2020 Chevrolet Silverado 1500 Fuse Box Diagram & Amperage

Quick Answer

The 2020 Chevrolet Silverado 1500 typically has three main fuse box locations: one under the hood, a second inside the cabin on the passenger-side kick panel, and a third in the rear, usually in the cargo area or under the rear seat, varying by cab style and options.

Under-Hood Fuse Box (Engine Compartment Fuse Block)

The under-hood fuse box is located on the driver's side of the engine compartment, near the battery. It contains fuses and relays for critical engine functions, lights, and trailer systems. Always refer to the legend on the fuse box cover for the most accurate information for your specific trim.

Instrument Panel Fuse Box (Passenger-Side Kick Panel)

This fuse box is located behind a cover on the passenger-side kick panel, typically accessible after opening the passenger door. It houses fuses for interior electrical components, infotainment, power accessories, and some body control modules. Fuse assignments can vary between trim levels.

Rear Under-Seat / Cargo Area Fuse Box (Body Control Module Fuse Block)

This fuse box is typically found under the rear seat (crew cab/double cab) or in the side panel of the cargo area (regular cab). It manages various body electrical functions, rear accessories, and sometimes trailer wiring specific to the rear of the vehicle. Always consult your owner's manual for the exact location and diagram for your truck.

How to Test a Fuse

Testing a fuse is a straightforward process:

1. Locate the fuse box: Refer to the Quick Answer and specific sections above to find the correct fuse box.
2. Identify the suspected fuse: Use the diagrams and tables provided, along with your vehicle's owner's manual or the legend on the fuse box lid, to find the fuse associated with the malfunctioning component.
3. Visual inspection: Many fuses have a visible wire inside. If this wire is broken or melted, the fuse is blown. However, not all blown fuses are visually obvious, especially the smaller mini-fuses.
4. Use a fuse tester or multimeter:
   • Fuse Tester: A simple circuit tester with a light will illuminate if the fuse is good. Touch the probes to the small metal test points on the top of the fuse (most modern fuses have these). If the light illuminates on both sides, the fuse is good. If it only illuminates on one side or not at all, the fuse is blown.
   • Multimeter: Set your multimeter to continuity mode (or ohms, looking for very low resistance). Remove the fuse from its slot. Touch the multimeter probes to each metal blade of the fuse. A good fuse will show continuity (a beep or very low resistance, close to 0 ohms). A blown fuse will show an open circuit (no beep or "OL" for overload/infinity).
5. Replace if blown: Always replace a blown fuse with a new fuse of the exact same amperage rating and type. Using a fuse with a higher rating can lead to serious electrical damage or fire.

Common Blown Fuses on This Vehicle

While any fuse can blow, on the 2020 Chevrolet Silverado 1500, some circuits might experience more frequent issues due to their usage or the demands placed upon them. When troubleshooting, consider these common culprits and their associated systems:

• Cigar Lighter / 12V Power Outlets (F3/F4 in Instrument Panel box, F5 in Rear box): These fuses are often overloaded by high-drain accessories like phone chargers, portable air compressors, or anything with a heating element. If your charging ports aren't working, check these first.
• Trailer Brake Control / Trailer Power (F12/F13 in Under-Hood box, F2/F3/F4 in Rear box): Issues with trailer wiring, shorts in a trailer's electrical system, or connecting an incompatible trailer can cause these fuses to blow. If you lose trailer lights or brakes, inspect these immediately.
• Blower Motor (F10 in Under-Hood box): A failing blower motor, a clogged cabin air filter causing the motor to work harder, or a short in the blower motor resistor can lead to this fuse blowing. If your fan isn't working, start here.
• Radio/Infotainment System (F1 in Instrument Panel box): While less common, certain electrical glitches or aftermarket accessory installations can sometimes cause issues with the infotainment system fuse. If your radio or display goes blank, this is a good place to start your check.

When a fuse blows, it's usually a symptom of an underlying problem, not the problem itself. Before replacing a fuse, think about what you were doing or what accessories were in use when the circuit failed. This can help pinpoint the cause and prevent the new fuse from blowing immediately.

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