GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.


    Object Number: 1670491  Size: SH

    Caution: Eye protection must be worn when drilling rivets to reduce the chance of personal injury.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drill out the rivets.
  3. Lower the heat shield until the heated oxygen sensor (HO2S) clips can be disconnected.
  4. Disconnect the HO2S clips from the heat shield.
  5. Remove the heat shield.

Installation Procedure


    Object Number: 1670491  Size: SH
  1. Raise the heat shield until the HO2S clips can be connected.
  2. Connect the HO2S clips to the heat shield.
  3. Position the heat shield to the floor panel.
  4. Using a rivet gun, install the rivets.
  5. Lower the vehicle.