GMC Sierra 3500 HD 2025 Fuse Box Info
Passenger compartment fuse box location:
The left instrument panel fuse box is located on the driver side edge of the instrument panel (If equipped with a Work Truck or Custom trim,).
The left instrument panel fuse box is located under the steering wheel on the driver side. (If equipped with a Uplevel or Base Level trim).
The right instrument panel fuse box is located on the passenger side edge of the instrument panel.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box (Left):
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Rear Heated Seats Left/Right |
| 3 | - |
| 4 | - |
| 5 | - |
| 6 | Front Heated and Ventilated Seats |
| 8 | - |
| 9 | External Object Calculation Module/Park Assist |
| 10 | - |
| 11 | - |
| 12 | Memory Seat Module 2/Passenger Power Seat |
| 13 | Export Power Take Off/Special Equipment Option 1 |
| 14 | DLC – Data Link Connector |
| 15 | - |
| 16 | AMP – Amplifier |
| 17 | Multi-Function End Gate |
| 18 | - |
| 20 | Tailgate Module |
| 22 | Rear Sliding Window |
| 23 | Driver Passenger Memory Seat Module 1/Memory Booster Module |
| 24 | - |
| 25 | - |
| 26 | - |
| 27 | - |
| Circuit Breakers |
|
| CB1 | - |
| Relays | |
| K1 | Rear Sliding Window Open |
| K2 | Rear Sliding Window Close |
| K3 | MFEG Major HI – Multi-Function End Gate Major High |
| K4 | - |
| K5 | MFEG Minor – Multi-Function End Gate Minor |
| K6 | MFEG Major LO – Mult-Function End Gate Major Low |
| K7 | - |
| K8 | - |
Passenger compartment fuse box (Right - front):
Passenger compartment fuse box (Right - back):
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | Right Doors |
| 2 | Left Doors |
| 3 | - |
| 4 | ELM 2 – Electronic Lighting Module 2 |
| 5 | ELM 7 – Electronic Lighting Module 7 |
| 6 | Front Blower |
| 8 | LF Window Switch |
| 10 | Steering Tilt (LD)/UVM (HD)/Electronic Lighting Module 5 |
| 11 | VPM/OHC Camera |
| 12 | CGM/TCP/COL LCK/DMS (LD) |
| 14 | - |
| 17 | Steering Wheel Controls |
| 18 | - |
| 19 | - |
| 20 | - |
| 21 | - |
| 22 | Heated Steering Wheel |
| 23 | - |
| 24 | - |
| 25 | SPOT LAMP LT/RT (LD) |
| 26 | USB Ports/Special Equipment Option Retained Accessory Power |
| 27 | Accessory Power Outlet/Retained Accessory Power |
| 28 | Accessory Power Outlet/Battery |
| 30 | SDM/ICS/IPC/HUD/HMDTY (HD)/HDLM (LD) |
| 31 | BCM 2 – Body Control Module 2 |
| 32 | RFA WCM AUX JACK/CSM AUX JACK/TBCS |
| 33 | BCM 4 – Body Control Module 4 |
| 34 | - |
| 40 | - |
| 41 | - |
| 42 | Electric Park Brake Switch |
| 43 | - |
| 44 | Shifter Interface Board (LD) |
| 45 | Radio Lo |
| 46 | - |
| 47 | - |
| 48 | Transmission Control Module |
| 49 | Body Control Module 1 |
| 50 | - |
| 51 | Battery 1 (HD) |
| 52 | Battery 2 (HD) |
| 53 | - |
| 54 | Sunroof |
| 55 | Driver Power Seat |
| 56 | DC DC TRANS 1 (LD) |
| 57 | DC DC TRANS 2 (LD) |
| 58 | - |
| Circuit Breakers | |
| 1 | Accessory Power Outlet 1 |
| 2 | - |
| 3 | - |
| 4 | - |
| Relays | |
| K1 | - |
| K2 | Retained Accessory Power/Accessory 1 |
| K4 | - |
| K5 | - |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 1 | - |
| 2 | - |
| 3 | Headlamp Left |
| 4 | Headlamp Right |
| 6 | - |
| 7 | ELM 4 – Electronic Lighting Module 4 |
| 8 | - |
| 9 | - |
| 10 | ELM 6 – Electronic Lighting Module 6 |
| 11 | BCM 3 – Body Control Module 3 |
| 12 | Rear Window Defogger |
| 13 | Washer Front |
| 14 | - |
| 15 | - |
| 16 | - |
| 17 | IECL 1 |
| 19 | DC/AC Inverter |
| 20 | IECR 2 (LD)/EBCM2 (HD) |
| 21 | - |
| 22 | IECL 2 |
| 24 | Fuel Heater (DSL) |
| 25 | EBCM 1 – Electronic Brake Control Module 1 |
| 26 | - |
| 27 | Horn |
| 28 | Parking Lamp Mirror/Grill (LD)/Parking Lamp Left (HD) |
| 29 | Parking Lamp Right (HD) |
| 30 | ELM 3 – Electronic Lighting Module 3 |
| 31 | ELM 1 – Electronic Lighting Module 1 |
| 32 | - |
| 33 | Not R/C |
| 34 | Radars (LD) |
| 37 | MISC IP Headliner Ignition |
| 38 | Seat Fan Ignition |
| 39 | Trailer Ignition Module |
| 40 | Misc Ignition |
| 41 | Trailer Parking Lamp |
| 42 | Tail Lamp Left (HD) |
| 44 | DEFC/ICCM Ignition (LD/HD)/FTZM Ignition (HD) |
| 45 | Secondary Axle Motor |
| 46 | Engine Control Module Ignition |
| 47 | - |
| 48 | - |
| 49 | Transmission Auxiliary Oil Pump (LD) |
| 50 | A/C Clutch |
| 51 | Transfer Case Control Module |
| 52 | Front Wiper |
| 53 | Center High-Mounted Stop Lamp |
| 54 | Tail Lamp Right (HD) |
| 55 | Trailer Back-up Lamp |
| 56 | SADS (LD)/Fuel Tank Zone Module 2 (HD) |
| 57 | TTPM/SBZA |
| 58 | Starter Motor (LD) |
| 60 | Powertrain Sensor 2 (DSL) |
| 61 | Active Hydraulic Steering (HD) |
| 62 | DEFC Batt 1/CVS |
| 63 | Trailer Brake |
| 65 | - |
| 66 | Cooling Fan Motor Left (LD) |
| 67 | - |
| 68 | DEFC Batt 2 |
| 69 | Starter Pinion (LD Gas)/Starter Motor (HD) |
| 71 | Cooling Fan Lower (LD) |
| 72 | Cooling Fan Right (LD) |
| 73 | Trailer Stop/Turn Lamp Left |
| 74 | Trailer Interface Module 2 |
| 75 | Integrated Chassis Control Module |
| 76 | Electric RNG BDS |
| 78 | Engine Control Module |
| 79 | Cabin Cool Pump 17W (LD)/Auxiliary Battery (HD) |
| 80 | Powertrain Sensor 1 (DSL) |
| 81 | Trailer Stop/Turn Lamp Right |
| 82 | Trailer Interface Module 1 |
| 83 | FTZM 1 |
| 84 | Trailer Battery |
| 85 | - |
| 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 (HD) |
| 92 | Cool Fan Clutch (HD DSL)/Aeroshutter (LD/HD) |
| Relays | |
| 5 | Rear Window Defogger |
| 18 | DC/AC Inverter |
| 23 | Fuel Heater (DSL) |
| 35 | Parking Lamp |
| 36 | Run/Crank |
| 43 | Secondary Axle Motor |
| 59 | A/C Clutch |
| 64 | Starter Motor (LD)/Cool Fan Clutch (HD DSL) |
| 70 | Starter Pinion (LD Gas)/Starter Motor (HD) |
| 77 | Powertrain |
