2019 Chevrolet Suburban – Fuse Box Diagram & Amperage

Quick Answer

Your 2019 Chevrolet Suburban has a total of three fuse boxes: one under the hood, one in the passenger side kick panel, and one in the rear cargo area.

Underhood Fuse Box

The underhood fuse box is located on the driver's side of the engine bay, near the battery. It contains fuses for critical engine and accessory functions, as well as several relays.

Relay Locations (Underhood Fuse Box):

• R1: Starter Relay
• R2: Fuel Pump Relay
• R3: Low Beam Headlight Relay
• R4: High Beam Headlight Relay
• R5: Blower Motor Relay
• R6: A/C Clutch Relay
• R7: Cooling Fan Relay 1
• R8: Cooling Fan Relay 2

Passenger Side Kick Panel Fuse Box

This fuse box is located behind a panel on the passenger side kick panel, near the floor. It typically handles interior electrical components.

Rear Cargo Area Fuse Box

Located in the rear cargo area, usually on the driver's side panel, this fuse box manages components linked to the rear of the vehicle, including additional power outlets and some towing features.

Important Note on Trim Variations: Fuse box configurations can vary slightly between different Suburban trim levels (e.g., LS, LT, Premier) and specific optional equipment. Always consult the printed legend on the inside of your fuse box cover for the most accurate information for your specific vehicle.

How to Test a Fuse

Testing a fuse is a simple process that can help diagnose electrical issues. You'll need a fuse puller (often located in one of the fuse boxes) and a multimeter or a fuse tester tool.

1. Locate the fuse: Identify the suspected fuse using the diagrams above and the legend on your fuse box cover.
2. Turn off the vehicle and ignition: Ensure no power is flowing through the circuits.
3. Remove the fuse: Use the fuse puller to carefully remove the fuse from its slot. Never use metal tools that could short circuits.
4. Visually inspect: Many fuses have a visible wire inside. If this wire is broken or melted, the fuse is blown and needs replacement.
5. Test with a multimeter (for less obvious breaks): Set your multimeter to the continuity setting (often indicated by a speaker icon). Touch the probes to the metal contacts on both ends of the fuse. If the multimeter beeps or shows a reading close to zero ohms, the fuse is good. If there's no sound or an "OL" (open circuit) reading, the fuse is blown.
6. Replace the fuse: If the fuse is blown, replace it with a new one of the exact same amperage (A) and color. Using a fuse with a higher amperage can cause serious damage to your vehicle's electrical system or even lead to a fire.

Common Blown Fuses on This Vehicle

While fuses can blow for various reasons, some circuits are more prone to issues due to their constant use or the type of components they protect. On the 2019 Chevrolet Suburban, commonly blown fuses include:

• Cigar Lighter / 12V Power Outlets: These fuses often blow due to overcurrent from charging multiple devices or using high-power accessories. If your phone charger or portable air compressor isn't working, check these fuses first.
• Blower Motor: Problems with the HVAC system, such as a seized blower motor or a short in the wiring, can cause this fuse to blow, leading to no air coming from the vents.
• Radio / Infotainment System: Issues with aftermarket accessories, internal shorts in the unit, or even a disconnected battery can sometimes lead to this fuse blowing, resulting in a blank screen or no audio.
• Tail/Brake Lights: A faulty bulb or a short in the wiring can cause these fuses to blow, leading to safety concerns. Always check the bulbs first if you notice a taillight or brake light isn't working.

What to check first: Before replacing a fuse, especially if it blows repeatedly, investigate the circuit for potential problems. Overloaded circuits, faulty components, or wiring shorts are common culprits. Simply replacing a blown fuse without addressing the underlying cause will likely result in the new fuse blowing as well.

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