Here's a general outline. Specific steps may vary slightly depending on the exact engine (2.4L or 3.4L). 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.
* Gather Tools: You'll need a socket set (metric), wrenches, screwdrivers (Phillips and flathead), fuel line disconnect tools, a fuel pump pliers (or similar tool to carefully remove the fuel lines), jack and jack stands (crucial for safety), safety glasses, gloves, rags, and possibly a fuel pressure gauge (to ensure proper pressure after installation). You might also need a fuel pump installation tool to help carefully lower the new pump into the tank.
* Locate the Fuel Pump: On a Grand Am, the fuel pump is typically located inside the fuel tank. Access is usually gained through the rear seat (though some models might require dropping the tank).
2. Accessing the Fuel Pump:
* Rear Seat Removal: Carefully remove the rear seat cushions and access panel (often held in place by clips or screws). Refer to your repair manual for specifics.
* Fuel Tank Access: You may need to lower the fuel tank. This typically involves loosening the fuel tank straps (usually bolts), disconnecting fuel lines and electrical connectors, and carefully lowering the tank (supports may be required to prevent dropping it). This is the most challenging part of the job. Support the tank securely to prevent damage or injury.
3. Fuel Pump Replacement:
* Disconnect Fuel Lines and Electrical Connections: Carefully disconnect the fuel lines using fuel line disconnect tools. Note which line goes where. Disconnect the electrical connector to the fuel pump. There will likely be a small retaining clip, be careful with this.
* Remove the Fuel Pump Assembly: The fuel pump is usually part of a larger assembly, often including the sending unit (fuel level sensor). You may need to carefully pry or unscrew the retaining ring around the pump assembly. Be careful not to damage the fuel tank.
* Install the New Fuel Pump Assembly: Carefully install the new fuel pump assembly, making sure it sits correctly and all components are aligned.
* Reconnect Fuel Lines and Electrical Connections: Carefully reconnect the fuel lines and the electrical connector.
4. Reassembly:
* Raise the Fuel Tank (if lowered): Carefully raise the fuel tank back into place and re-secure the straps.
* Reconnect the hoses and electrical connectors: Double-check all connections.
* Reinstall Rear Seat: Put the rear seat back in place.
* Reconnect Battery: Reconnect the negative battery terminal.
5. Testing:
* Check for Leaks: Carefully inspect all connections for leaks.
* Start the Engine: Start the engine and check for any issues. Listen for unusual noises from the fuel pump.
* Check Fuel Pressure (optional): Using a fuel pressure gauge, check the fuel pressure to ensure it's within specifications (refer to your repair manual).
Important Considerations:
* Fuel System Pressure: The fuel system may be under pressure. Relieve the pressure according to your repair manual's instructions before disconnecting any fuel lines.
* Safety Precautions: Fuel is highly flammable. Work in a well-ventilated area, away from any ignition sources.
* Repair Manual: A repair manual is indispensable for this job. The steps outlined above are a general guide; your specific vehicle may require different procedures.
* Professional Help: If you're uncomfortable performing this repair yourself, it's best to take your car to a qualified mechanic. Incorrect installation can lead to serious safety hazards.
This is a complex repair. If you're not comfortable with auto repair, it's best to have a professional do it. Improper installation can lead to serious problems. Always prioritize safety.
