1. Preparation:
* Safety First: Disconnect the negative battery cable.
* Gather Tools: You'll need jack stands, a jack, various sockets and wrenches (likely metric), fuel line disconnect tools, a fuel pump removal tool (often a special socket or strap wrench), safety glasses, gloves, rags, and potentially a torque wrench.
* Obtain a New Fuel Pump: Make sure you get the correct fuel pump for your specific Seville model and engine. The part number should be verified at an auto parts store using your VIN.
* Drain Fuel (Optional but Recommended): Consider siphoning some fuel from the tank to reduce the amount of fuel you'll be working around. This reduces the risk of spills.
2. Accessing the Fuel Pump:
* Lower the Fuel Tank: This is usually the most challenging part. The process varies depending on the specific Seville model. You'll likely need to access the tank from underneath the vehicle. This usually involves removing access panels or lowering the fuel tank itself. Consult your repair manual for the precise steps involved in lowering the tank. Expect to disconnect fuel lines, electrical connectors, and possibly the fuel tank straps.
* Locate the Fuel Pump Assembly: Once you have access to the fuel tank, locate the fuel pump access cover. This is usually a circular cover on top of the tank. You may need to remove the access panel or even remove the tank to access it directly.
3. Removing the Fuel Pump:
* Disconnect Electrical Connections: Disconnect the electrical connector from the fuel pump.
* Disconnect Fuel Lines: Use fuel line disconnect tools to carefully disconnect the fuel lines. Be prepared for some fuel spillage—have rags ready.
* Remove the Fuel Pump Assembly: This is where the fuel pump removal tool comes in handy. The pump is often held in place by a retaining ring or clamp. Use the tool to carefully remove the pump assembly.
4. Installing the New Fuel Pump:
* Install the New Fuel Pump Assembly: Carefully install the new fuel pump assembly, ensuring everything is seated correctly.
* Reconnect Fuel Lines: Connect the fuel lines securely, making sure they are properly seated.
* Reconnect Electrical Connections: Connect the electrical connector to the new fuel pump.
* Raise the Fuel Tank: Carefully raise the fuel tank back into position, securing all the connections and straps.
5. Final Steps:
* Reconnect the Negative Battery Cable: Reconnect the negative battery cable.
* Check for Leaks: Check all fuel lines and connections for leaks.
* Start the Car: Start the car and let it run for a few minutes to ensure the new fuel pump is working correctly. Check for any codes that may have been triggered.
Important Considerations:
* Pressure: Fuel systems operate under pressure. Release pressure before disconnecting any lines. Consult your repair manual for the proper procedure.
* Fuel Vapor: Fuel vapors are flammable and dangerous. Work in a well-ventilated area, away from ignition sources.
* Repair Manual: A service manual specific to your 2000 Cadillac Seville is essential. It will provide detailed diagrams, torque specifications, and other crucial information not included in this general overview. This information is crucial to avoid damage to your vehicle.
This is a complex repair. If you are not comfortable working on your car, take it to a qualified mechanic. Improperly installing a fuel pump can be dangerous and lead to further damage to your vehicle.
