Important: When replacing the evaporative emission (EVAP) pipe, always replace the pipe with original equipment or parts that meet the GM specifications for this part. The replacement pipe must have the same type of fittings as the original pipe in order to ensure the integrity of the connection.

Caution: Refer to Battery Disconnect Caution in the Preface section.




1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
3. Drain the fuel tank. Refer to Fuel Tank Draining .
4. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
5. Clean all fuel and EVAP pipe and hose connections and the surrounding areas before disconnection in order to avoid possible contamination of the fuel system.
6. Remove the fuel tank. Refer to Fuel Tank Replacement .
7. Remove the rear EVAP pipe from the fuel sender, the fuel tank roll over valve and the fuel tank clips.
8. Cap the fuel sender EVAP pipe and the fuel tank roll over valve.

1. Remove the caps from the fuel sender EVAP pipe and the fuel tank roll over valve.
2. Connect the rear EVAP pipe to the fuel sender, the fuel tank roll over valve, and the fuel tank clips.



3. Install the fuel tank. Refer to Fuel Tank Replacement .
4. Lower the vehicle.
5. Refill the fuel tank.
6. Connect the negative battery cable.
7. Tighten the fuel filler cap.
8. Perform the following procedure in order to inspect for leaks:

8.1.	Turn ON the ignition for 2 seconds.

8.2.	Turn OFF the ignition for 10 seconds.

8.3.	Turn ON the ignition.

8.4.	Inspect for fuel leaks.