GM Service Manual Online
For 1990-2009 cars only

Evaporative Emission Canister Replacement Short Wheel Base

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 669545  Size: SH
  3. Disconnect the evaporative emission (EVAP) vent hose (3), purge pipe (5), and vapor pipe (4) from the EVAP canister (1).
  4. Remove the forward attaching nut from the EVAP canister bracket.
  5. Remove the two rear attaching nuts (2) from the EVAP canister bracket at the fuel tank.
  6. Lower the EVAP canister assembly.
  7. Pull the rear canister bracket flange away from the EVAP canister.
  8. Lift the rear of the EVAP canister from the bracket to release the forward tab.

Installation Procedure

  1. Install the EVAP canister into the forward tab of the canister bracket.
  2. Press the rear of the EVAP canister down in order to engage the rear bracket tabs.

  3. Object Number: 669545  Size: SH
  4. Install the EVAP canister assembly to the fuel tank.
  5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install the two attaching nuts (2) to the EVAP canister bracket at the fuel tank studs.
  7. Tighten
    Tighten the attaching nuts to 9 N·m (80 lb in).

  8. Install the forward attaching nut to the canister bracket.
  9. Tighten
    Tighten the attaching nuts to 9 N·m (80 lb in).

  10. Connect the EVAP vent hose (3), purge pipe (5), and vapor pipe (4) to the EVAP canister (1).
  11. Lower the vehicle.

Evaporative Emission Canister Replacement Long Wheel Base

Removal Procedure

  1. Remove the fuel tank. Refer to Fuel Tank Replacement .

  2. Object Number: 786743  Size: SH
  3. Disconnect the evaporative emission (EVAP) canister vent pipe (7) from the EVAP canister (1).
  4. Disconnect the EVAP canister vapor pipe (6) from the EVAP canister (1).
  5. Disconnect the EVAP canister purge pipe (8) from the EVAP canister (1).
  6. Use a suitable tool to remove the EVAP canister (1) from the fuel tank.

Installation Procedure


    Object Number: 786743  Size: SH

    Important: High resistance is normal when installing the EVAP canister.

  1. Position and push the EVAP canister (1) into the EVAP canister bracket of the fuel tank.
  2. Pull up on the EVAP canister (1) to ensure a proper lock to the fuel tank bracket.
  3. Connect the EVAP canister purge pipe (8) to the EVAP canister (1).
  4. Connect the EVAP canister vapor pipe (6) to the EVAP canister (1).
  5. Connect the EVAP canister vent pipe (7) to the EVAP canister (1).
  6. Install the fuel tank. Refer to Fuel Tank Replacement .