2016 Chevrolet Silverado 3500HD Fuse Box Diagram & Amperage

Quick Answer

The 2016 Chevrolet Silverado 3500HD has three main fuse box locations: the underhood fuse box, the instrument panel fuse box (driver's side dash/kick panel), and the rear underseat fuse box.

Underhood Fuse Box

This fuse box is located under the hood, typically on the driver's side, near the battery. It contains fuses and relays for critical engine functions, lights, and other high-power accessories. Always consult the diagram on the fuse box lid for the most accurate information.

Relays: The underhood fuse box also houses several relays, including those for the starter, fuel pump, and various lighting circuits. Their exact locations can vary; refer to the fuse box lid diagram.

Instrument Panel Fuse Box

This fuse box is located on the driver's side, typically behind a removable panel on the dash or kick panel. It protects circuits for interior accessories, lighting, and convenience features. Always verify the fuse panel legend for your specific trim.

Relays: This fuse box may contain relays for accessories like power windows, door locks, or the accessory power. Consult the fuse box diagram for exact positions.

Rear Underseat Fuse Box

For some trims of the 2016 Chevrolet Silverado 3500HD, an additional fuse box may be located under the rear seat. This box often protects circuits related to rear-seat power outlets, trailer wiring, or other heavy-duty accessories. Check your owner's manual for its exact location and contents.

Relays: Relays for features such as trailer wiring or power inverters might be found in this fuse box.

How to Test a Fuse

1. Locate the fuse: Find the suspected fuse using the diagrams above and the fuse box lid legend.
2. Visually inspect: A blown fuse will typically have a broken wire inside it. Small fuses may require a flashlight.
3. Use a fuse tester or multimeter:
   • Fuse tester: Insert the tester into the fuse's test points. If the light illuminates, the fuse is good.
   • Multimeter: Set the multimeter to continuity mode. Touch the probes to the metal test points on top of the fuse. A good fuse will show continuity (a beep or a reading close to zero ohms). If it reads OL (open loop) or no beep, the fuse is blown.
4. Replace with a new fuse: Always replace a blown fuse with a new one of the exact same amperage rating and type. Using a higher-rated fuse can cause serious electrical damage or fires.

Common Blown Fuses on This Vehicle

While any fuse can blow, some are more common than others due to the nature of the circuits they protect. If you experience an electrical issue, start by checking the fuse associated with that component.

• Cigar Lighter / 12V Outlets: These fuses (typically 15-20A) are very common to blow if you consistently overload an outlet with high-power accessories or a faulty device.
• Trailer Brake Controller / Trailer Aux Power: If you're experiencing issues with trailer lights or braking, always check the relevant fuses in the underhood or rear underseat fuse box. Overloads or shorts in trailer wiring can easily blow these.
• Radio/Infotainment System: Sometimes, a sudden power surge or an issue with an aftermarket accessory can cause the radio fuse to blow.
• Blown Blower Motor Fuse: If your HVAC fan stops working entirely, check the blower motor fuse (often a larger 30-40A fuse) in the underhood fuse box. This can sometimes blow if the blower motor is failing or if there's an obstruction causing it to draw too much current.

Before checking fuses, always ensure the affected component is securely connected and that there are no obvious exposed or damaged wires.

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