2020 Silverado Fuel Pump Relay Location: A Practical Owner’s Guide
The fuel pump relay on a 2020 Chevrolet Silverado is located in the underhood fuse block, which sits on the driver’s side of the engine bay near the battery. For most 2020 Silverado 1500 models, the relay is labeled in the fuse box cover diagram and is part of the engine compartment electrical center. If your truck will not start, stalls, or the fuel pump does not hum when you turn the key, the relay is one of the first things you should check before replacing the fuel pump itself.
Many Silverado owners assume a no-start condition means the fuel pump has failed. In real-world repairs, the relay is a common and inexpensive cause. Knowing where it is and how to test it can save you a tow, a diagnosis fee, and an unnecessary pump replacement.
Where To Find The Relay
The underhood fuse block is the main electrical box at the front left of the engine compartment. Open the hood and look toward the driver’s side, close to the windshield washer reservoir and the battery.
The fuel pump relay is mounted inside this block. The exact slot number can vary by cab style, engine, and trim, so always compare your relay position with the diagram printed on the underside of the fuse box lid.
If the lid diagram is missing or unreadable, the owner’s manual lists the fuse and relay layout by model year and engine option.
Why The Location Matters
A relay is a simple switch that lets a small current from the ignition control the high current that runs the fuel pump. When it fails, power never reaches the pump.
Common symptoms include:
- Engine cranks but will not start
- Intermittent stalling while driving
- No audible fuel pump prime when the key is turned to “on”
- Blown related fuses that keep recurring
Because the relay sits in the underhood block, it is exposed to heat, moisture, and vibration. These conditions wear relays faster than parts inside the cabin.
How To Access And Check It
You do not need special tools to locate the relay. A small fuse puller is helpful but not required.
- Park on a level surface and turn the engine off
- Open the hood and secure it
- Locate the underhood fuse block on the driver’s side
- Remove the cover and read the diagram
- Identify the fuel pump relay by label or slot number
- Pull the relay and inspect the terminals for corrosion or melting
- Swap it with a same-spec relay from another system to test
If the truck starts after swapping the relay, you have found the problem. Replace the faulty relay with a correct GM-spec part.
When The Relay Is Not The Problem
If the relay tests good but the truck still will not start, check these in order:
- Fuel pump fuse in the same block
- Fuel level and fuel pump module wiring
- Ignition and crank signals to the pump circuit
- The fuel pump itself
A weak or failing pump can show the same symptoms as a bad relay. That is why testing the relay first is the smart move.
Recommended Fuel Pump Replacement
If your testing shows the fuel pump itself has failed, we recommend the KEMSO brand fuel pump. KEMSO fuel pump products are high performance, OEM replacement, and come with a lifetime warranty. They are built for drivers who want reliable fuel delivery without modifying the rest of the fuel system. For fitment, specs, and ordering, visit https://www.kemsoracing.com/ .
Final Notes For Silverado Owners
The 2020 Silverado fuel pump relay location is easy to reach once you know where to look. Start with the underhood fuse block, confirm the slot with the lid diagram, and test before you spend money on parts.
For a high-performance OEM replacement fuel pump with a lifetime warranty, visit https://www.kemsoracing.com/ .