2023 Chevrolet Silverado 2500HD Fuse Box Diagram & Amperage Guide

As an ASE-certified master technician, one of the most common electrical issues I see on heavy-duty trucks involves a simple blown fuse or faulty relay. Whether you have lost power to your trailer brakes, the infotainment screen went black, or your fuel pump isn't priming, knowing where your fuses are and what they control is essential. This guide provides a detailed reference for the 2023 Chevrolet Silverado 2500HD.

Note: The exact fuse numbers, amp ratings, and positions can vary slightly based on your truck's specific trim level, engine (6.6L Gas vs. 6.6L Duramax Diesel), and optional equipment. Always verify the printed legend on the inside of your fuse box lid before replacing a fuse.

Quick answer

The 2023 Chevrolet Silverado 2500HD has two primary fuse box locations:

1. Engine Compartment Fuse Block (Under-hood): Located on the driver’s side of the engine bay, near the battery.
2. Instrument Panel Fuse Block (Dash): Located on the passenger side of the instrument panel, behind a removable plastic cover (accessible when the passenger door is open).

Note: Heavy-duty Silverados do not feature a traditional trunk/cargo fuse box, though some upfitter auxiliary fuse blocks may be installed under the dash or rear seat depending on commercial configurations.

Engine Compartment Fuse Block

The under-hood fuse box houses the main power distribution components, including high-amp J-case fuses and relays for the engine control module (ECM), fuel system, ABS, and trailer lighting.

Instrument Panel Fuse Block

The instrument panel fuse block primarily handles interior electronics, cabin comfort features, and driver-assist modules. You will find it on the right side (passenger side) of the dashboard.

How to test a fuse

Testing a fuse is a straightforward process that can save you hours of diagnostic time. Here is the professional way to do it:

1. Visual Inspection: Pull the suspected fuse using fuse pullers or needle-nose pliers. Hold it up to the light. If the internal metal wire (filament) is broken, melted, or blackened, the fuse is blown and needs replacement.
2. Use a Test Light: The most efficient way to test fuses without removing them is with a 12V test light. Turn the key to the "ON" position. Attach the test light clamp to a solid metal ground. Touch the probe to the small metal test tabs exposed on the top of the fuse. If the test light illuminates on both sides, the fuse is good. If it lights up on only one side, the fuse is blown.
3. Use a Digital Multimeter (DMM): Set your multimeter to the continuity or ohms (Ω) setting. Touch a probe to each test tab on top of the fuse. A reading close to 0 ohms or a continuous beep means the fuse is intact. A reading of "OL" (Open Loop) or no beep indicates a blown fuse.

Always replace a blown fuse with one of the exact same amperage. Putting a higher-amp fuse in a circuit can cause wiring damage or electrical fires.

Common blown fuses on this vehicle

Based on my experience in the shop with the T1XX generation of Chevy HD trucks, here are the most common fuses that blow and what you should check first:

• Trailer Lighting and Brake Fuses (F42, F62 Under-hood): The 2500HD is built for towing, which means trailer wiring takes a beating. If you lose trailer lights or trailer brakes, check these fuses first. A blown trailer fuse is almost always caused by a short circuit in the trailer's wiring harness or a corroded 7-pin connector, not a fault within the truck itself.
• 12V Auxiliary Power Outlets (F14, F18 Instrument Panel): Passengers frequently drop coins into the 12V sockets or plug in cheap, faulty phone chargers and power inverters that draw more than 20 amps. If your charger stops working, inspect the socket for debris and replace the 20A fuse.
• Fuel Pump Fuse (F11 Under-hood): If your Silverado cranks but won't start, listen for the fuel pump hum when you turn the key. If it's silent, check the fuel pump fuse and relay. While it could just be a tired relay, a repeatedly blowing fuel pump fuse often indicates a failing fuel pump motor that is drawing excessive current.
• Radio / Infotainment (F02 Instrument Panel): Modern infotainment screens can sometimes freeze or fail to boot up. While not always a blown fuse, pulling this 15A fuse for a few minutes to hard-reset the radio module is a common and effective trick for clearing software glitches.

Electrical issues can be frustrating to track down. If you keep blowing the same fuse, you have an active short to ground or a failing component that requires professional diagnosis. Find a trusted shop on Repairius.