2019 Chevrolet Silverado 2500HD Fuse Box Diagram & Amperage

Quick Answer

The 2019 Chevrolet Silverado 2500HD typically has three fuse box locations: under the hood (engine compartment), inside the cabin (driver's side dash/kick panel), and in the rear (under the rear seat or in the cargo area).

Under-hood Fuse Box (Engine Compartment)

This fuse box, located on the driver's side of the engine compartment near the battery, houses fuses and relays for critical engine functions, lighting, and other high-current systems. Always verify the printed legend on your fuse box cover, as configurations can vary slightly by trim level and options.

Relay Locations (Under-hood):

The under-hood fuse box also contains several relays. Common relays include:

• Fuel Pump Relay: Controls power to the fuel pump.
• Starter Relay: Energizes the starter motor.
• Headlight Relays: Controls power for high/low beams.
• Horn Relay: Activates the vehicle's horn.
• A/C Clutch Relay: Engages the air conditioning compressor clutch.
• Trailer Brake Relay: Provides power for the trailer brake system.

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

Located on the driver's side, often behind a panel on the side of the dashboard or under the dash near the kick panel. This fuse box typically protects interior electrical components and accessories. Always consult your owner's manual and the fuse box cover for the exact layout.

Rear Under-seat / Cargo Area Fuse Box

Some 2019 Chevrolet Silverado 2500HD models may have an additional fuse box located under the rear seats or in the cargo area, often used for rear accessories, power outlets, and trailer-related circuits. Always refer to your vehicle's owner's manual for the precise location and fuse identification.

How to Test a Fuse

1. Safety First: Always turn off the ignition and any affected components before working with fuses.
2. Locate the Fuse: Refer to the fuse box diagrams and markings to find the suspicious fuse.
3. Visual Inspection: Pull the fuse straight out. Most modern fuses (blade-type) have a small wire visible through the clear plastic. If this wire is broken or melted, the fuse is blown and needs replacement.
4. Using a Test Light or Multimeter:
   • Test Light: Connect the alligator clip of the test light to a good ground point. Touch the tip of the test light to the small metal test points on the top of the fuse. If both sides light up (or show continuity), the fuse is good. If only one side lights up, or neither lights up (and there's power to the circuit), the fuse is blown.
   • Multimeter: Set your multimeter to continuity mode (looks like a speaker icon). Touch the probes to each metal test point on the top of the fuse. A blown fuse will show an open circuit (no continuity), while a good fuse will show continuity (a beep or a reading close to zero ohms).
5. Replace with Correct Amperage: Always replace a blown fuse with a new one of the exact same amperage rating and type. Using a fuse with a higher amperage can lead to overheating and electrical system damage or fire.

Common Blown Fuses on This Vehicle

While any fuse can blow, certain circuits are more prone to issues due to their constant use or high current draw. On a 2019 Chevrolet Silverado 2500HD, common blown fuses (and what to check first) can include:

• Cigar Lighter / 12V Outlets (often F7 or F8 in the instrument panel box): These often blow when charging multiple devices, using high-draw accessories, or if a coin or foreign object falls into the outlet and causes a short. Check for foreign objects in the outlets first.
• Trailer Brake Controller (F14 under-hood, or F3/F4 rear box): Issues with trailer wiring, an incorrectly wired trailer, or a short in the trailer system can cause these fuses to blow. Inspect trailer wiring connections thoroughly.
• Blower Motor (F12 under-hood): A failing blower motor, a clogged cabin air filter causing the motor to work harder, or an electrical short in the HVAC system can lead to this fuse blowing. Check cabin air filter for clogs.
• Radio / Infotainment (F1 instrument panel): While less common, issues with aftermarket installations, shorts in wiring, or internal radio faults can cause this fuse to blow. If recently installed aftermarket parts, check those connections.
• Headlights / Taillights (F5-F10 under-hood): A short in the wiring, a faulty bulb (especially if it shorts internally as it burns out), or an issue with the headlight switch or module can blow these. Check for burnt-out bulbs or damaged wiring.

Always remember that a blown fuse is often a symptom of an underlying problem, not the problem itself. If a fuse repeatedly blows, consult a qualified technician to diagnose the root cause.

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