Assembly Procedure

Install the fuel tank baffles. Refer to Fuel Tank Baffle Replacement .
Install the fuel tank heat shield. Refer to Fuel Tank Heat Shield Replacement .
Install the fuel filter (2) at the fuel filter bracket (1).

Fig 1: Removing Fuel Filter From Fuel Filter Bracket
Courtesy of GENERAL MOTORS COMPANY
Install a NEW fuel pump module seal (3).

Fig 2: Fuel Pump Module Lock Ring
Courtesy of GENERAL MOTORS COMPANY
Install the fuel pump module (2).
Install the fuel pump module lock ring (1).
Install the EN-48279 remover/installer (1) to the fuel pump module lock ring (2).

Fig 3: Fuel Pump Module Lock Ring
Courtesy of GENERAL MOTORS COMPANY
Using the EN-48279 remover/installer and a long breaker-bar, rotate the lock ring in a clockwise direction in order to lock the lock ring.
NOTE: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.
Remove the EN-6015 plugs from all connections.

Fig 4: Removing Fuel Feed Pipe From Fuel Tank Fuel Pump Module
Courtesy of GENERAL MOTORS COMPANY
Install the fuel return pipe (2) to the fuel tank fuel pump module (4). Refer to Plastic Collar Quick Connect Fitting Service .
Install the fuel feed pipe (1) to the fuel tank fuel pump module (4) and to the fuel filter housing (3). Refer to Plastic Collar Quick Connect Fitting Service .