Fuse Box Locations

The 2007 GMC Sierra has multiple fuse boxes located in different areas of the vehicle:

1. Instrument Panel Fuse Block: Located on the driver's side of the instrument panel, behind a cover.

2. Center Instrument Panel Fuse Box: Found underneath the instrument panel, to the left of the steering column.

3. Engine Compartment Fuse Block: Situated under the hood on the driver's side.

4. Auxiliary Engine Compartment Fuse Block: For hybrid models, located near the front of the engine compartment.

Instrument Panel Fuse Block

This fuse block contains fuses for various interior electrical components. Key fuses include:

  • SEO ACCY: Special Equipment Option Accessory
  • WS WPR: Windshield Wipers
  • TBC ACCY: Truck Body Controller Accessory
  • IGN 3: Ignition, Heated Seats
  • 4WD: Four-Wheel Drive System, Auxiliary Battery
  • HTR A/C: Climate Control System
  • CRUISE: Cruise Control, Power Take Off (PTO)
  • LOCK: Power Door Lock Relay (Lock Function)
  • UNLCK: Power Door Lock Relay (Unlock Function)

Engine Compartment Fuse Block

This block houses fuses for major engine and electrical system components:

  • GLOW PLUG: Diesel Glow Plugs and Intake Air Heater
  • STUD #1: Auxiliary Power (Single Battery and Diesels Only)
  • MBEC: Mid Bussed Electrical Center Power Feed
  • BLWER: Front Climate Control Fan
  • LBEC: Left Bussed Electrical Center
  • ABS: Anti-Lock Brakes
  • IGN A and IGN B: Ignition Power
  • VSES/ECAS: Vehicle Stability

Auxiliary Fuse Block (Hybrid Models)

For hybrid Sierra models, this additional fuse block includes:

  • COOL/FAN: Cooling Fan
  • COOL/FAN 1, 2, and 3: Cooling Fan Relays

Important Fuses to Note

  • Cigar Lighter/Power Outlet: Fuses #2 (Rear Accessory Power Outlet) and #16 (Accessory Power Outlets) in the Instrument Panel Fuse Box.
  • Radio/Infotainment: Usually labeled as "RADIO" or "INFO" in the Instrument Panel Fuse Block.
  • Engine Control Module (ECM): Found in the Engine Compartment Fuse Block, often labeled as "ECM" or "PCM".

Fuse Replacement Tips

  • Always replace a blown fuse with one of the same amperage.
  • If a replacement fuse blows immediately, there may be a larger electrical issue requiring professional diagnosis.
  • Keep spare fuses in your vehicle for emergencies.
  • Never substitute a fuse with a higher amperage, as this can cause electrical system damage.

FAQs About 2007 GMC Sierra Fuse Box

    • How do I access the instrument panel fuse block?
      Open the driver's side door and locate the cover on the side of the dashboard. Gently pry it open to access the fuses.
    • What should I do if I can't find a specific fuse?
      Consult your owner's manual for a detailed fuse diagram, or contact a GMC dealership for assistance.
    • Is it safe to replace fuses myself?
      Yes, as long as you use the correct amperage and follow safety precautions. If unsure, seek professional help.