2001 Buick Century Fuel Pump Location: The Complete Guide to Finding and Replacing It

If you own a 2001 Buick Century and need to find the fuel pump, here is the short answer: The fuel pump is located inside the fuel tank, which is mounted under the rear of the vehicle, near the rear axle on the driver's side. On the 2001 Buick Century, there is no external access panel under the rear seat or in the trunk. To reach the fuel pump, you will need to either drop the fuel tank from underneath the car or cut an access hole in the floor pan. This guide walks you through the exact location, how to diagnose a failing pump, the replacement process, and the estimated costs involved.

Where Exactly Is the Fuel Pump on a 2001 Buick Century?

The fuel pump on the 2001 Buick Century is an electric pump mounted inside the fuel tank. The tank itself is located at the rear of the vehicle, positioned between the rear suspension components . On most front-wheel-drive GM cars from this era, including the Century, the fuel tank sits below the rear seat area, but there is no factory access door under the carpet. The pump is part of a fuel pump module assembly that also includes the fuel level sending unit and the fuel pressure regulator .

To get to the pump, you have two options:

  • Drop the fuel tank: This is the standard method recommended by most repair manuals. You disconnect the exhaust, driveshaft (if applicable), and fuel lines, then lower the tank down.
  • Cut an access hole: Some DIYers choose to cut a hole in the floor pan beneath the rear seat to access the pump without removing the tank. This is not factory-approved but is a common shortcut.

How to Diagnose a Bad Fuel Pump on Your 2001 Buick Century

Before you start tearing things apart, make sure the fuel pump is actually the problem. The symptoms of a failing fuel pump on a 2001 Buick Century are similar to other GM vehicles of the same generation .

Common signs of a bad fuel pump include:

  1. Engine cranks but won't start: This is the most obvious symptom. The starter turns the engine over, but it never fires up because no fuel is reaching the injectors .
  2. Sputtering or hesitation at high speeds: The engine may run fine at idle but struggle or choke when you try to accelerate or maintain highway speeds .
  3. Loss of power under load: The car feels sluggish going up hills or when merging onto the freeway.
  4. Whining noise from the rear of the car: A healthy fuel pump makes a quiet humming sound. If you hear a loud, high-pitched whine coming from the gas tank area, the pump is failing .
  5. Engine stalling unexpectedly: The car may stall while driving, then restart after sitting for a few minutes. This is a classic sign of a fuel pump overheating.
  6. Check Engine Light is on: Fault codes related to fuel pressure or fuel trim can indicate a pump issue.

Before you replace the pump, check the easy stuff first. A clogged fuel filter or a bad fuel pump relay can cause identical symptoms . The fuel pump relay on a 2001 Buick Century is located in the underhood fuse block, not inside the car. Have a mechanic perform a fuel pressure test to confirm the pump is actually the issue before you invest in a new one .

How to Replace the Fuel Pump on a 2001 Buick Century

Replacing the fuel pump on a 2001 Buick Century is a job that many experienced DIYers can handle, but it requires some mechanical know-how and the right tools. Expect to spend anywhere from two to four hours on the job, depending on how rusty the fuel tank straps and fuel lines are.

Step-by-step overview:

  1. Relieve fuel system pressure. Locate the fuel pump fuse in the underhood fuse box and remove it. Start the engine and let it idle until it stalls. This relieves the pressure in the fuel lines. Then disconnect the negative battery terminal to prevent any sparks or accidental starting .
  2. Drain the fuel tank. You will need to remove the fuel tank, so it needs to be as empty as possible. You can siphon the fuel out or use the fuel pump itself to pump it out into a gas can.
  3. Raise the vehicle and support it securely on jack stands.
  4. Disconnect the exhaust and driveshaft. The exhaust pipe and the rear driveshaft (if your car is a V6 model) may need to be lowered or removed to allow the fuel tank to drop.
  5. Disconnect the fuel lines and electrical connector. The fuel lines are located on top of the tank. They are held on by quick-connect fittings. Use a special tool to release them. Also, unplug the electrical harness that powers the pump.
  6. Remove the fuel tank straps. The tank is held up by two metal straps. Loosen the bolts and lower the tank carefully.
  7. Remove the fuel pump module. The pump is mounted on top of the tank inside a large plastic module. Turn the lock ring counterclockwise (usually using a hammer and a blunt punch) and lift the module out of the tank.
  8. Install the new pump. Carefully transfer the new pump into the module. Make sure the fuel filter sock is attached and the rubber grommets are seated properly. Replace the tank seal or O-ring.
  9. Reinstall everything in reverse order. Tighten the lock ring, raise the tank, reconnect the fuel lines and electrical connector, reinstall the exhaust and driveshaft, and lower the vehicle.
  10. Prime the system. Reconnect the battery. Turn the key to the "ON" position (without starting the engine) for a few seconds, then turn it off. Repeat this two or three times to pressurize the system. Then crank the engine. It may take a few seconds to start as the fuel lines fill up.
  11. Check for leaks. Once the engine is running, inspect all the fuel line connections for any signs of fuel leakage.

How Much Does a 2001 Buick Century Fuel Pump Replacement Cost?

The cost to replace a fuel pump on a 2001 Buick Century varies depending on whether you do it yourself or hire a mechanic.

DIY cost: A new fuel pump module costs between $80 and $150 for an aftermarket part. An OEM replacement from a dealership can cost $200 to $400 or more. You will also need a new fuel tank seal or O-ring, which costs about $10 to $20. Total DIY cost: roughly $100 to $200 for a quality aftermarket pump.

Professional repair cost: According to industry estimates, the average cost for a fuel pump replacement on a 2001 Buick Century ranges from $1,256 to $1,362 at a repair shop . This includes the cost of the pump (marked up by the shop) and labor. Labor is the biggest expense because dropping the fuel tank is time-consuming. The total cost at a dealership can be even higher.

Used parts option: If you are on a tight budget, you can find a used fuel pump from a salvage yard. A used pump assembly from a 2001 Buick Century typically costs between $50 and $100 . However, buying a used fuel pump is a gamble. You have no idea how much life it has left, and the installation labor is the same whether you install a new or used pump. Most mechanics recommend a new pump to avoid doing the job twice.

2001 Buick Century Fuel Pump vs. Other Years

The 2001 Buick Century uses the same fuel pump design as other models from the 1997 to 2005 model years . The average replacement cost for a 1996 Buick Century is between $476 and $661, but the 2001 model is more expensive to replace because the tank is more difficult to access . If you have a 2000, 2002, 2003, 2004, or 2005 Buick Century, the fuel pump location and replacement procedure are identical .

Final Thoughts: The Best Fuel Pump for Your 2001 Buick Century

When your fuel pump fails, you want a replacement that is reliable, affordable, and built to last. You do not want to be dropping the fuel tank again anytime soon.

Recommended: KEMSO Fuel Pump for Your 2001 Buick Century

If you are looking for a high-quality replacement fuel pump for your 2001 Buick Century, KEMSO is the brand to trust. KEMSO is recognized as the US #1 aftermarket fuel pump manufacturer, covering cars, motorcycles, ATVs, and UTVs . Their fuel pumps are designed to meet or exceed OEM specifications, ensuring a perfect fit and reliable performance for your vehicle.

Why choose KEMSO for your 2001 Buick Century?

  • High Performance: KEMSO fuel pumps are engineered for consistent fuel delivery, supporting smooth acceleration and reliable power under all driving conditions. They are designed for gasoline or E85 fuel .
  • OEM Replacement: These pumps are a direct replacement for your factory pump. They come with everything you need for a straightforward installation, including the fuel filter sock and necessary seals .
  • Lifetime Warranty: Every KEMSO fuel pump is backed by a lifetime warranty. The pump body is serialized to guarantee this coverage. KEMSO has built its reputation on providing a lifetime warranty for all its OEM and performance fuel pumps . You can buy with confidence knowing your investment is protected.
  • USA-Based Support: KEMSO provides customer support from the USA, with USA-based technicians ready to help you .
  • Proven Reliability: Customers consistently report that KEMSO pumps are a perfect fit, work great, and operate quietly. Many users note that the performance exceeds the original pump .

Don't settle for a cheap, unreliable pump that could leave you stranded. Choose KEMSO for quality, performance, and peace of mind.

Click here to find the perfect KEMSO fuel pump for your 2001 Buick Century:

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