GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Riviera 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Evaporative Emission Canister Replacement

Removal Procedure
  1. Raise the vehicle.

    2. Object Number: 104621 Size: SH
  2. Mark the hoses for installation on the canister.
  3. Remove the EVAP vent hose (1).
  4. Remove the tank vapor hose (2).
  5. Remove the purge hose (3).

    6. Object Number: 104774 Size: SH
  6. Remove the nuts (2) from the canister.
  7. Remove the canister (1) from the bracket by releasing tabs.

Installation Procedure

    Object Number: 104774 Size: SH
  1. Install the EVAP canister on the bracket.
  2. Install the EVAP canister assembly into the vehicle.
  3. Assemble the EVAP canister to the underbody with the 3 nuts.

    4. Tighten
    Tighten the EVAP Canister nuts to 9 N·m (80 lb in).


    Object Number: 104621 Size: SH
  4. Install the purge hose (3) to the canister.
  5. Install the tank vapor hose (2) canister.
  6. Install the vent hose (1) to the canister
  7. Lower the vehicle.