Here's a general outline. Specific steps may vary slightly depending on your exact engine (3.8L V6 is common) and whether you have a fuel-injected or carbureted engine (virtually all 2002 LeSabres are fuel-injected). Always consult a repair manual specific to your vehicle's year, make, and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Preparation:
* Safety First: Disconnect the negative battery cable. Work in a well-ventilated area. Have a fire extinguisher handy.
* Gather Tools: You'll need jack stands, a jack, sockets (various sizes), wrenches, screwdrivers (possibly Phillips and flathead), fuel line disconnect tools, a fuel pump removal tool (often a specialized socket), safety glasses, gloves, and possibly a fuel pump strainer replacement. You may also need a torque wrench for proper tightening.
* Drain Fuel: If possible, run the car until nearly empty to minimize fuel spillage.
* Locate the Fuel Pump: The fuel pump is usually located inside the fuel tank, requiring tank removal or access through a dedicated access panel.
2. Fuel Tank Access:
* Drop the Tank (Most Common): This often involves lowering the fuel tank from underneath the vehicle. This requires:
* Supporting the tank safely with jack stands.
* Disconnecting the fuel lines (carefully), electrical connector, and fuel tank straps. You'll likely need the fuel line disconnect tools.
* Carefully lowering the tank. Be aware of fuel remaining in the tank.
* Access Panel (Less Common): Some models may have an access panel in the trunk or under the rear seat. Check your repair manual to see if yours does. This would significantly simplify the process.
3. Fuel Pump Removal:
* Remove the Fuel Pump Access Cover: Once you have access to the fuel pump, remove the retaining ring or cover. This may require specialized tools.
* Disconnect the Electrical Connector: Disconnect the electrical connector from the fuel pump.
* Remove the Fuel Pump: Using the fuel pump removal tool (if needed), carefully remove the fuel pump from the tank. Note how the parts are assembled for reinstallation.
* Inspect the Fuel Strainer/Filter: It's recommended to replace the fuel filter/strainer, often located inside the pump assembly, during this process.
4. Fuel Pump Installation:
* Install the new Fuel Pump: Carefully install the new fuel pump, making sure to align any components correctly.
* Reconnect the Electrical Connector: Securely reconnect the fuel pump's electrical connector.
* Reinstall the Fuel Pump Access Cover: Carefully replace the retaining ring or cover.
* Raise and Secure the Fuel Tank (if applicable): Reinstall the fuel tank, making sure the fuel lines, electrical connector, and straps are properly secured.
* Reconnect the Fuel Lines: Securely reconnect the fuel lines. You may need to use clamps.
* Reconnect Battery: Reconnect the negative battery cable.
5. Post-Installation:
* Check for Leaks: Carefully inspect all fuel line connections for leaks.
* Prime the Fuel System: You might need to prime the fuel system by turning the ignition key to the "on" position (but not starting) a few times to build pressure.
* Start the Engine: Start the engine and listen for any unusual noises or check for leaks again.
Important Considerations:
* Fuel Pressure: Some fuel pumps need to be primed or bled to start working properly. Check your service manual.
* Safety Precautions: Gasoline is highly flammable and explosive. Take extreme caution when working with it.
* Professional Help: If you're uncomfortable performing this repair yourself, consider taking your vehicle to a qualified mechanic. This is a job with potential for significant problems if not done correctly.
This is a general overview. Detailed instructions with pictures and diagrams are essential for successful completion. Refer to your vehicle's repair manual for precise procedures and safety warnings specific to your 2002 Buick LeSabre. Incorrect installation could lead to serious injury or damage to your vehicle.
