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In this article, you will find information about the fuses of the GMC Sierra 2500/3500HD (GMT T1XX; models 2024) including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in GMC Sierra 2500/3500HD
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems. To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. If there is a problem on the road and a fuse needs to be replaced, there are some spare fuses and a fuse puller in the left instrument panel fuse block.
Caution!
- Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers.
- Installation or use of fuses that do not meet GM’s original fuse specifications is dangerous. The fuses could fail, and result in a fire.
- Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
Location of Fuse Boxes
Engine Compartment Fuse Block:
The engine compartment fuse block is in the engine compartment, on the passenger side of the vehicle. Lift the cover to access the fuse block.
Instrument Panel Fuse Block (Left):
If equipped with a Work Truck or Custom trim, the left instrument panel fuse block access door is on the driver side edge of the instrument panel.
If equipped with a Uplevel or Base Level trim, the left instrument panel fuse block access door is under the steering wheel on the driver side. A fuse puller is attached to the access door. Pull off the cover to access the fuse block.
Instrument Panel Fuse Block (Right):
The right instrument panel fuse block access door is on the passenger side edge of the instrument panel. Pull off the cover to access the front of the fuse block.
To access the back of 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.
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart.
Fuse Box Diagrams
2024
Engine Compartment Fuse Block
| № | Usage |
|---|---|
| 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) / EBCM 2 (HD) |
| 21 | - |
| 22 | IECL 2 |
| 24 | Fuel Heater (DSL) |
| 25 | EBCM1 - 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 | FTZM1 |
| 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) |
| 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 |
Instrument Panel Fuse Block (Left)
| № | Usage |
|---|---|
| F1 | Rear Heated Seats Left/Right |
| F3 | - |
| F4 | - |
| F5 | Spare / MFEG - 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 | AMP - Amplifier |
| F17 | - |
| F18 | - |
| F20 | Endgate |
| F22 | Rear Sliding Window |
| F23 | - |
| F24 | - |
| F25 | - |
| F26 | - |
| F27 | - |
| CB1 | - |
| K1 | Rear Sliding Window Open |
| K2 | Rear sliding Window Close |
| K3 | MFEG Major 1 - Multifunction End Gate Major 1 |
| K4 | MFEG Minor 1 - Multifunction End Gate Minor 1 |
| K5 | MFEG Minor 2 - Multifunction End Gate Minor 2 |
| K6 | MFEG Major 2 - Multifunction End Gate Major 2 |
| K7 | - |
| K8 | - |
Instrument Panel Fuse Block (Right)
| № | Usage |
|---|---|
| F1 | Right Doors |
| F2 | Left Doors |
| F3 | - |
| F4 | ELM 2 - Electronic Lighting Module 2 |
| F5 | ELM 7 - Electronic Lighting Module 7 |
| F6 | Front Blower |
| F8 | LF Window Switch |
| F10 | Steering Tilt (LD) / UVM (HD) / Electronic Lighting Module 5 |
| F11 | VPM / OHC Camera |
| F12 | CGM / TCP/COL LCK / DMS (LD) |
| F14 | - |
| F17 | Steering Wheel Controls |
| F18 | - |
| F19 | - |
| F20 | - |
| F21 | - |
| F22 | Heated Steering Wheel |
| F23 | - |
| F24 | - |
| F25 | SPOT LAMP LT/RT (LD) |
| F26 | USB Ports / Special Equipment Option Retained Accessory Power |
| F27 | Accessory Power Outlet / Retained Accessory Power |
| F28 | Accessory Power Outlet / Battery |
| F30 | SDM / ICS / IPC / HUD / HMDTY (HD) / HDLM (LD) |
| F31 | BCM 2 - Body Control Module 2 |
| F32 | RFA WCM AUX JACK / CSM AUX JACK / TBCS |
| F33 | BCM 4 - Body Control Module 4 |
| F34 | - |
| F40 | - |
| F41 | - |
| F42 | Electric Park Brake Switch |
| F43 | - |
| F44 | Shifter Interface Board (LD) |
| F45 | Radio Lo |
| F46 | - |
| F47 | - |
| F48 | Transmission Control Module |
| F49 | Body Control Module 1 |
| F50 | - |
| F51 | Battery 1 (FID) |
| F52 | Battery 2 (FID) |
| F53 | - |
| F54 | Sunroof |
| F55 | Driver Power Seat |
| F56 | DC DC TRANS 1 (LD) |
| F57 | DC DC TRANS 2 (LD) |
| F58 | - |
| 1 | Accessory Power Outlet 1 |
| 2 | - |
| 3 | - |
| 4 | - |
| K1 | - |
| K2 | Retained Accessory Power / Accessory 1 |
| K4 | - |
| K5 | - |