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.
- Push the tab at the top of fuse block down.
- Pull the top of the fuse block outward.
- 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 Diagram(Left)
2021 Chevrolet Silverado under Dash Fuse Box and Relay Details(Left)
Assignment of the fuses in the Passenger Compartment(Driver’s Side)
| No. | Usage |
| F1 | Rear heated seats left/right |
| F3 | — |
| F4 | — |
| F5 | Spare/MFEG (Multifunction End Gate) |
| F6 | Heated and cooled seats left/right |
| F8 | — |
| F9 | Passive entry/Passive start/Driver seat module |
| F10 | — |
| F11 | — |
| F12 | Passenger power seat |
| F13 | Export power take off/ Special equipment option 1 |
| F14 | — |
| F15 | — |
| F16 | Amplifier |
| F17 | MFEG (Multifunction End Gate) |
| F18 | — |
| F20 | Endgate |
| F22 | Rear sliding window |
| F23 | — |
| F24 | — |
| F25 | — |
| F26 | — |
| F27 | — |
| Circuit Breakers | |
| CB1 | — |
| 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 | — |
| K8 | — |
2021 Chevrolet Silverado Under Dash Fuse Box Diagram(Right)
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 |
| F1 | Right doors |
| F2 | Left doors |
| F3 | Universal remote system |
| F4 | — |
| F5 | — |
| F6 | Front blower |
| F8 | Lumbar switch |
| F10 | Body control module 6/ Body control module 7 |
| F11 | Seat/ Column lock module |
| F12 | Body control module 3/Body control module 5 |
| F14 | Mirrors/Windows module |
| F17 | Steering wheel controls |
| F18 | Video processing module/ Obstacle detection |
| F19 | Discrete Logic Ignition Switch (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 | Central Gateway Module (CGM) |
| F41 | Infotainment 1 |
| F42 | Telematics Connectivity Platform (TCP) |
| F43 | — |
| F44 | Active vibration management (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 | — |
| F51 | Battery 1 |
| F52 | Battery 2 |
| F53 | — |
| 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 | — |
2021 Chevrolet Silverado Under Hood Fuse Box Layout
2021 Chevrolet Silverado Under Hood Fuse Box Diagram
2021 Chevrolet Silverado under Hood Fuse Box and Relay Details
Assignment of the fuses in the Engine Compartment
| No. | Usage |
| 1 | High-beam left |
| 2 | High-beam right |
| 3 | Headlamp left |
| 4 | Headlamp right |
| 6 | TIM |
| 7 | — |
| 8 | Fog lamp |
| 9 | — |
| 10 | — |
| 11 | Police upfitter |
| 12 | — |
| 13 | Washer front |
| 14 | Washer rear |
| 15 | MSB driver |
| 16 | — |
| 17 | IECL 1 |
| 19 | DC/AC inverter |
| 20 | IECR 2 (LD) / EBCM2 (HD) |
| 21 | MSB pass |
| 22 | IECL 2 |
| 24 | Eboost 1 / EBCM 1 |
| 25 | REC |
| 26 | — |
| 27 | Horn |
| 28 | — |
| 29 | — |
| 30 | — |
| 31 | — |
| 32 | Rear window defogger |
| 33 | Heated mirror |
| 34 | Parking lamp left |
| 37 | Euro trailer |
| 38 | TIM |
| 39 | — |
| 40 | Misc ignition |
| 41 | Trailer parking lamp |
| 42 | Park lamp right |
| 44 | — |
| 45 | Second fuel pump |
| 46 | Engine control module ignition |
| 47 | Transmission control module ignition |
| 48 | — |
| 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/SBZA |
| 58 | 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 | — |
| 69 | 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 | Starter Motor (LD & HD DSL) / Cool Fan Clutch (HD Gas) |
| 70 | Starter Pinion (LD) / Starter Motor (HD Gas) |
| 77 | Powertrain |
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.
