 1
F47 Instrument panel cluster/Battery
F48 Transmission control module
F49 Body control module 1
F50 Not Used
F51 Battery 1
F52 Battery 2
F53 Not Used
F54 Sunroof
F55 Driver power seat
F56 DC DC TRANS 1
F57 DC DC TRANS 2
F58 Infotainment 2
Circuit Breakers
CB1 Accessory power outlet 2
CB2 Accessory power outlet 1/Cigarette Lighter
CB3 Accessory power outlet 3
CB4 Accessory power outlet 4
Relays
K1 Run/Crank
K2 Retained accessory power/Accessory 1
K4 Retained accessory power/Accessory 2
K5 Not Used


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