Where are the GMC Sierra Fuse Boxes located in 2021 Ford Focus ?
2021 GMC Sierra has 3 main boxes with fuses and relays. Two in the cabin(Passenger Compartment) one each on either side of the Instrument Panel and under the hood (Engine Compartment).
2021 GMC Sierra Under Dash Fuse Box and Relay Location
The Fuse and Relay boxes are located under the dashboard, on the passenger side and the Driver Side as well, and is covered with trim.
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.
To access the back of the block:
1) Push the tab at the top of fuse block down;
2. Pull the top of the block outward;
3. Reverse Steps 1-2 to reinstall.
2021 GMC Sierra under Dash Fuse Box Layout
2021 GMC Sierra under Dash Fuse and relay Box Diagram(Left)
2021 GMC Sierra Under Dash Fuse and relay Box Details(Left)
Assignment of the fuses in the Left Instrument Panel Fuse Block
| No. | Protected Components |
|---|---|
| F1 | Rear Heated Seats Left/ Right |
| F3 | – |
| F4 | – |
| F5 | Multifunction End Gate |
| F6 | Heated and Ventilated Seats Left/Right |
| F8 | – |
| F9 | Passive Entry Passive Start/ Spare |
| F10 | – |
| F11 | – |
| F12 | Passenger Power Seat |
| F13 | Export Power Take Off/ Special Equipment Option 1 |
| F14 | – |
| F15 | – |
| F16 | Amplifier |
| F17 | – |
| F18 | – |
| F20 | Endgate |
| F22 | Rear Sliding Window |
| F23 | – |
| F24 | – |
| F25 | – |
| F26 | – |
| F27 | – |
| CB1 | – |
| Relays | |
| K1 | Rear Sliding Window Open |
| K2 | Rear sliding Window Close |
| K3 | Multifunction End Gate Major 1 |
| K4 | Multifunction End Gate Major 1 |
| K5 | Multifunction End Gate Minor 2 |
| K6 | Multifunction End Gate Minor 2 |
| K7 | – |
| K8 | – |
2021 GMC Sierra under Dash Fuse and relay Box Diagram(Right)
2021 GMC Sierra Under Dash Fuse and relay Box Details(Right)
Assignment of the fuses in the Right Instrument Panel Fuse Block
| No. | Protected Components |
|---|---|
| F1 | Right Doors |
| F2 | Left Doors |
| F3 | Universal Garage Door Opener |
| 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 | Ventilated Seats |
| F21 | NOT R/C |
| F22 | Heated Steering Wheel |
| F23 | MISC R/C |
| F24 | 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 |
| F43 | – |
| F44 | 2021: Active vibration management |
| 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 |
| CB1 | Accessory Power Outlet 2 |
| CB2 | Accessory Power Outlet 1/ Cigarette Lighter |
| CB3 | 2021: Accessory power outlet 3 |
| CB4 | 2021: Accessory power outlet 4 |
| Relays | |
| K1 | Run/Crank |
| K2 | Retained Accessory Power/ Accessory 1 |
| K4 | 2021: Retained accessory power/ Accessory 2 |
| K5 | – |
2021 GMC Sierra Under Hood Fuse and Relay box location
The engine compartment fuse block is in the engine compartment, on the passenger side of the vehicle for 1500 and driver side of vehicle for 2500/3500.
2021 GMC Sierra Under Hood Fuse Box Layout
2021 GMC Sierra under Hood Fuse and relay Box Diagram
2021 GMC Sierra under hood Fuse Box Details
Assignment of the fuses in the Engine compartment fuse box
| No. | Protected Components |
|---|---|
| 1 | High-beam left |
| 2 | High-beam right |
| 3 | Headlamp left |
| 4 | Headlamp right |
| 6 | – |
| 7 | – |
| 8 | Fog Lamp |
| 9 | – |
| 10 | – |
| 11 | Police Upfitter |
| 12 | – |
| 13 | Washer Front |
| 14 | Washer Rear |
| 15 | – |
| 16 | – |
| 17 | IECL 1 |
| 19 | DC/AC Inverter |
| 20 | IECR 2 (LD)/EBCM 2 (HD) – Electronic Brake Control Module |
| 21 | – |
| 22 | IECL 2 |
| 24 | Electronic Brake Control Module 1 |
| 25 | – |
| 26 | – |
| 27 | Horn |
| 28 | – |
| 29 | – |
| 30 | – |
| 31 | – |
| 32 | Rear Window Defogger |
| 33 | Heated Mirror |
| 34 | Parking Lamp Left |
| 37 | – |
| 38 | – |
| 39 | – |
| 40 | Misc ignition |
| 41 | Trailer Parking Lamp |
| 42 | Park Lamp Right |
| 44 | – |
| 45 | – |
| 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 | Semi Active Damping System |
| 57 | Side Blind Zone Alert |
| 58 | Starter motor (LD and HD DSL) |
| 60 | Active Fuel Management 1 |
| 61 | Vehicle Emission System |
| 62 | Integrated Chassis Control Module/CVS – Canister Vent Solenoid |
| 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/Lower |
| 73 | Trailer Stop/Turn Lamp Left |
| 74 | Trailer Interface Module 1 |
| 75 | Diesel Exhaust Fluid Controller |
| 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 | Fuel Tank Zone Module |
| 84 | Trailer Brake |
| 85 | Engine |
| 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 | Aeroshutter |
| Relays | |
| 5 | Headlamp |
| 18 | DC/AC inverter |
| 23 | Rear window defogger |
| 35 | Parking lamp |
| 36 | Run/Crank |
| 43 | – |
| 59 | A/C clutch |
| 64 | Starter Motor (LD & HD DSL) |
| 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.
