Here's a general outline. Specific steps and tool requirements might vary slightly depending on your vehicle's configuration, so always consult a repair manual specific to your 1997 Grand Prix GT. 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 wrench set (metric), various screwdrivers (Phillips and flathead), a fuel pump removal tool (sometimes called a fuel pump retaining ring pliers), possibly a fuel line disconnect tool, safety glasses, gloves, rags, and jack stands (if working under the car). You'll also likely need a fuel pressure gauge to verify the system is depressurized after disconnecting the fuel lines.
* Drain the Fuel Tank (Recommended): This significantly reduces the risk of fuel spillage. You can siphon the gas out or use a pump. This step isn't always absolutely necessary, but it's highly recommended.
* Locate the Fuel Pump: It's typically located under the rear passenger seat (access through the trunk) but check your repair manual to confirm.
2. Accessing the Fuel Pump:
* Remove Rear Seat (if applicable): Follow your repair manual for specific instructions on removing the rear seat. It usually involves removing seat belts and other fasteners.
* Access Panel: You should find an access panel to the fuel tank. This panel might need screws or clips removed.
3. Fuel Pump Replacement:
* Disconnect Fuel Lines: Carefully disconnect the fuel lines from the fuel pump. Have rags ready to absorb any spilled fuel. Use the appropriate fuel line disconnect tool if needed to avoid damaging the lines. Again, consult your repair manual for the correct procedure.
* Disconnect Electrical Connections: Disconnect the electrical connector(s) from the fuel pump.
* Remove Fuel Pump: This is where the fuel pump retaining ring pliers are crucial. These pliers usually fit over the retaining ring and allow you to remove it. If you don't have the right tool, you may damage the ring and/or the pump. The pump assembly should come out after the retaining ring is removed.
* Inspect the Fuel Pump: Check for any obvious damage to the pump or the sending unit.
* Install New Fuel Pump: Reverse the removal process to install the new pump. Make sure the electrical connectors are secure, and the fuel lines are properly connected and tightened. Double-check that the retaining ring is seated correctly.
* Reinstall Access Panel and Rear Seat: Reinstall the access panel and the rear seat, making sure everything is secured.
4. Post-Installation:
* Reconnect Battery: Reconnect the negative battery cable.
* Check for Leaks: Check for any fuel leaks around the fuel lines and the pump assembly.
* Prime the Fuel System: This might involve turning the ignition key to the "on" position several times (without starting the engine) to allow the fuel pump to prime. Your repair manual will give specific instructions on this.
* Start the Engine: Start the engine and listen for any unusual noises. Check for any leaks.
Important Considerations:
* Fuel Pressure: After the replacement, it is recommended to check fuel pressure using a fuel pressure gauge to ensure the new pump is working correctly. Your manual should specify the correct pressure range.
* Fuel Pump Relay: If you're having trouble, consider checking the fuel pump relay. A faulty relay can prevent the pump from working even if the pump itself is good.
This is a simplified overview. A repair manual specific to your 1997 Pontiac Grand Prix GT is absolutely essential for detailed instructions and diagrams. If you're not comfortable performing this repair yourself, take your car to a qualified mechanic. Working with fuel is dangerous; improper handling can lead to serious injury or death.
