1. Disconnect the negative battery terminal.
2. Locate the fuel pump access panel in the trunk.
3. Remove the fuel pump access panel.
4. Disconnect the fuel lines from the fuel pump.
5. Remove the electrical connector from the fuel pump.
6. Unbolt the fuel pump from the fuel tank.
7. Remove the fuel pump from the fuel tank.
8. Install the new fuel pump in the reverse order of removal.
9. Reconnect the negative battery terminal.
Here are some additional tips for replacing the fuel pump on a 2003 Pontiac Sunfire:
* Be sure to use new fuel lines and O-rings when reinstalling the fuel pump.
* Tighten the fuel pump bolts to the proper torque specifications.
* Be careful not to damage the fuel tank when removing and installing the fuel pump.
* If you are not comfortable performing this repair yourself, you can have it done by a qualified mechanic.
