How do I replace the fuel pump on a 2006 chevy avea

I assume you meant a Chevy Aveo.
-Remove the rear seat.
-Remove fuel pump access cover.
-Disconnect electrical connector and fuel outlet line
-Remove lock ring
-Pull out fuel pump assembly from the tank.

Reverse this to install but make sure you clean out the groove where the gasket sits. A lot of the time dirt/debris will get in the groove when you remove the pump and can cause some leakage later on.