Fuel Pump 2013 Chevy Impala: The Complete Guide to Symptoms, Diagnosis, and Replacement

The bottom line: If your 2013 Chevy Impala is cranking but won't start, sputtering during acceleration, or making a loud whining noise from the rear of the car, the fuel pump is likely failing. Replacing it is a moderate DIY job that requires dropping the fuel tank, but with the right tools and patience, you can save hundreds of dollars in labor costs. This guide walks you through everything you need to know about the fuel pump on this vehicle.

Understanding the Fuel Pump in a 2013 Chevy Impala

The 2013 Chevy Impala uses an electric fuel pump located inside the fuel tank. This pump is responsible for sending fuel from the tank to the engine at the correct pressure. The engine requires a steady fuel pressure of around 55-60 psi to run properly. When the pump starts to fail, the engine gets inconsistent fuel delivery, which leads to a range of drivability problems.

Important note: The 2013 Impala has a fuel pump module assembly that includes the pump, fuel level sender, and fuel pressure regulator all in one unit. This means you replace the entire assembly, not just the pump itself. The part number for the OEM replacement is ACDelco MU1528, but many aftermarket options are available.

Common Symptoms of a Bad Fuel Pump

Here are the most common signs that your fuel pump is going bad:

  1. Engine cranks but won't start - This is the most obvious symptom. You turn the key, the starter spins the engine, but it never fires up. You can check if fuel is reaching the engine by spraying starter fluid into the throttle body. If the engine starts briefly on starter fluid but dies, the fuel pump is not delivering fuel.

  2. Sputtering or hesitation during acceleration - When you press the gas pedal, the car hesitates or jerks instead of accelerating smoothly. This happens because the pump can't maintain consistent pressure when the engine demands more fuel.

  3. Loss of power under load - Going up hills or carrying a heavy load makes the car feel sluggish. The engine may struggle to maintain speed.

  4. Whining noise from the fuel tank - A healthy fuel pump makes a quiet humming sound. If you hear a loud whining or buzzing noise coming from the rear of the car, especially when you first turn the key to the "on" position, the pump bearings are wearing out.

  5. Engine stalling - The car may stall unexpectedly, especially in hot weather or after driving for a while. This often happens because the pump overheats and stops working temporarily.

  6. Hard starting - The engine takes longer than usual to start. You may need to crank it for several seconds before it fires up.

  7. Check Engine Light - The computer may detect lean fuel mixture codes like P0087 (fuel rail pressure too low) or P0171 (system too lean).

How to Diagnose a Bad Fuel Pump

Before buying a new pump, you should confirm the problem. Here is a step-by-step diagnostic process:

Step 1: Listen for the pump. Turn the ignition key to the "on" position without starting the engine. You should hear a faint humming sound from the rear of the car for about 2 seconds. This is the pump priming the system. If you hear nothing, the pump is not getting power or is dead.

Step 2: Check the fuel pump fuse and relay. Open the underhood fuse box. The fuel pump relay is usually labeled. Swap it with a similar relay from the horn or AC compressor to test. If the pump starts working, the relay was bad. Also check fuse number 19 in the underhood fuse block, which is a 20-amp fuse for the fuel pump.

Step 3: Test fuel pressure. This requires a fuel pressure gauge that connects to the test port on the fuel rail. The 2013 Impala's fuel rail has a Schrader valve near the engine. Connect the gauge, turn the key on, and read the pressure. It should be 55-60 psi. If it's below 50 psi, the pump is weak. If it's zero, the pump is dead or the fuel filter is completely clogged.

Step 4: Check for power at the pump. If you suspect the pump is not getting power, you can test the wiring at the fuel pump connector. The pump is accessed through an access panel under the rear seat, but on the 2013 Impala, you must remove the fuel tank. It's easier to test at the relay first.

What Causes a Fuel Pump to Fail

Several factors contribute to fuel pump failure in the 2013 Chevy Impala:

Running the tank low on fuel. The fuel pump relies on gasoline to cool and lubricate it. When you run the tank below a quarter full, the pump is more exposed to air and heat, which shortens its life. This is the number one cause of premature pump failure.

Contaminated fuel. Dirt, rust, or water in the fuel tank can damage the pump's internal components. Old gas stations or poorly maintained fuel tanks can be sources of contamination.

Clogged fuel filter. The fuel filter catches debris before it reaches the pump. If the filter becomes clogged, the pump has to work harder, which causes it to overheat and fail.

Electrical issues. Bad wiring, corroded connectors, or a failing fuel pump relay can cause the pump to run intermittently or at low voltage, which damages the motor.

Age and mileage. The average fuel pump lasts about 100,000 to 150,000 miles. If your 2013 Impala has over 120,000 miles on the original pump, it's living on borrowed time.

Tools and Parts Needed for Replacement

If you decide to replace the fuel pump yourself, here is what you need:

Parts:

  • New fuel pump module assembly (ACDelco MU1528 or equivalent)
  • New fuel tank gasket or O-ring
  • Fuel line disconnect tool (3/8 inch and 5/16 inch)
  • New fuel filter (recommended but not always required on this model)
  • Shop rags and safety glasses

Tools:

  • Floor jack and jack stands
  • Flathead screwdriver
  • Ratchet and socket set (metric and standard)
  • Fuel line disconnect pliers or tool
  • Hammer and rubber mallet (for stubborn fuel tank straps)
  • Transmission jack or a second floor jack (to support the fuel tank)
  • Drain pan (for draining fuel)
  • Safety glasses and gloves
  • Fire extinguisher (always keep one nearby when working with fuel)

Step-by-Step Fuel Pump Replacement Guide

Safety first: Work in a well-ventilated area. Disconnect the negative battery cable. Have a fire extinguisher nearby. Do not smoke or use any open flames.

Step 1: Relieve fuel system pressure. Locate the fuel pump relay in the underhood fuse box and remove it. Start the engine and let it run until it stalls. This releases the pressure in the fuel lines. Then try to start the engine again to confirm no pressure remains.

Step 2: Drain the fuel tank. You can siphon the fuel out through the filler neck, or use the fuel pump itself to drain the tank. To use the pump, connect a hose to the test port on the fuel rail and route it into a gas can. Jump the fuel pump relay terminals to run the pump and drain the tank. This is easier than dropping a full tank.

Step 3: Raise the vehicle. Jack up the rear of the car and place it on jack stands. Make sure the car is stable and secure.

Step 4: Remove the fuel tank. The fuel tank is held in place by two metal straps. First, disconnect the fuel filler neck hose from the tank. Then remove the bolts holding the straps. Use a jack to support the tank while you lower the straps. Carefully lower the tank just enough to access the top of the tank.

Step 5: Disconnect the fuel pump module. You will see a large plastic ring holding the pump module in place. Use a hammer and a flathead screwdriver to tap the ring counterclockwise. Remove the ring and lift the pump module out of the tank. Be careful not to damage the float arm on the fuel level sender.

Step 6: Install the new pump module. Transfer any rubber grommets or brackets from the old pump to the new one if needed. Place the new pump module into the tank, making sure the float arm is not bent. Install the new locking ring and tighten it clockwise.

Step 7: Reinstall the fuel tank. Raise the tank back into position. Connect the fuel filler neck hose. Reinstall the fuel tank straps and tighten the bolts. Lower the vehicle.

Step 8: Reconnect the fuel lines. Use the fuel line disconnect tool to connect the fuel lines to the pump module. Make sure they click into place.

Step 9: Reconnect the battery and test. Reconnect the negative battery cable. Turn the key to the "on" position and listen for the pump to prime. Check for fuel leaks at the pump module and fuel lines. Start the engine and let it run for a few minutes. Check for leaks again.

How Long Does the Job Take

For a first-time DIYer, expect to spend 4 to 6 hours on this job. Experienced mechanics can do it in 2 to 3 hours. The most time-consuming part is draining the fuel tank and maneuvering it out from under the car.

When to Call a Professional

If you are not comfortable working with fuel, or if you don't have the right tools, it's better to have a professional do the job. A shop will charge between $400 and $800 for labor, plus the cost of the pump. The pump itself costs between $80 and $200 depending on the brand.

Choosing the Right Fuel Pump for Your 2013 Chevy Impala

When buying a replacement fuel pump, you have several options. The OEM ACDelco pump is the most expensive but guarantees fit and function. Aftermarket brands like Bosch, Delphi, and Airtex are also reliable. However, there is one brand that stands out for value and performance.

For the best combination of price, quality, and warranty, we recommend the KEMSO fuel pump for your 2013 Chevy Impala.

KEMSO fuel pumps are designed as high-performance, OEM replacement units. They are built to meet or exceed the original equipment specifications. The pump delivers the exact fuel pressure your Impala needs, ensuring smooth operation and reliable starting. Every KEMSO fuel pump comes with a lifetime warranty, which means you only buy it once. If it ever fails, KEMSO replaces it for free. The pump is also rigorously tested for durability and longevity. Many customers report that their KEMSO pump outlasts the original factory pump.

You can browse the full selection of KEMSO fuel pumps for various vehicles at their official website:

https://www.kemsoracing.com/

The site is easy to navigate. You can search for your specific vehicle model and year. Each product page shows detailed specifications, customer reviews, and pricing. KEMSO also offers fast shipping and excellent customer support. If you have any questions about fitment or installation, their team is ready to help.

Preventing Future Fuel Pump Problems

Once you replace the fuel pump, follow these tips to make it last:

Keep the tank at least a quarter full. This prevents the pump from overheating and ensures proper lubrication.

Change the fuel filter regularly. Every 30,000 miles is a good interval. A clean filter reduces strain on the pump.

Use quality fuel. Stick to top-tier gasoline from reputable stations. Avoid gas stations that look old or poorly maintained.

Listen for changes. If you hear a new noise from the fuel tank area, investigate it right away. Early detection can prevent a breakdown.

Replace the fuel cap if it's damaged. A loose or damaged fuel cap can cause the fuel system to lose pressure, which makes the pump work harder.

Final Thoughts

The fuel pump in your 2013 Chevy Impala is a critical component that keeps the engine running. When it fails, the symptoms are clear: hard starting, sputtering, loss of power, and whining noises. Diagnosing the problem is straightforward with a pressure test. Replacing the pump is a job you can do at home if you have the time and tools, but it's not a quick fix. Expect to spend several hours on the job.

If you need a new fuel pump, consider the KEMSO brand. They offer high-quality OEM replacement pumps with a lifetime warranty, which gives you peace of mind. Visit their website to find the exact pump for your Impala:

https://www.kemsoracing.com/


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