2006 Chevy Malibu Fuel Pump Relay Location: Find It Fast and Fix It Right

The fuel pump relay on a 2006 Chevy Malibu is located in the rear fuse block, which sits behind a panel on the driver's side of the trunk. It is relay number 37, and the fuel pump fuse (number 25) sits right next to it in the same block. This is the first place to check if your Malibu cranks but will not start, stalls unexpectedly, or shows signs of fuel pressure loss. The rear fuse block is easy to reach without any special tools, and in most cases you can test or swap the relay in under ten minutes.

If your car is suffering from hard starting, intermittent stalling, or a complete no-start condition, the fuel pump relay is a smart suspect. It is a small electrical switch that controls power to the fuel pump, and when it fails, the pump simply does not run. Before you spend money on a new fuel pump or pay a shop for hours of labor, checking the relay and its fuse should be your first diagnostic step. This guide walks you through the exact location, how to test the relay, and what to do if the relay is not the problem.

Where Exactly Is the Fuel Pump Relay on a 2006 Malibu?

The 2006 Chevrolet Malibu has two fuse boxes. The first is the underhood fuse block, located on the left side of the engine compartment. It handles high-current items like the cooling fans, starter, and engine control module. The second is the rear fuse block, and that is where the fuel pump relay lives.

To reach the rear fuse block, follow these steps:

  1. Open the trunk.
  2. Look at the driver's side rear quarter panel (the left side when you are standing behind the car facing forward).
  3. You will see a small access panel or trim cover. On the sedan, this panel is on the left rear quarter panel. On the extended sedan (Maxx), it is on the left rear of the passenger compartment behind a similar cover .
  4. Pull the panel off. It is usually held by a couple of clips or a simple twist fastener. No tools are needed.
  5. Inside you will see a fuse block with rows of mini fuses and several square relays.

In that rear fuse block, the fuel pump relay is relay number 37 . It is a standard square automotive relay. Directly associated with it is the fuel pump fuse, number 25, which is a 15-amp mini fuse . The relay and fuse are positioned close to each other, which makes checking both quick and convenient.

Some online sources for the 2007 model year also confirm the same placement in the rear fuse block behind the driver's side trunk panel, with the relay at position 37 and the fuse at position 25 . The layout carries over to the 2006 model, so you can rely on this location for your car.

How to Test the Fuel Pump Relay

Once you have located the relay, you need to verify whether it is actually working. There are two practical methods: listening for the click, and testing with a multimeter.

Method 1: The Listening Test

This is the quickest way to get a rough idea of whether the relay is engaging.

  1. Turn the ignition key to the ON position but do not crank the engine.
  2. Listen carefully from the rear seat area. You should hear a brief hum for two to three seconds as the fuel pump pressurizes the system .
  3. If you hear nothing, the relay may not be clicking. You can also place your hand on the relay while a helper turns the key to the ON position. You should feel a faint click if the relay is energizing.

If you hear the relay click but the pump does not hum, the relay may be passing power but the pump itself is dead. If you hear no click at all, the relay coil may be open, or the control signal from the powertrain control module (PCM) is missing.

Method 2: Multimeter Testing

For a definitive answer, you can bench-test the relay. Remove the relay from the fuse block and follow this procedure from the GM service manual:

  1. Connect a 20-amp fused jumper wire from the positive battery terminal to relay terminal 85.
  2. Connect a jumper wire from the negative battery terminal to relay terminal 86.
  3. Measure the resistance between terminals 30 and 87. You should read less than 2 ohms .
  4. If the resistance is higher than 2 ohms, or if the relay does not click when you apply power, replace the relay .

This test directly verifies the relay's internal contacts. A relay can look fine on the outside but have burnt or pitted contacts inside, which causes high resistance and prevents the fuel pump from receiving full power.

What Causes the Fuel Pump Relay to Fail?

Relays are mechanical parts inside, so they do wear out. Understanding the failure modes helps you prevent a repeat failure.

  • Current overload: If the fuel pump or the electrical system draws more current than the relay is designed to handle, the relay contacts can overheat and burn out .
  • Short circuit: A short in the wiring can send a surge through the relay, damaging the coil or welding the contacts .
  • Normal wear: The electromagnetic coil and mechanical contacts degrade over time due to repeated use, vibration, and age .

If you find a burnt or failed relay, it is worth checking the fuel pump's current draw. A pump that is starting to seize will pull more current and put extra stress on the relay. Replacing the relay without addressing the underlying pump issue may lead to a second failure shortly after.

What Else Could Be Wrong If the Relay Is Fine?

If the relay tests good and the fuse is intact, you need to look further. Several other components can cause the same symptoms:

  1. Blown fuel pump fuse: The 15-amp fuse protecting the fuel pump may be blown. This usually happens due to a damaged wire shorting against the vehicle body . If the fuse blows again after replacement, you likely have a wiring issue.

  2. Impact sensor activation: Some vehicles have an inertia switch that cuts power to the fuel pump after a collision. If this switch is tripped, the pump will not run even with a good relay .

  3. Faulty PCM or wiring: The powertrain control module controls the fuel pump relay. A failure in the PCM or in the wiring between the PCM and the relay can prevent the relay from energizing . Check for 12 volts at the relay coil terminals when the key is turned to the ON position.

  4. Clogged fuel filter: A badly restricted filter reduces fuel flow and makes the pump work harder, which can lead to premature failure . On the 2006 Malibu, the fuel filter is integrated into the pump module inside the tank, so it is not a serviceable external part .

  5. Defective fuel pump: The pump itself may be worn out. If the relay clicks, the fuse is good, and you have voltage at the pump connector, but the pump does not run, the pump motor is dead .

How to Diagnose a Failing Fuel Pump Beyond the Relay

If the relay and fuse check out, it is time to confirm whether the pump is the culprit. Here is a simple step-by-step approach:

Step 1: Listen for the prime. Turn the key to the ON position and listen from the rear seat area. You should hear a two- to three-second hum as the pump builds pressure. No sound means the pump is not receiving power or is dead .

Step 2: Check fuel pressure. The most definitive test is a fuel pressure gauge connected to the test port on the fuel rail. On the Malibu, fuel pressure should be between 50 and 60 psi with the engine running. If the pressure is below 50 psi, especially under load, the pump is likely weak .

Step 3: Test voltage at the pump. If you can access the fuel pump connector, have a helper turn the key to the ON position. You should see 12 volts at the connector for about two seconds. Voltage present but no pump operation means the pump is dead. No voltage means the problem is in the wiring, relay, or PCM circuit .

Step 4: Inspect the pump inside the tank. On the 2006 Malibu, the fuel pump is mounted inside the fuel tank. Some models in the 2004-2012 generation have a service access panel under the rear seat, which allows you to reach the pump without dropping the tank. Others require lowering the fuel tank .

Replacing the Fuel Pump on a 2006 Malibu: What to Expect

If you determine the pump itself is bad, replacement is the only fix. The process varies depending on your body style.

Interior access panel method (easier): Many Malibus have an access cover under the rear seat cushion. You remove the seat bottom, peel back the carpet, and unbolt a small cover. From there you can disconnect the electrical connector and fuel lines, remove the lock ring, and lift the pump module out. This method typically takes 1.5 to 3 hours for a DIY owner .

Dropping the fuel tank method (harder): If your car does not have an access panel, the tank must be lowered. You need to raise the rear of the car, siphon as much fuel as possible, disconnect the filler hose and electrical connectors, support the tank with a floor jack, and remove the strap bolts. This is more time-consuming and more dangerous due to the weight of the fuel tank .

A replacement fuel pump module for a 2004-2006 Malibu (2.2L, 3.5L, or 3.9L, excluding Maxx) typically costs between $48 and $93 for the part alone . Labor costs vary by shop, but a professional replacement is often priced between $180 and $228 for labor, with parts ranging from $641 to $764 if you use dealer components . DIY replacement is significantly cheaper, especially if you use the interior access panel.

The Bottom Line for 2006 Chevy Malibu Owners

The fuel pump relay on your 2006 Chevy Malibu is in the rear fuse block behind the driver's side trunk panel, at position number 37 . The fuel pump fuse is number 25, rated at 15 amps . Start your diagnosis there. Test the relay with the listening method or a multimeter, check the fuse, and only then move on to testing fuel pressure and the pump itself.

If you find yourself needing a new fuel pump, you want a part that is reliable and built to last. KEMSO offers high-performance fuel pumps that are OEM replacements, designed to match the fit and function of the original part. Each KEMSO fuel pump comes with a lifetime warranty, which means once you install it, you do not have to worry about premature failure. KEMSO pumps are a smart choice for the 2006 Chevy Malibu, whether you are replacing a worn-out unit or upgrading for better reliability. You can browse their full lineup of fuel pumps and other products at https://www.kemsoracing.com/ . Check their site for fitment details and to find the right pump for your Malibu.


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