Replacing Fuel Pump In 2001 Chevy Blazer: Step-By-Step Guide

If your 2001 Chevy Blazer is experiencing issues such as stalling, struggling to maintain speed, or making unusual noises, you may need to replace the fuel pump. While it is generally recommended to have this job done by a professional mechanic or dealership service department, it is possible to replace the fuel pump yourself. This will involve accessing the fuel pump, which is located inside the fuel tank, either through an access panel in the passenger compartment or by removing the tank from the vehicle. Some people have even resorted to cutting a hole in the floor or trunk of the car above the fuel pump to access it, but this is generally not recommended unless you are stranded and do not have access to a tow truck or proper tools.

Signs of a failing fuel pump

A failing fuel pump can wreak havoc on your car's performance and even leave you stranded on the road. Here are some signs that indicate a failing fuel pump in your 2001 Chevy Blazer:

• Engine "chokes" or struggles to maintain speed: A faulty fuel pump may not be able to keep up with the engine's fuel demands, causing the engine to choke or struggle to maintain speed.
• Noises, backfires, and a sputtering engine: A failing fuel pump can cause an inconsistent fuel flow to the engine, resulting in a sputtering engine and backfires.
• Hesitation at start or take-off: If your car hesitates to start or take off, it could be due to a lack of fuel delivery by the pump.
• Overheating: A bad fuel pump can cause the engine to overheat as it may not be able to deliver enough fuel to meet the engine's demands.
• Check Engine Light: If the "Check Engine" light comes on, it could be due to a faulty fuel pump causing a slow starvation of fuel to the engine.
• Whining noise from the fuel tank: A damaged fuel pump may make a loud, whining noise, indicating a problem. This noise may get louder as the pump works harder to deliver fuel.
• Trouble starting the car: A failing fuel pump may not be able to deliver enough fuel to the engine, causing difficulty in starting the car.
• Engine misfires: Misfires can occur when the fuel pump cannot supply enough fuel to the engine, causing cylinders to fire too late or not at all.
• Stalling: A bad fuel pump can cause the vehicle to stall, especially at high temperatures, due to insufficient fuel supply to the engine.
• Power surges: If the pump delivers too much fuel to the engine, it can cause power surges, resulting in speed spikes and drops.
• Lower fuel efficiency: A faulty fuel pump may consume more power, leading to decreased fuel efficiency and more frequent trips to the gas station.

How to access the fuel pump

To access the fuel pump of a 2001 Chevrolet Blazer, follow these steps:

• Jack up the vehicle and block it securely.
• Place a jack under the fuel tank. A transmission jack works best for this purpose.
• Remove the straps holding the fuel tank in place.
• Lower the tank slowly and carefully. Ensure you have enough room to reach over and disconnect the fuel and electrical lines.
• Disconnect the fuel and electrical lines.
• Further lower the tank and clean the top of the tank.
• Remove the ring holding the sending unit in place.
• Install a new unit with a new seal and reinstall the fuel tank.

Alternatively, a mechanic will need to get to the failed pump through the top of the fuel tank via an access panel in the passenger compartment or by removing the tank from the vehicle.

Fuel pump replacement parts

When replacing the fuel pump in a 2001 Chevy Blazer, there are several replacement parts available from different brands.

Delphi Automotive Fuel Pump Module Assembly

This assembly is designed for the 4-door model. It has a pressure rating of 62-109 psi, a voltage of 12 volts, and an electric fuel pump. It includes a gasket or seal, a fuel sending unit, and a strainer.

ACDelco Fuel Pump Assembly

This assembly is designed for the 4-door model with a robust fuel system sender (K53). It has a voltage of 12 volts, an electric fuel pump, and includes a strainer.

TruGrade Fuel Pump

This fuel pump is designed for the 2-door model with the module code SGK. It includes a wiring harness and an internal strainer.

MasterPro Fuel Pump Module Assembly

This assembly is designed for the 4-door model and features a turbine pump. It has a voltage of 12 volts, an electric fuel pump, and includes a gasket or seal and a strainer.

These are just a few examples of the replacement parts available for the fuel pump in a 2001 Chevy Blazer. It's important to select parts that are compatible with your specific vehicle model and always follow the instructions provided by the manufacturer for proper installation.

Fuel pump repair cost

The fuel pump in a car is responsible for delivering fuel from the tank to the fuel injectors. It is generally mounted inside the fuel tank and has a small electric motor to ensure that pressurised gasoline flows to the engine. Fuel pumps are designed to be long-lasting, but they can occasionally fail.

The average national cost for a fuel pump replacement across all vehicles is roughly between $611 and $894, including parts and labour, depending on the age of the vehicle. For a Chevrolet Blazer, the average cost is between $743 and $841, with labour costs estimated between $170 and $214, and parts priced between $573 and $626.

It is important to note that these estimates are averages and that the actual cost of replacement may vary depending on your location and the specific details of your vehicle. It is always best to consult with a local mechanic or dealership for the most accurate estimate.

Additionally, it is recommended that fuel filters be replaced at the same time as the fuel pump to ensure optimal performance and prevent future issues.

Troubleshooting fuel pump issues

If your 2001 Chevrolet Blazer is experiencing fuel pump issues, there are several troubleshooting steps you can take to identify and resolve the problem.

Firstly, it's important to recognise the warning signs of a faulty fuel pump. These can include:

• Engine "chokes" or struggles to maintain speed
• Unusual noises, backfires and a sputtering engine
• Hesitation at start or take-off
• Overheating of the engine
• The "Check Engine" light is on

If you notice any of these issues, it's recommended to consult a mechanic as soon as possible to prevent further complications.

In some cases, fuel pump issues can be caused by problems with the fuel delivery system, such as a faulty fuel pressure regulator or issues with the electrical system. It's advisable to have a full diagnostic scan performed to accurately identify the root cause.

When replacing the fuel pump, always use new parts from the dealer, avoiding aftermarket or used options. Additionally, ensure that the fuel pump relay, resistance/continuity in the wire harness, and the PCM/computer are checked.

If your Blazer is not taking fuel into the tank, it may be due to air in the tank. Check the fill neck, vent tube, and the vent pressure control valve (PCV). Disconnecting the vent tube from the PCV may help resolve the issue.

For rough starts, especially in the morning, consider performing a leak-down test to check for fuel pressure issues. A weak battery could also be a factor, so a load test on the battery is recommended.

Frequently asked questions