GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1704518  Size: SH
  1. Remove the left side engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
  2. Disconnect the quick connect fitting (1) at the front of dash. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .

  3. Object Number: 329553  Size: SH
  4. Disconnect the chassis fuel bundle retainer (1) from the upper front of dash mounting stud (3).
  5. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Remove the exhaust intermediate pipe. Refer to Intermediate Pipe Replacement .

  7. Object Number: 67894  Size: SH
  8. Remove the floor panel tunnel reinforcement. Refer to Floor Panel Tunnel Panel Reinforcement Replacement .

  9. Object Number: 329574  Size: SH
  10. Disconnect the front chassis vacuum line from the underbody retainers (6).

  11. Object Number: 1704521  Size: SH
  12. Disconnect the front chassis vacuum line quick connect fitting (1) located on the left side of the vehicle, forward of the rear drive module. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .
  13. Remove the front chassis vacuum line from the vehicle.

Installation Procedure


    Object Number: 1704521  Size: SH
  1. Install the front chassis vacuum line to the vehicle.
  2. Connect the front chassis vacuum line quick connect fitting (1). Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .

  3. Object Number: 329574  Size: SH
  4. Connect the front chassis vacuum line to the underbody retainers (6).

  5. Object Number: 67894  Size: SH
  6. Install the floor panel tunnel reinforcement. Refer to Floor Panel Tunnel Panel Reinforcement Replacement .

  7. Object Number: 329553  Size: SH
  8. Install the exhaust intermediate pipe. Refer to Intermediate Pipe Replacement .
  9. Lower the vehicle.
  10. Connect the chassis fuel bundle retainer (1) to the upper front of dash mounting stud (3).

  11. Object Number: 1704518  Size: SH
  12. Connect the quick connect fitting (1) at the front of dash. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .
  13. Install the left side engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .