GMC Sierra (mk4; 2014-2018) fuses and relays

 

Fuse box diagram: GMC Sierra (mk4; 2014-2018)

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GMC Sierra 2014, 2015, 2016, 2017
GMC Sierra 2018

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Fuse box location

Passenger compartment fuse boxes

Instrument Panel Fuse Block (Left)
The left instrument panel fuse block access door is on the driver side edge of the instrument panel

Instrument Panel Fuse Block (Right)
The right instrument panel fuse block access door is on the passenger side edge of the instrument panel

Engine compartment

The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle

Fuse box diagrams 2014, 2015, 2016, 2017

Engine compartment

 

Assignment of the fuses in the engine compartment (2014-2017)

№	Usage
Micro J-Case Fuses
1	Trailer Brake
2	Trailer Battery
J-Case Fuses
3	Antilock Brake System Pump
4	Instrument Panel BEC 1
5	Spare
6	4WD Tree
7	Spare
8	Instrument Panel BEC 2
9	Spare
10	Rear Window Defogger
11	Starter
12	Cooling Fan 1
13	Cooling Fan 2
Mini Fuses (2 Pin)
14	Trailer Stop/Turn Lamps, Left
15	Trailer Parking Lamps
16	Trailer Back-up Lamp
17	Trailer Stopfium Lamps, Right
Micro Fuses (2 Pin)
18	Fuel Pump
19	Integrated Chassis Control Module
20	Electronic Suspension Control Module
21	Fuel Pump Power Module
22	Upfitter Switch 1
23	Upfffler2
24	Front Wiper
25	Antilock Brake System Valves
26	Upfitter SW 2
27	Upfitter SW 3
28	Parlang Lamps, Right
29	Parlang Lamps, Left
30	Upfitter 3
31	Upfitter SW 4
32	Upfitter 4
33	Back-up Lamps
34	Engine Control Module Ignition
35	Air Conditioning Compressor Clutch
36	Heated Mirrors
37	Upfflter 1
38	Center High-Mounted Stoplamp
39	Miscellaneous Ignition
40	Transmission Ignition
41	Fuel Pump 2
42	Cooling Fan Clutch
43	Engine
44	Fuel Injectors A, Odd
45	Fuel Injectors B, Even
46	Oxygen Sensor B
47	Throttle Control
48	Horn
49	Fog Lamp
50	Oxygen Sensor A
51	Engine Control Module
52	Interior Heater
53	Spare
54	Aeroshutter
55	Front Washer
Micro Fuses (3 Pin)
56	Air Conditioning Compressor/Battery Regulated Voltage Control
57	Air Conditioning CompressorModule/Battery Pack
58	Transmission Control Module/Engine Control Module
59	Headlamps
Micro Relays
60	Fuel Pump
61	Upfitter2
62	Upfitter3
63	Upfitter4
64	Trailer Parking Lamps
65	Run/Crank
66	Upfitter 1
67	Fuel Pump 2
68	Air Conditioning Control
69	Starter
70	Rear Window Defogger
71	Engine Control Module
Solid State Relay
72	Cooling Fan Clutch

Instrument Panel (Left)

Assignment of the fuses in the Instrument Panel Fuse Block (Left) (2014-2017)

№	Usage
1	Accessory Power Outlet 2
2	SEO Retained Accessory Power
3	Universal Garage Door Opener/lnside Rearview Mirror
6	Body Control Module 3
7	Body Control Module 5
8	Driver Window Switch/Mirror Switch
9	Spare
10	Accessory Power Outlet Retained Accessory Power
11	Accessory Power Outlet Battery
12	Accessory Power Outlet 1/Cigarette Lighter
13	Discrete Logic Ignition Switch
14	Switch Backlighting
17	Body Control Module 1
19	Spare
20	Spare
22	Heater, Ventilation, and Air Conditioning/Auxiliary Heater, Ventilation and Air Conditioning Ignition
23	Instrument Cluster Ignition/Sensing Diagnostic Module Ignition
24	Spare
25	Data Link Connector/Driver Seat Module
26	Passive Entry Passive Start/Heater, Ventilation, and Air Conditioning
27	Spare
28	Spare
29	Park Enable/Electrically Adjustable Pedals
30	SEO
31	Accessory/Run Crank
32	Heated Steering Wheel
33	Spare
34	Instrument Cluster
36	Spare
37	Spare
40	Left Doors
41	Driver Power Seat
43	Left Front Heated/Cooled Seat
44	Right Front Heated/Cooled Seats
45	Spare
49	Retained Accessory Power/Accessory
50	Run/Crank

Instrument Panel (Right)

Assignment of the fuses in the Instrument Panel Fuse Block (Right) (2014-2017)

№	Usage
1	Accessory Power Outlet 3
2	Accessory Power Outlet 4
7	Body Control Module 4
8	Body Control Module 8
9	Rear Seat Entertainment
10	Cargo Lamp
15	Steering Wheel Controls
18	Radio
19	Spare
20	Sunroof
23	Airbag/lnfo
26	Export/Power Take Off/SEO Battery 1
27	Obstacle Detection/USB Ports
28	Body Control Module 2
32	SEO Battery 2
35	AC Inverter
36	Amplifier
37	Spare
39	Rear Sliding Window
42	Right Door Window Motor
43	Front Blower
44	SEO
45	Body Control Module 6
46	Body Control Module 7
47	Passenger Seat
50	Retained Accessory Power/Accessory
51	Rear Sliding Window Open
52	Rear Sliding Window Close

Fuse box diagrams 2018

Engine compartment

 

Assignment of the fuses in the engine compartment (2018)

№	Usage
1	Trailer brake
2	Trailer battery
3	Antilock brake system pump
4	Instrument panel BEC 1
5	Passenger motorized seat belt
6	4WD transfer case electronic control
7	Electric park brake
8	Instrument panel BEC 2
9	Driver motorized seat belt
10	Rear window defogger
11	Starter
12	Cooling fan 1
13	Cooling fan 2
14	Left trailer stop/ Turn signal lamps
15	Trailer parking lamps
16	Trailer reverse lamps
17	Right trailer stop/ Turn signal lamps
18	Fuel pump
19	Integrated chassis control module
20	Electronic suspension control module
21	Fuel pump power module
22	Upfitter 1
23	Upfitter2
24	Front wiper
25	Antilock brake system valve
26	Upfitter 2
27	Upfitter 3
28	Right parking lamps
29	Left parking lamps
30	Upfitter 3
31	Upfitter 4
32	Upfitter 4
33	Reverse lamps
34	Engine control module/Ignition
35	Air conditioning clutch
36	Heated mirrors
37	Upfitter 1
38	Center high-mounted stoplamp
39	Miscellaneous/ Ignition
40	Transmission/ Ignition
41	Fuel pump 2
42	Cooling fan clutch
43	Engine
44	Fuel injectors A–odd
45	Fuel injectors B–even
46	O2 Sensor B
47	Throttle control
48	Horn
49	Fog lamps
50	O2 Sensor A
51	Engine control module
52	Interior heater
53	Accessory power module/TPM pump
54	Front washer
55	Air conditioning/ Battery regulated voltage control
56	Air conditioning module/ Battery pack
57	Transmission control module/ Engine control module
58	Headlamps
74	Electric running boards (if equipped)
76	Fuel pump prime / MGU motor
77	Cabin pump motor
79	Vacuum pump
Relays
59	Fuel pump
60	Upfitter 2
61	Upfitter 3
62	Upfitter 4
63	Trailer parking lamps
64	Run/Crank
65	Upfitter 1
66	Fuel pump 2
67	Air conditioning control
68	Starter
69	Rear window defogger
70	Engine control module
71	Vacuum pump/ Cooling fan clutch
72	CKT 95
73	CKT 92
75	Fuel pump prime/ MGU motor
78	Vacuum pump switch

Instrument Panel (Left)

Assignment of the fuses in the Instrument Panel (Left) (2018)

№	Usage
1	Accessory power outlet 2
2	Special equipment option/Retained accessory power
3	Universal remote system/lnterior rearview mirror
6	Body control module 3
7	Body control module 5
8	Driver window switch/ Mirror switch
9	Not Used
10	Accessory power outlet/Retained accessory power
11	Accessory power outlet battery
12	Accessory power outlet 1/Cigarette lighter
13	Discrete logic ignition switch
14	Switch backlighting
17	Body control module 1
19	Not Used
20	Not Used
22	Heating, ventilation, and air conditioning/ Auxiliary heating, ventilation, and air conditioning/lgnition
23	Instrument cluster/ Ignition sensing diagnostic module/ Ignition
24	Not Used
25	Data link connector/ Driver seat module
26	Passive entry/Passive start/Heating, ventilation, and air conditioning
27	Not Used
28	Not Used
29	Park enable/ Electrically adjustable pedals
30	Special equipment option
31	Accessory/Run/Crank
32	Heated steering wheel
33	Not Used
34	Instrument cluster
36	Not Used
37	Not Used
38	4WD transfer case electronic control
40	Left doors
41	Driver power seat
43	Left heated, cooled or ventilated seats (if equipped)
44	Right heated, cooled or ventilated seats (if equipped)
45	Not Used
Relays
49	Retained accessory power
50	Run/Crank

Instrument Panel (Right)

 

Assignment of the fuses in the Instrument Panel (Right) (2018)

№	Usage
1	Accessory power outlet 3
2	Accessory power outlet 4
7	Body control module 4
8	Body control module 8
9	Rear seat entertainment
10	Cargo lamp
15	Steering wheel controls
18	Radio
19	Not Used
20	Sunroof
23	Airbag/lnfo
26	Export/Power take off/ Special equipment option/Battery 1
27	Obstacle detection/ USB ports
28	Body control module 2
32	Special equipment option/Battery 2
35	Air conditioning inverter
36	Amplifier
37	Battery system
39	Rear sliding window
42	Right door window motor
43	Front blower
44	Special equipment option
45	Body control module 6
46	Body control module 7
47	Passenger seat
Relays
50	Retained accessory power
51	Rear sliding window open
52	Rear sliding window close