Removal Procedure

Fig 1: EVAP Crossover Pipe & Tank Crossover Hose

Courtesy of GENERAL MOTORS COMPANY

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (LS7 or LS9) , Battery Negative Cable Disconnection and Connection (LS3) .
Relieve the fuel system pressure. Refer to the Fuel Pressure Relief (Without CH 48027) , Fuel Pressure Relief (CH 48027) .
Drain the fuel tanks below the level of the fuel tank crossover hose. Refer to Fuel Tank Draining .
For vehicles equipped with automatic transmission, remove the left and right muffler. Refer to Exhaust Muffler Replacement - Right Side , , and to Exhaust Muffler Replacement - Left Side .
Disconnect the tank crossover hose (5) at the right fuel tank and the left fuel tank.
Disconnect the evaporative emission (EVAP) pipe (2) at the right tank EVAP pipe (3) and the left tank EVAP pipe (1).
Remove the rear EVAP pipe (2).
Cap the open pipes in order to prevent possible contamination.