Here's a general outline. Specific steps may vary slightly depending on the engine (2.2L or 2.4L) and the exact model of your Cavalier. 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 for this type of work.
Tools You'll Likely Need:
* Socket set (metric)
* Wrenches (metric)
* Screwdrivers (Phillips and flathead)
* Fuel line disconnect tools
* Pliers
* Jack and jack stands (crucial for safety!)
* Wheel chocks
* Safety glasses
* Gloves
* Shop rags
* Fuel pump pliers (may be needed to remove the retaining ring on the pump)
* New fuel pump (ensure it's the correct one for your Cavalier)
* New fuel filter (recommended)
* Torque wrench (for proper tightening)
* Possibly a fuel pressure gauge (to verify pressure after installation)
General Steps (Consult Your Repair Manual for Precise Instructions):
1. Safety First: Disconnect the negative battery terminal.
2. Access the Fuel Pump: This usually involves lowering the fuel tank. This can be done by:
* Lowering the tank (most common method): This requires accessing the tank straps, usually located under the vehicle. You'll need to loosen or remove the straps to lower the tank enough to access the fuel pump assembly. Be prepared for some fuel spillage; siphon out as much fuel as possible beforehand.
* Access through the trunk (less common, depends on the year and model): Some Cavaliers might have an access panel in the trunk that allows access to the pump without dropping the tank. Check your repair manual.
3. Disconnect the Fuel Lines and Electrical Connections: Carefully disconnect the fuel lines using the proper disconnect tools. There will be both a supply line and a return line. Be prepared for some fuel spillage. Also, disconnect the electrical connector to the fuel pump.
4. Remove the Fuel Pump Assembly: This usually involves removing a retaining ring or bolts securing the pump assembly to the tank. Your repair manual will show you the precise method.
5. Install the New Fuel Pump Assembly: Carefully install the new fuel pump assembly, ensuring the gasket is properly seated. Make sure everything aligns correctly.
6. Reconnect the Fuel Lines and Electrical Connections: Carefully reconnect the fuel lines and the electrical connector, ensuring secure connections.
7. Raise the Fuel Tank (If Necessary): Carefully raise the fuel tank back into its position and secure the straps.
8. Reconnect the Battery: Reconnect the negative battery terminal.
9. Prime the Fuel System: After reconnecting the battery, you may need to prime the fuel system. This involves turning the ignition key to the "on" position for a few seconds, repeating a few times, to allow the pump to fill the lines.
10. Check for Leaks: Inspect for any fuel leaks around the fuel lines and pump connections.
11. Test Drive: Once you're confident there are no leaks, test drive the vehicle to ensure the fuel pump is functioning correctly. Listen for the pump to engage when the ignition is turned on.
Important Considerations:
* Fuel Pressure: A fuel pressure gauge can help diagnose fuel pump problems before and after replacement. A low fuel pressure reading could indicate a faulty pump or another issue.
* Safety: Work in a well-ventilated area, away from open flames or sparks. Fuel is flammable and dangerous.
* Repair Manual: This is absolutely crucial. Improper installation could lead to vehicle damage or even injury.
This is a simplified overview. A detailed repair manual is essential for successfully completing this repair. If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Incorrect installation can lead to serious problems.
