Chevrolet Silverado 4 generations were produced in 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 in various modifications 1500 2500 3500 medium duty version 4500HD, 5500HD, 6500HD and Silverado EV. During this time, the model received an update. In our post you will find a designation of Chevrolet Silverado 4G fuses and relays with box diagrams, locations and photo. We’ll show you which fuses are responsible for the cigarette lighter and USB.
The purpose of fuses and relays may differ from those presented and depend on the type of engine and year of manufacture of your car.
Passenger compartment
Left fuse box
Fuse and relay box is located on the driver side of the instrument panel. To access you need to remove the protective cover.
Location
Check the information with your diagrams on the back of the block cover.
Diagram
Assignment
| F1 | Rear heated seats left/ right |
| F3 | 2019-2020: Euro trailer |
| F4 | — |
| F5 | 2019-2020: Front Bolster 2021-2022: Spare/MFEG (Multifunction End Gate) |
| F6 | Heated and cooled seats left /right |
| F8 | 2019-2020: Rear seat entertainment/ Theft deterrent |
| F9 | Passive entry/ Passive start /Driver seat module |
| F10 | — |
| F11 | 2019-2020: Sunshade |
| 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 | 2019-2020: Anti-theft |
| K8 | — |
Right fuse box
The second box with fuses and relays is located at the end of the dashboard on the passenger side.
Pull off the cover to access the front of the fuse block. To access the back of the fuse box:
Diagram
Back side
Designation
| 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 | 2019-2021: Instrument panel cluster ignition/ Overhead 2022: Power Take Off/ Reflective Light Auxiliary Display/ Instrument Panel Cluster/ Central Gateway Module/ Inside Rear View Mirror/ Overhead Console Module Ignition |
| 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 | 2019-2021: 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 | 2019-2021: Accessory power outlet 3 |
| CB4 | 2019-2021: Accessory power outlet 4 |
| Relays | |
| K1 | Run/ Crank |
| K2 | Retained accessory power/ Accessory 1 |
| K4 | 2019-2021: Retained accessory power/ Accessory 2 |
| K5 | — |
Cigar lighter (power outlet) fuses in the Chevrolet Silverado 4G are the fuses № 27, 28 and circuit breakers CB1, CB2, CB3, CB4.
Engine compartment
Under the hood, the fuse and relay box is located on the right side of the engine compartment and is covered with a protective cover.
Diagram
Allocation
| 1 | High-beam left |
| 2 | High-beam right |
| 3 | Headlamp left |
| 4 | Headlamp right |
| 6 | TIM |
| 7 | — |
| 8 | Fog lamp |
| 9 | VKM |
| 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 | Trailer Interface Module 1 |
| 75 | DEFC |
| 76 | Electric RNG BDS |
| 78 | Engine control module |
| 79 | Auxiliary battery |
| 80 | Cabin cooling pump |
| 81 | Trailer stop/turn lamp right |
| 82 | Trailer Interface Module 2 |
| 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/ Aeroshutter |
| 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 |
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