2017 GMC Sierra 2500HD Fuse Box Diagram & Amperage

Quick Answer

The 2017 GMC Sierra 2500HD has three main fuse box locations: under the hood (engine compartment), on the driver's side instrument panel (dash kick-panel), and in the rear under the seat (rear under-seat fuse block).

Under-Hood Fuse Box

The under-hood fuse box is located in the engine compartment, on the driver's side, near the battery. This fuse box contains fuses and relays for critical engine functions, lighting, and other high-current circuits. Always refer to the fuse diagram on the inside of the fuse box cover for the most accurate information specific to your vehicle's trim level.

Relay Locations (Under-Hood):

• R1: Fuel Pump Relay
• R2: Starter Relay
• R3: HVAC Blower Motor Relay
• R4: Horn Relay
• R5: A/C Clutch Relay
• R6: High Beam Headlight Relay (Left)
• R7: High Beam Headlight Relay (Right)
• R8: Low Beam Headlight Relay

Driver's Side Instrument Panel (Dash Kick-Panel) Fuse Box

This fuse box is located on the driver's side of the dashboard, behind a removable panel, often accessible when the driver's door is open. It typically houses fuses for interior electrical components, infotainment, power accessories, and more.

Rear Under-Seat Fuse Block

Some 2017 GMC Sierra 2500HD models, particularly those with specific options or the crew cab configuration, may have a rear fuse block located under the rear seat. This box often contains fuses for rear accessories, power outlets, and trailer-related circuits.

How to Test a Fuse

Testing a fuse is a straightforward process. You will need a fuse puller (usually found in one of the fuse boxes) and a multimeter or a fuse test light.

1. Safety First: Ensure the vehicle's ignition is off before attempting to test or replace any fuses.
2. Locate the Blown Fuse: Visually inspect the fuse for a broken wire inside. If you can't tell by looking, use a test light or multimeter.
3. Use a Test Light: Touch one end of the test light to a known good ground point and the other end to the small metal test points on top of the fuse. Both sides should light up. If only one side lights up, the fuse is blown. For a multimeter, set it to continuity mode. Touch the probes to each metal test point. A good fuse will show continuity; a blown fuse will show an open circuit.
4. Replace the Fuse: If a fuse is blown, replace it with a new one of the exact same amperage rating and type. Using a fuse with a higher amperage can cause severe electrical damage or even a fire.

Common Blown Fuses on This Vehicle

While any fuse can blow, some are more commonly encountered on the 2017 GMC Sierra 2500HD due to common accessory usage or typical wear and tear. If you're experiencing an electrical issue, it's a good starting point to check these fuses first:

• Cigar Lighter / 12V Outlets (Dash Kick-Panel F7, Under-Hood F14/F15): These fuses are often blown due to overloads from charging multiple devices or using high-power accessories. If your phone charger or air compressor stops working, check these.
• Trailer Brake Controller (Under-Hood F11, Rear Under-Seat F5): Issues with trailer wiring or an overloaded trailer can cause these fuses to blow. If your trailer brakes aren't working, these are the first culprits.
• Blower Motor (Under-Hood F9): A failing blower motor or a restricted cabin air filter can cause the blower motor to draw excessive current, blowing this fuse. If your HVAC fan stops working, check this.
• Headlights (Under-Hood F6, F7): While less common, a faulty bulb or a short in the headlight wiring can blow the respective headlight fuse. If one or both headlights are out, check these.
• Radio/Infotainment (Dash Kick-Panel F1): Problems with the radio unit or connected devices can sometimes cause this fuse to blow, leading to a dead infotainment system.

Always remember to consult your owner's manual and the fuse legend printed on the inside of the fuse box covers for the most accurate and specific fuse information for your 2017 GMC Sierra 2500HD, as fuse configurations can vary slightly between trim levels and optional equipment.

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