2010 Chevy Silverado Fuel Pump Relay Location: The Complete Owner's Guide

The fuel pump relay on a 2010 Chevy Silverado is located in the under-hood fuse and relay center, which sits on the driver's side near the battery, and it is clearly labeled on the underside of the fuse box cover. If your Silverado cranks but won't start, or if you don't hear the fuel pump hum when you turn the key, the relay is one of the first components you should check before assuming the pump itself has failed. This guide walks you through the exact location, how to test the relay, and what to do if it is faulty.

Why the Fuel Pump Relay Matters

The fuel pump relay acts as the electrical switch that sends power to the fuel pump inside your fuel tank. Without it, the pump never gets the 12 volts it needs to pressurize the fuel rail, so your engine will turn over but never fire. On the 2010 Silverado, the relay is part of a broader electronic fuel delivery system that also includes fuses and a fuel pump control module. A blown fuse, a stuck relay, or a wiring issue can all produce the same symptoms, so knowing how to isolate each component saves you time and money.

Locating the Relay Box on a 2010 Silverado

The main fuse and relay box on your Silverado is a large black plastic enclosure located on the driver's side fender well, right next to the battery. Open the hood and look toward the driver's side corner. The box has a cover held on by plastic tabs—simply press the tabs and lift the cover off. On the underside of that cover, you will find a printed diagram that identifies every fuse and relay by number and function. Look for the label that says "FUEL PUMP" or "F/PUMP" to pinpoint the exact relay position.

In some configurations, the 2010 Silverado also houses relays in a secondary distribution center. If you don't see the fuel pump relay in the main box, check the owner's manual for the auxiliary relay center location. The diagram on the cover is your best guide, so always verify against it rather than guessing.

How to Test the Fuel Pump Relay

Testing the relay does not require special equipment—just a multimeter and a few minutes. Here is the step-by-step process:

1. Turn the ignition off and remove the key.
2. Pull the fuel pump relay from the fuse box using your fingers or a relay puller.
3. Inspect the relay. Look for signs of charring, melting, or a burnt smell. Any visible damage means the relay is bad.
4. Check resistance. Set your multimeter to ohms and place the probes on the relay's coil terminals. You should get a resistance reading—typically between 50 and 120 ohms. An infinite reading means the coil is open, and the relay is dead.
5. Test the switch contacts. Apply 12 volts to the coil terminals using a jump wire, and listen for an audible click. Then check continuity across the switch terminals with the multimeter. If the relay clicks but shows no continuity, its internal contacts are worn out.

If you don't have a multimeter handy, there is a simpler field test. Find another relay in the same fuse box that has the same part number—often the horn relay or the AC compressor relay will match. Swap them, then turn the ignition on. If your fuel pump starts humming, the original relay is the culprit.

Checking the Fuel Pump Fuse

The relay is not the only electrical component in line. A blown fuel pump fuse produces nearly identical symptoms. On the 2010 Silverado, the fuel pump fuse is typically a 15-amp or 20-amp mini-fuse located in the same under-hood fuse block. Pull the fuse and inspect the internal metal filament. If it is broken, replace it with a fuse of the exact same amperage. Never upsize the fuse, as that can lead to wiring harness damage or even a fire.

If a new fuse blows immediately after replacement, you likely have a short circuit or a fuel pump drawing too much current. This is a sign of a failing pump motor, and replacement of the pump module will be necessary.

Listening for the Fuel Pump

Before you dig into the relay and fuse, do the easiest test first. Sit in the driver's seat, close the windows, and turn the ignition key to "ON" without cranking the engine. You should hear a brief whirring hum from the rear of the truck as the pump pressurizes the system. The sound lasts only one to two seconds. If you cannot hear it, have an assistant listen at the fuel filler cap while you cycle the key again.

If the pump primes and you have no start, the problem may be fuel pressure, not electrical. You can test pressure with a gauge connected to the Schrader valve on the fuel rail. The 2010 Silverado should show between 55 and 61 PSI with the key on and engine running. Low pressure points to a weak pump, a clogged filter, or a faulty regulator.

What If the Relay Is Fine?

If the relay clicks, the fuse is intact, and the wiring checks out, the problem may not be electrical at all. The fuel pump itself sits inside the fuel tank and cannot be serviced separately—you must replace the entire pump module. Typical symptoms of a failing pump include engine sputtering under load, difficulty starting, loss of power, or an unusual whining noise from the rear of the truck.

Before committing to a new pump, be aware that a clogged fuel filter can mimic pump failure. On the 2010 Silverado, the fuel filter is part of the pump module inside the tank, so it is not separately serviceable. If pressure is low but the pump is audible and wiring is good, the filter or pressure regulator inside the module is likely the cause, and the module must be replaced.

How to Replace the Relay

Replacing the fuel pump relay is a simple job. Purchase a new relay that matches the OEM specifications, align the pins with the socket in the fuse box, and press it firmly into place. The relay is a square plastic cube with either four or five pins. Check the diagram on the fuse box cover to confirm the orientation. Once installed, turn the ignition on and listen for the pump to prime. If the pump runs and the truck starts, the job is done.

Recommended: Choose a KEMSO Fuel Pump

If your testing leads to the conclusion that the fuel pump itself needs replacement, choosing the right part matters. KEMSO brand fuel pumps are an excellent choice for your Silverado. Every KEMSO fuel pump is built to high performance standards, is an exact OEM replacement, and comes with a lifetime warranty. This means you get factory-quality fit and reliability without paying dealer prices. The brand is trusted for its durable construction and dependable performance across a wide range of vehicle applications. To browse the full selection and find the correct pump for your 2010 Silverado, visit the KEMSO website at https://www.kemsoracing.com/. Their product lineup includes pumps for many popular trucks, SUVs, and cars, and the website makes it easy to locate the right match for your vehicle. Backed by a lifetime warranty, a KEMSO fuel pump gives you confidence that your repair will last.

Final Thoughts

Tracking down the fuel pump relay on a 2010 Chevy Silverado is straightforward once you know where to look. The relay lives in the under-hood fuse block on the driver's side, and the fuse box cover diagram tells you exactly which slot it occupies. Test the relay with a multimeter or a simple swap test before replacing parts. If the relay and fuse are good, listen for the pump prime and check fuel pressure. Only when all electrical checks pass should you suspect the pump itself. And if the pump is the problem, a KEMSO replacement offers a solid, warrantied solution. For more details on the full KEMSO product range, visit https://www.kemsoracing.com/.

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