Replacing Fuel Pump In Impala: Step-By-Step Guide For 06 Models

Replacing the fuel pump on a Chevy Impala can be a challenging task. While some people opt to do it themselves, others prefer taking their car to a mechanic. In some models, the fuel pump is located inside the fuel tank, which means that the tank has to be removed first. This can be a cumbersome process, and it is important to have the necessary tools and expertise to carry it out safely. Alternatively, some people choose to create an access hole inside the car to reach the fuel pump, but this can also be a complicated procedure.

Removing the gas tank

To replace the fuel pump on a 2006 Impala, you will first need to remove the gas tank. This is not a simple task and should only be attempted by experienced mechanics.

Start by ensuring that you have the necessary tools and safety equipment, including eye protection, gloves, and a fire extinguisher. You will also need to disconnect the negative battery terminal to avoid any risk of sparks.

Next, you will need to raise the vehicle and safely support it on jack stands. The gas tank is located at the rear of the vehicle, so you will need to crawl underneath to access it. There are various straps and bolts holding the tank in place, which you will need to remove carefully. It is important to note that the fuel pump is located at the top of the tank, so you will need to gain access to the top of the tank for the next steps.

Once the tank is lowered, you can begin to remove the fuel pump. This process can be complex, so it is important to refer to a repair manual or seek advice from a qualified mechanic if you are unsure.

Safety is paramount when working with fuel systems, so ensure all hot work is carried out away from the vehicle, and any sparks or flames are avoided. It is also essential to dispose of old fuel and oil responsibly, taking it to a designated disposal point rather than pouring it down the drain.

Accessing the fuel pump via the interior

To access the fuel pump on a Chevy Impala, you will need to remove the rear seats and locate the fuel pump access panel. This panel is usually covered by a piece of carpet or insulation. Once you have located the access panel, you will need to remove the screws or bolts holding it in place and carefully lift it up. Be careful not to drop any tools or parts into the fuel tank.

Before attempting any repairs or maintenance on the fuel pump, it is important to relieve any pressure in the fuel tank by loosening the gas cap. This will help prevent any accidental leaks or spills.

Once the access panel is removed, you should be able to see the top of the fuel tank and the fuel pump assembly. The fuel pump is usually held in place by a retaining ring or clamp, which can be removed using a wrench or socket. With the retaining ring removed, you can then lift the fuel pump out of the tank. Be careful not to damage any of the electrical connectors or fuel lines attached to the fuel pump.

It is recommended to have a helper when performing this task, as it can be difficult to manage all the tools and parts by yourself. Additionally, having a second person can help ensure that the fuel pump is properly installed and that there are no leaks when the repairs are complete.

When reinstalling the fuel pump, be sure to clean the top of the fuel tank and the area around the mounting ring to prevent any dirt or debris from falling into the tank. Tighten the retaining ring securely, but be careful not to over-tighten it, as this can damage the fuel pump or the tank. Once the fuel pump is securely in place, you can then lower the fuel tank back into place and reattach the access panel. Finally, be sure to tighten the gas cap securely before starting the vehicle.

Troubleshooting common issues

Problem: Blew fuse to the fuel pump

Solution: Replace with a 15-amp fuse. Inspect the wiring in its entirety and insulate the damaged sections. The high current may be due to a short in the wiring or a failing pump. If the pump is failing, it will need to be replaced, and the tank should be cleaned.

Problem: No heat at idle

Solution: The water pump may be faulty and need replacing. Other potential issues include a heater core that is plugged or a control valve that needs replacing.

Problem: No power to the fuel pump

Solution: Check for an open wire going to the fuel pump. It could also be that the computer thinks someone is trying to steal the car and disables the fuel pump. Try pouring 1/4 cup of fuel towards the manifold and start the car. If it continues to run, this was the issue.

Problem: Unable to put fuel in the tank

Solution: This may be due to someone having "topped off" the tank in the past, causing raw fuel to travel down the vapor return line and into the vapor canister. Try detaching the return line from the canister and letting the vapour escape.

Problem: Fuel pump not getting power

Solution: Check the connector in the trunk on the passenger side, which tends to get wet and corrode the prongs. Unscrew, take out, and unplug the connector.

Safety precautions when changing the fuel pump

Changing a fuel pump can be dangerous, especially since you are working with flammable liquid. Here are some safety precautions to follow when changing the fuel pump of a 2006 Chevrolet Impala:

Prepare the Workspace

Before starting, ensure your workspace is safe and accessible. Work in a well-ventilated area, preferably outdoors, to minimise the risk of fire and inhaling harmful fumes. Keep the workspace clean and tidy to avoid any accidents or mishaps.

Wear Protective Gear

Always wear safety gear when working with fuel pumps. This includes safety glasses to protect your eyes from fuel spills and splashes, gloves to protect your hands, and appropriate clothing to cover your body.

Disconnect the Battery

Before starting any work on the fuel pump, disconnect the battery. This is a crucial step to prevent any accidental activation of the fuel pump or ignition of fuel vapours.

Reduce Fuel in the Tank

Since the fuel pump is located inside the fuel tank, reducing the amount of fuel in the tank can help minimise the risk of spillage and make the tank lighter and easier to handle. Use a siphon or drain the fuel into a safe container.

Relieve the Fuel System Pressure

Before removing the fuel pump, relieve the fuel system pressure. You can do this by running the engine and pulling the fuel pump relay, or by pressing the Schrader valve on the pressure line to release the fuel spray.

Clean the Area

Before removing the old fuel pump and installing the new one, clean the area around the fuel pump to prevent dirt and debris from falling into the fuel tank.

Follow Instructions

Refer to your vehicle's service manual or online tutorials for specific instructions on replacing the fuel pump for your Impala model. Follow the instructions carefully to ensure a safe and proper installation.

Seek Professional Help

If you feel uncomfortable or unsure about any part of the process, it is best to consult a professional mechanic. They have the training and experience to handle fuel pump replacements safely and effectively.

Tools and parts required

To replace the fuel pump in a 3.8L Chevy Impala, you will need the following tools and parts:

Tools:

• Ratchet and socket
• Wrench
• Flat-head screwdriver
• Shop rag
• Drift punch and hammer
• Needle-nose pliers

Parts:

• New fuel pump
• New assembly O-ring seal

Additionally, if you do not have access to a drift punch and hammer, you can purchase Tool set number J 37088-A, which can be used to disconnect the hoses from the fuel sender/pump assembly.

Frequently asked questions