GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: Clean all evaporative emission (EVAP) tube connections and surrounding areas before disconnection in order to avoid possible EVAP system contamination.


    Object Number: 856667  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Disconnect the rear EVAP purge tube from the chassis EVAP purge pipe.
  3. Disconnect the rear EVAP purge tube from the EVAP canister.
  4. Cap the chassis EVAP purge pipe and the EVAP canister in order to prevent possible EVAP system contamination.

Installation Procedure


    Object Number: 856667  Size: SH
  1. Remove the caps from the chassis EVAP purge pipe and the EVAP canister.
  2. Connect the rear EVAP purge tube to the EVAP canister.
  3. Connect the rear EVAP purge tube to the chassis EVAP purge pipe.
  4. Lower the vehicle.