FixVault

Removal Procedure

    WARNING:

    Refer to Exhaust Service Warning .

  1. Ignition OFF.
  2. WARNING:

    Refer to Battery Disconnect Warning .

  3. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  4. Fig 1: Identifying Left Catalytic Converter To Exhaust Manifold Retaining Nuts
    GM1949706Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The left catalytic converter to exhaust manifold retaining nuts (1) are single use parts. They must be discarded after removal.

  5. Remove the left catalytic converter to exhaust manifold retaining nuts (1).

    Discard the nuts.

  6. Disconnect the left catalytic converter (2) from the exhaust manifold (3).
  7. WARNING:

    To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

  8. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  9. Fig 2: Identifying Left Pre-Catalytic Converter Heated Oxygen Sensor (HO2S) Electrical Connector
    GM1950735Courtesy of GENERAL MOTORS COMPANY
  10. Disconnect the left pre-catalytic converter heated oxygen sensor (HO2S) electrical connector (1).
  11. Fig 3: Identifying Intermediate Exhaust Assembly To Left Catalytic Converter Retaining Nuts
    GM1947042Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The exhaust crossover pipe assembly to left catalytic converter retaining nuts (3) are single use parts. They must be discarded after removal.

  12. Remove the exhaust crossover pipe assembly to left catalytic converter retaining nuts (3).

    Discard the nuts.

  13. Disconnect the exhaust crossover pipe assembly (2) from the left catalytic converter (1).
  14. Fig 4: View Of Left Catalytic Converter
    GM1949679Courtesy of GENERAL MOTORS COMPANY
  15. Remove the left catalytic converter (1) from the vehicle.
  16. Remove the left pre-catalytic converter HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .