2009 Silverado Fuel Pump Relay: Location, Testing, and Replacement Guide

The bottom line up front: On a 2009 Chevy Silverado 1500, 2500, or 3500, the primary fuel pump relay sits inside the underhood fuse block, typically mounted on the driver’s side near the battery. If your truck cranks but won’t start, stalls unexpectedly, or you don’t hear the fuel pump hum when you turn the key, the relay is one of the first things to check. Replacing it takes about five minutes and costs between $12 and $45 for the part, with no special tools required. This guide walks you through the exact location, how to test the relay, how to bypass it for diagnosis, and what to do if the pump itself is the problem.

Where Exactly Is the Fuel Pump Relay on a 2009 Silverado?

The fuel pump relay for your 2009 Silverado lives in the main underhood fuse block. Follow these steps to get to it:

  1. Open the hood and look for the fuse block. On most 2009 Silverado models, this box is located on the driver’s side, mounted near the fender or directly on the battery tray.
  2. Remove the cover of the fuse block. You will see a diagram on the underside of the cover that labels each fuse and relay.
  3. Look for "FUEL PMP" or "F/PMP" – that is the fuel pump relay.
  4. Identify the relay: The fuel pump relay is one of the standard cube-shaped relays with four or five prongs. It is usually the same size and color as other relays in the box, so the label is your best friend here.
  5. Pull the relay straight out with your fingers or a pair of needle-nose pliers if it’s snug. No tools are required for this step.

For the 2009 Silverado Hybrid (RPO code HP2 or LY6), there are actually two fuel pump relays: the primary one in the underhood fuse block, and a secondary relay located on the left side of the engine compartment, mounted to the frame or fender area. The secondary relay controls the second fuel pump in the auxiliary fuel tank. If you own the hybrid and are experiencing fuel delivery issues, check both relays.

Some sources also note that the secondary fuel pump relay on certain 2009 Silverado configurations is located on the left side frame near the rear of the vehicle, according to factory service information. Because relay locations can vary slightly by trim and option package, always verify the exact spot using your owner’s manual or the diagram printed on the fuse box cover.

What Does the Fuel Pump Relay Actually Do?

The fuel pump relay is an electro-mechanical switch that sits between the ignition circuit and the fuel pump. When you turn the key to the "ON" position, the relay closes and sends battery voltage to the fuel pump so it can pressurize the fuel system for a few seconds. Once the engine starts, the relay keeps the pump running while the engine is on.

Without a working relay, voltage never reaches the fuel pump, and your engine gets no gas at all. In the 2009 Silverado’s fuel system, the pump is located inside the fuel tank – it "pushes" fuel to the fuel rail rather than "pulling" it, which is why it sits submerged in the tank. The relay is the gatekeeper that decides whether the pump gets power.

Symptoms of a Failing Fuel Pump Relay

A bad fuel pump relay can produce several warning signs. Here are the most common ones:

  1. Engine cranks but won’t start. This is the most telltale symptom. If the relay is dead, the fuel pump gets no power, so no fuel reaches the engine. The engine will crank all day but never fire up.
  2. Fuel pump doesn’t prime. When you turn the ignition to "ON" (without cranking), you should hear a brief whirring sound from the fuel tank area. If that humming sound is missing, the relay is a prime suspect.
  3. Intermittent stalling. If the relay has burnt contact points, it might work when cool and fail when hot, causing the truck to suddenly stall while driving. This can be dangerous, especially at highway speeds.
  4. Difficulty starting when warm. A failing relay might work when cold but stop functioning after the engine bay heats up, leading to hard starts after short stops.
  5. Check engine light. While not always specific to the relay, a fuel delivery-related trouble code might appear. Use an OBD-II scanner to check for codes. One possible code is P0087, which detects that the fuel rail/system pressure is too low.

Important note: A shorted fuel pump relay can also cause the opposite problem—the pump runs continuously even with the engine off, which drains the battery and can overheat the pump. If you notice your battery dying overnight, this is worth checking.

How to Test the Fuel Pump Relay

Before you spend money on a new relay, it’s smart to test the one you have. A faulty relay is a common cause of a no-start condition on the 2009 Silverado. Here’s how to check it:

Step 1: Listen for the pump. Turn the ignition to the ON position – do not crank the engine. Listen carefully near the fuel tank (or have a friend listen at the fuel filler cap). You should hear a brief whirring hum from the fuel pump for one to two seconds. That hum tells you the relay is sending power to the pump.

Step 2: Inspect the relay. If you don’t hear the pump, remove the relay from the fuse block and inspect it. Look for burnt contacts, discoloration, or a melted case. Any of those signs means the relay is bad.

Step 3: Test the coil resistance. Use a multimeter to check the relay’s coil resistance. Place the meter leads across the two coil terminals (usually the two smaller prongs, labeled 85 and 86). You should see a resistance reading between 50 and 120 ohms. If you get infinite resistance (open circuit), the relay is dead.

Step 4: Test the switch contacts. Apply 12V power to the coil terminals from a battery. You should hear a distinct "click" as the internal switch closes. Then measure resistance across the two larger prongs (the normally open contacts, labeled 30 and 87). It should read near 0 ohms when energized. If it stays open, the relay is faulty.

No multimeter? There’s a simpler approach: swap the suspected relay with a known-good relay of the same type from your fuse box (like the horn relay) and see if the fuel pump starts working. This quick test can confirm the problem without any special tools.

If the relay tests fine but the pump doesn’t run, the problem likely lies in the fuel pump itself, the wiring, or the fuse.

How to Replace the Fuel Pump Relay on a 2009 Silverado

Once you’ve confirmed the relay is bad, replacement is straightforward. Follow these steps:

Step 1: Safety first. Disconnect the negative battery terminal to shut off all power and prevent electrical shorts. This is non-negotiable when working with electrical components.

Step 2: Locate the relay. The main fuel pump relay in the 2009 Silverado is typically in the under-hood fuse box near the battery.

Step 3: Pull the old relay out. Grasp it firmly and pull straight up. If it’s snug, use a pair of needle-nose pliers.

Step 4: Install the new relay. Push it firmly into the same socket until it clicks into place. Make sure it’s seated fully.

Step 5: Reconnect the battery. Turn the ignition to "ON" and listen for the fuel pump prime. If you hear the hum, you’re good to go.

Step 6: Check for other issues. If the new relay fixes the no-start condition, you’re done. If not, move on to checking the fuse, wiring, or the pump itself.

How to Bypass the Relay for Diagnosis

Sometimes you need to confirm that the fuel pump works when given direct power. This is a common diagnostic step. Since the 2009 Silverado doesn’t have a manual reset button for the fuel pump like some Ford trucks do, bypassing the relay is the way to test the pump directly.

Warning: This procedure involves working with live battery power and fuel system components. Wear safety glasses and work in a well-ventilated area. Disconnect the battery before connecting or disconnecting any fuel pump connector.

To bypass the relay:

  1. Locate the relay in the underhood fuse block and pull it out.
  2. Use a fused jumper wire to connect the two large terminals in the relay socket (the ones corresponding to the normally open contacts). This is the terminal that gets power from the battery and the terminal that sends power to the fuel pump.
  3. Turn the ignition to ON – this will power the pump circuit through your jumper. The fuel pump should run continuously while the jumper is in place.

If the pump runs with the jumper in place, the relay is the problem. If it still doesn’t run, the pump itself or the wiring is faulty.

Symptoms of a Failing Fuel Pump (Not Just the Relay)

Sometimes the relay is fine, but the pump itself is going bad. Here’s what to watch for:

  • Engine sputtering at highway speeds
  • Difficulty starting – the engine cranks longer than usual before firing
  • Loss of power under load or when accelerating
  • No start condition – the engine cranks but never fires

To check fuel pressure: Connect a fuel pressure gauge to the Schrader valve on the fuel rail and check the reading. For most Silverado models, the fuel pressure should fall within 55–61 PSI for gasoline engines. Deviations from this range signal potential issues, such as a weak pump, clogged filter, or faulty regulator.

Important note about the fuel filter: In the 2009 Silverado, the fuel filter is an integral part of the fuel pump/fuel level sensor module. To replace the filter, you must replace the entire fuel pump module. If pressure is low and there are no restrictions or kinks in the lines, the pressure regulator (which is also part of the pump module) may be stuck open, preventing the system from reaching normal operating pressure. The regulator is not serviceable separately – you must replace the fuel pump module.

Fuses and the Fuel Pump Control Module

In addition to the relay, the fuel pump system on the 2009 Silverado is protected by fuses and uses a fuel pump control module (also called the fuel pump driver control module or fuel pump flow control module). If the relay checks out but the pump still doesn’t run, check these items:

  1. Ignition main relay – supplies power to the fuel pump control module
  2. Fuel pump control module fuse – receives power from the ignition main relay when the key is in the RUN position
  3. Fuel pump control module fuse – always hot

If the fuses and relay are okay, check the wiring back to the fuel pump. If the fuse, relay, and wiring are all good, the fuel pump itself is probably defective. If the pump runs continuously with the ignition key in the ON position, the Powertrain Control Module (PCM) is probably defective – have the PCM checked by a professional mechanic.

Does the 2009 Silverado Have a Fuel Pump Reset Button?

No. Unlike Ford vehicles, Chevrolet trucks do not have a manual inertia switch or reset button for the fuel pump. Chevy uses electronic controls integrated with the vehicle’s systems. If your Silverado experiences a no-start condition after an impact, focus on checking the fuel pump relay and fuses rather than looking for a reset button.

If the issue developed gradually or isn’t connected to an impact, you might be dealing with a failing fuel pump, clogged filter, or other common fuel system issues.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke
  • The engine overheats, stalls repeatedly, or misfires under load
  • You are missing required tools, torque specs, or safe lifting equipment
  • You are not confident in the next step or safety outcome

Why Choose KEMSO for Your Fuel Pump Replacement

If your testing confirms that the fuel pump itself needs replacement, you want a part you can trust. KEMSO Fuel Pumps deliver high-performance, OEM-replacement quality with a lifetime warranty. Whether you drive a Silverado or any other vehicle covered by their lineup, KEMSO builds pumps that meet or exceed factory specifications, so you can get back on the road with confidence.

KEMSO offers a wide range of fuel pumps for trucks, cars, motorcycles, ATVs, and watercraft – all engineered for durability and reliable fuel delivery. With a lifetime warranty backing every unit, you’re covered for the long haul. Visit https://www.kemsoracing.com/ to find the right fuel pump for your vehicle and take advantage of their best-selling, highly rated products.

Final thoughts: On a 2009 Chevy Silverado, the fuel pump relay is a small part that controls a big job – getting fuel to your engine. When something goes wrong, start with the simple checks: listen for the pump prime, inspect the relay, test it with a multimeter, and swap it out if needed. Most relay replacements take less than 15 minutes and save you a costly trip to the shop. If the relay isn’t the issue, move on to fuses, wiring, and the pump itself. And when you need a replacement fuel pump, KEMSO has you covered with high-performance, OEM-quality parts and a lifetime warranty – check them out at https://www.kemsoracing.com/ for more details.


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