2009 Chevy Malibu Fuel Pump Relay Location: Where to Find It and How to Fix Common Fuel Problems
The fuel pump relay on a 2009 Chevy Malibu is located in the rear fuse block, inside the trunk on the driver's side, behind a small panel, and it is relay number 37. The fuel pump fuse is number 25 in the same block . If your Malibu cranks but won't start, or starts and then stalls, the fuel pump relay is one of the first things you should check before spending money on a new fuel pump. This guide will walk you through finding the relay, testing it, and understanding what else could be causing your fuel delivery problems.
Why the Fuel Pump Relay Matters
The fuel pump relay is the electrical switch that sends power to the fuel pump inside your gas tank. When you turn the key to the ON position, the engine control module (ECM) energizes this relay, which then supplies voltage to the fuel pump. The pump pressurizes the fuel system so the engine can start and keep running .
On the 2009 Malibu, the ECM enables the fuel pump relay when the ignition is turned ON, but it will shut the relay off within 2 seconds unless it detects ignition reference pulses from the engine cranking. Once the engine is running, the ECM keeps the relay energized as long as those pulses continue .
If the relay fails, the fuel pump won't receive power, and your engine won't get the fuel pressure it needs. That typically results in a cranks-no-start condition or a car that starts briefly and then stalls .
Step-by-Step: Finding the Relay
The rear fuse block in the 2009 Malibu is mounted in the trunk, on the driver's side rear quarter panel area. To access it:
1. Open the trunk and look on the left side, near the rear wheel well .
2. You may need to remove a small plastic trim panel to expose the fuse block. The panel usually pulls off with a firm tug or after removing a couple of plastic retainers.
3. Once the fuse block is visible, look for relay position number 37. That is the fuel pump relay .
4. The fuel pump fuse is position number 25, located in the same block .
Some owners have also reported that the circuit board in the trunk area can develop heat damage, which sometimes causes a short and stalls the car. If you notice a burnt smell or discoloration on the fuse block, that could be your problem .
How to Test Whether the Relay Is Bad
You don't need expensive tools to test the relay. Here is a practical approach:
1. Listen for the pump prime. Turn the key to the ON position without cranking the engine. You should hear a brief humming sound from the rear of the car for about 2 seconds as the pump pressurizes the system. If you hear nothing, move on to testing the relay and fuse .
2. Swap the relay. Find another relay in the same fuse block that has the same part number and configuration. Many of the relays in that block are identical. Swap them and try starting the car again. If it starts, the relay was bad .
3. Test the relay with a multimeter. If you have a digital multimeter, you can check the relay's coil resistance. Disconnect the relay and measure resistance between terminals 85 and 86. It should read between 70 and 110 ohms. If it reads outside that range, the relay is faulty .
4. Check for blown fuse. Pull fuse number 25 and inspect it visually. If the metal strip inside is broken or discolored, replace it. A blown fuse can cause the same symptoms as a bad relay .
What Else Could Cause Stalling or No-Start
If the relay and fuse check out fine, there are several other common culprits on the 2009 Malibu that produce very similar symptoms:
Clogged Fuel Filter. The fuel filter on your Malibu is located inside the fuel pump assembly in the tank . A clogged filter restricts fuel flow and can cause the engine to stall or run poorly. Some sources recommend replacing the fuel filter every 30,000 miles to prevent undue strain on the fuel pump .
Failing Fuel Pump. If the pump itself is weak or dying, you'll typically experience symptoms like hard starting, stalling at low speeds, or a car that acts like it's running out of gas even with a full tank . The fuel pressure specification for your car is 50-60 psi with key ON, engine OFF. If pressure reads below that, the pump is likely weak .
Corroded Wiring or Bad Grounds. Even a good pump won't work if it doesn't receive proper voltage and ground. Check the wiring harness and connectors near the tank and under the body for corrosion, damage, or loose terminals .
Fuel Pump Relay Control Circuit. The ECM controls the relay ground circuit. If the relay checks out but the ECM isn't commanding it properly, you might have a wiring issue in the control circuit. A scan tool can help verify whether the ECM is commanding the relay ON and OFF correctly .
Intermittent Electrical Issues. Several 2009 Malibu owners reported that their cars would stall and then restart after waiting a few minutes, with dealerships unable to find any stored codes. This points to intermittent electrical problems, often related to the relay or the wiring in the trunk area .
Diagnosing Fuel Pressure Properly
If you want to confirm whether the fuel pump is delivering enough pressure, you need a fuel pressure gauge. Here's what to do:
1. Install a fuel pressure gauge on the test port on the fuel rail .
2. Turn the ignition ON and command the fuel pump relay ON with a scan tool, or simply turn the key and listen for the pump to run.
3. Verify the fuel pressure reads between 345-414 kPa (50-60 psi) .
4. After turning the pump off, pressure should not drop more than 34 kPa (5 psi) in one minute. If it drops faster, the check valve inside the pump module may be leaking .
If the pressure is low, check for a restricted fuel feed pipe, poor harness connections, or a failing pump module before replacing parts .
What About a Fuel Pump Reset Switch?
Many owners wonder if the Malibu has a fuel pump reset switch. It does not. Unlike some other vehicle models, the 2009 Chevy Malibu does not incorporate a fuel pump reset button or inertia switch . If your car stalls after an accident or impact, the fuel pump will typically shut off automatically as part of the safety system, but there is no manual reset button .
If the pump stops working and you've verified the relay, fuse, and wiring are all good, the pump itself is likely the problem and will need replacement .
Replacing the Fuel Pump
If you've ruled out the relay, fuse, wiring, and filter, and the fuel pressure is still low, the fuel pump module itself is likely failing. On the 2009 Malibu, the fuel pump is part of an in-tank module that includes the pump, strainer, fuel level sender, and pressure regulator .
Access to the pump on this generation can typically be done from under the rear seat cushion through a service access panel, without dropping the fuel tank . The process generally involves:
1. Disconnecting the negative battery cable and relieving fuel system pressure.
2. Removing the rear seat bottom cushion to access the cover plate.
3. Disconnecting the electrical connector and fuel lines.
4. Removing the lock ring and lifting the pump module out .
This is a moderately involved job, and if you're not comfortable working with fuel system components, it's best to have a professional handle it .
Why You Should Consider a KEMSO Fuel Pump
When it comes time to replace the fuel pump in your 2009 Chevy Malibu, choosing a reliable brand makes a big difference. KEMSO offers high-performance fuel pumps that are designed as OEM replacements, meaning they meet or exceed the original factory specifications for fit, form, and function. These pumps deliver consistent fuel pressure, which is critical for smooth starting and reliable performance.
KEMSO fuel pumps come with a lifetime warranty, which is a rare and valuable benefit in the automotive parts industry. If the pump ever fails due to a manufacturing defect, you get a replacement at no cost. That kind of backing gives you peace of mind that the part you're installing is built to last.
Best of all, KEMSO fuel pumps are priced at just $79.98, which is often less than half the cost of dealer parts. With free shipping and easy returns, it's a practical choice for DIY mechanics and professional shops alike.
To see the full selection of KEMSO fuel pumps for your vehicle, check out their website at https://www.kemsoracing.com/. They have a complete catalog with detailed fitment information, customer reviews, and technical support, so you can order directly with confidence.
Final Thoughts
If your 2009 Chevy Malibu is stalling, struggling to start, or dying while driving, start with the simplest fixes before replacing major components. Check the fuel pump relay in the trunk fuse block first—it's quick, free, and often the culprit. If that's fine, move on to the fuse, wiring, and fuel pressure testing. And if the pump does need to be replaced, a quality aftermarket option like KEMSO will keep your Malibu running reliably without breaking the bank.
Visit https://www.kemsoracing.com/ to browse their fuel pump selection and get your car back on the road.