Where are the Fuse Boxes located in the 2021 Chevrolet Silverado?

2021 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.

2021 Chevrolet Silverado Under Dash Fuse Box and Relay Location 

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.

  1. Push the tab at the top of fuse block down.
  2. Pull the top of the fuse block outward.
  3. Reverse Steps 1–2 to reinstall.

2021 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.

2021 Chevrolet Silverado under Dash Fuse Box Layout

2021 Chevrolet Silverado under Dash Fuse Box and Relay Details(Left)

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

No.Usage
F1Rear heated seats left/right
F3
F4
F5Spare/MFEG (Multifunction End Gate)
F6Heated and cooled seats left/right
F8
F9Passive entry/Passive start/Driver seat module
F10
F11
F12Passenger power seat
F13Export power take off/ Special equipment option 1
F14
F15
F16Amplifier
F17MFEG (Multifunction End Gate)
F18
F20Endgate
F22Rear sliding window
F23
F24
F25
F26
F27
Circuit Breakers
CB1
Relays
K1Rear sliding window open
K2Rear sliding window close
K3MFEG major 1
K4MFEG minor 1
K5MFEG minor 2
K6MFEG major 2
K7
K8

Back

2021 Chevrolet Silverado under Dash Fuse Box and Relay Details(Right)

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

No.Usage
F1Right doors
F2Left doors
F3Universal remote system
F4
F5
F6Front blower
F8Lumbar switch
F10Body control module 6/ Body control module 7
F11Seat/ Column lock module
F12Body control module 3/Body control module 5
F14Mirrors/Windows module
F17Steering wheel controls
F18Video processing module/ Obstacle detection
F19Discrete Logic Ignition Switch (DLIS)
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
F40Central Gateway Module (CGM)
F41Infotainment 1
F42Telematics Connectivity Platform (TCP)
F43
F44Active vibration management (AVM)
F45Body control module 2
F46Heating, ventilation, and air conditioning/ Battery 1
F47Instrument panel cluster/Battery
F48Transmission control module
F49Body control module 1
F50
F51Battery 1
F52Battery 2
F53
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
CB3 Accessory power outlet 3
CB4Accessory power outlet 4
Relays
K1Run/Crank
K2Retained accessory power/ Accessory 1
K4 Retained accessory power/ Accessory 2
K5

2021 Chevrolet Silverado Under Hood Fuse Box Layout

2021 Chevrolet Silverado under Hood Fuse Box and Relay Details

Assignment of the fuses in the Engine Compartment

No.Usage
1High-beam left
2High-beam right
3Headlamp left
4Headlamp right
6TIM
7
8Fog lamp
9
10
11Police upfitter
12
13Washer front
14Washer rear
15MSB driver
16
17IECL 1
19DC/AC inverter
20 IECR 2 (LD) / EBCM2 (HD)
21MSB pass
22IECL 2
24Eboost 1 / EBCM 1
25REC
26
27Horn
28
29
30
31
32Rear window defogger
33Heated mirror
34Parking lamp left
37Euro trailer
38TIM
39
40Misc ignition
41Trailer parking lamp
42Park lamp right
44
45Second fuel pump
46Engine control module ignition
47Transmission control module ignition
48
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/SBZA
58 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
68
69 Starter Pinion (LD) / Starter Motor (HD Gas)
71Cooling fan
72Cooling fan right
73Trailer stop/turn lamp left
74 TIM
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
64Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas)
70Starter Pinion (LD) / Starter Motor (HD Gas)
77Powertrain

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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