Where are the Fuse Boxes located in the 2018 Chevrolet Silverado?

2018 Chevrolet Silverado has 3 main boxes with fuses and relays. One is under the hood (Engine Compartment) and two are in the Passenger Compartment i.e. on the left(Driver’s side) and another on the right(Passenger’s Side) of the Instrument Panel or Dashboard.

2018 Chevrolet Silverado Under Dash Fuse Box and Relay Location 

The auxiliary fuse box (If equipped) is located next to the interior fuse box. To open the lid, pull the tab in the direction as shown in the illustration.

There are two fuse block on either side of the Dashboard and the access door is on the driver’s side edge of the instrument panel and Passenger’s side located in the same area. Pull off the covers on either side to access the fuse block.

2018 Chevrolet Silverado Under Hood Fuse Box and Relay location

The under hood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse relay block.

2018 Chevrolet Silverado under Dash Fuse Box Layout

2018 Chevrolet Silverado under Dash Fuse Box and Relay Details(Left)

Assignment of the fuses in the Passenger Compartment(Driver’s Side)

No.Usage
1Accessory power outlet 2
2Special equipment option/Retained accessory power
3Universal remote system/lnterior rearview mirror
6Body control module 3
7Body control module 5
8Driver window switch/ Mirror switch
9Not Used
10Accessory power outlet/Retained accessory power
11Accessory power outlet battery
12Accessory power outlet 1/Cigarette lighter
13Discrete logic ignition switch
14Switch backlighting
17Body control module 1
19
20
22Heating, ventilation, and air conditioning/ Auxiliary heating, ventilation, and air conditioning/lgnition
23Instrument cluster/ Ignition sensing diagnostic module/ Ignition
24Not Used
25Data link connector/ Driver seat module
26Passive entry/Passive start/Heating, ventilation, and air conditioning
27Not Used
28Not Used
29Park enable/ Electrically adjustable pedals
30Special equipment option
31Accessory/Run/Crank
32Heated steering wheel
33Not Used
34Instrument cluster
36Not Used
37Not Used
384WD transfer case electronic control
40Left doors
41Driver power seat
43Left heated, cooled or ventilated seats (if equipped)
44Right heated, cooled or ventilated seats (if equipped)
45
Relays
49Retained accessory power
50Run/Crank

2018 Chevrolet Silverado under Dash Fuse Box and Relay Details(Right)

Assignment of the fuses in the Passenger Compartment(Passenger’s Side)

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

2018 Chevrolet Silverado Under Hood Fuse Box Layout

2018 Chevrolet Silverado under Hood Fuse Box and Relay Details

Assignment of the fuses in the Engine Compartment

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

WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.

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