2022 GMC Sierra 1500 — Fuse Box Diagram & Amperage

Quick Answer: Fuse Box Locations

Your 2022 GMC Sierra 1500 has three primary fuse box locations to protect its electrical circuits. Misplacing a tool or a short in a connected device can lead to a blown fuse, and knowing where to look is the first step in getting power restored.

• Under-Hood Fuse Block: Located in the engine bay, on the driver's side. This box contains higher-amperage fuses and relays for critical systems like the engine, fuel pump, ABS, and headlights.
• Left Instrument Panel Fuse Block: Located on the driver's side of the dashboard, accessible when you open the driver's door. This panel covers many interior functions, including the instrument cluster and airbags.
• Right Instrument Panel Fuse Block: Located on the passenger's side of the dashboard, accessible when you open the passenger's door. This panel handles fuses for the blower motor and power outlets.

Important Note: The fuse numbers and circuits listed below are for the most common configuration. Your truck's specific layout may vary based on its trim level (Pro, SLE, SLT, AT4, Denali) and optional equipment. Always verify the fuse diagram printed on the inside of the fuse box cover before replacing a fuse.

Under-Hood Fuse Block

This is the main power distribution center for your Sierra. To access it, open the hood and locate the large, black plastic box on the driver's side, near the fender. Release the clips or tabs on the cover to expose the fuses and relays.

This box also houses critical relays, which are small electro-mechanical switches. Common relays in this location include the Starter Relay, Fuel Pump Relay, A/C Clutch Relay, and various relays for the powertrain control module.

Left Instrument Panel Fuse Block (Driver's Side)

This fuse panel is hidden behind a trim panel on the outboard side of the dashboard. Open the driver's door fully to see and access the cover.

Right Instrument Panel Fuse Block (Passenger's Side)

Similar to the driver's side, this fuse panel is located behind a trim cover on the end of the dashboard, which is accessible with the passenger door open.

How to Test a Fuse

If a component like your radio or headlights stops working, a blown fuse is a likely culprit. Testing a fuse is simple.

1. Visual Inspection: Pull the suspect fuse using the puller tool often found in the fuse box lid. Hold the fuse up to a light source. Inside the plastic body, you will see a small metal filament. If this filament is broken or looks melted, the fuse is blown and needs to be replaced with a new one of the exact same amperage rating.

2. Using a Multimeter: For a more definitive test, set a multimeter to the continuity setting (it often looks like a sound wave symbol). Touch one probe to each blade of the fuse. If the multimeter beeps, the fuse is good. If it remains silent, the fuse is blown.

Never replace a fuse with one of a higher amperage rating. The fuse is a safety device designed to be the weak link; using a higher-rated fuse can cause a fire or severe damage to the vehicle's wiring or the component it protects.

Common Blown Fuses on the 2022 GMC Sierra 1500

While any fuse can blow, some are more common than others due to the nature of the circuits they protect.

• 12V Power Outlet / Cigar Lighter (F13, F14): This is by far the most common fuse to blow. It is typically caused by a faulty or low-quality phone charger, a coin falling into the outlet, or a device that draws too much power. If this fuse blows, first check the outlet for obstructions, then unplug any devices before replacing the fuse.
• Trailer Brake / Lights (F25): If you frequently tow, these fuses can be a common failure point. The issue is often not with the truck itself, but with the trailer's wiring. A short-to-ground or frayed wire on the trailer can cause the fuse in the truck to blow instantly. If the trailer light fuse blows, the first place to check is the trailer wiring harness and connector for damage or corrosion.
• Fuel Pump (F10): If your Sierra cranks over but refuses to start, the fuel pump fuse could be the issue. If you replace the fuse and it blows again immediately, this could indicate a problem with the fuel pump relay or the fuel pump itself, which may require professional diagnosis.

If a fuse blows repeatedly, it signals an underlying electrical problem that needs to be addressed. Simply replacing the fuse will not fix the root cause.

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