Removal Procedure

Servicing of the catalytic converter, resonator or pipe requires the replacement of the exhaust system as a complete one-piece unit.

1. Raise and support the vehicle.
2. Remove the oxygen sensor wiring harness heat shield.
3. Disconnect the heated oxygen sensor at the pigtail.
4. Remove the heated oxygen sensor if replacement is necessary.
5. Remove the four nuts securing the catalytic converter to the exhaust manifold pipe.
   Fig 1: Catalytic Converter-To-Exhaust Manifold Pipe Nuts

   Courtesy of GENERAL MOTORS CORP.
6. Remove the catalytic converter gasket. Do not reuse the gasket.
7. Suitably support the exhaust system.
8. Remove the two bolts securing the center exhaust hangers to the rear suspension support brackets.
   Fig 2: Center Exhaust Hanger

   Courtesy of GENERAL MOTORS CORP.
9. Remove the bolt securing the rear exhaust hanger bracket to the rear compartment rail.
10. With the aid of an assistant, lower the exhaust system.
    Fig 3: Exhaust System Assembly

    Courtesy of GENERAL MOTORS CORP.
11. Remove the nut securing the rear exhaust hanger to the rear exhaust hanger bracket.
12. Remove the rear exhaust hanger bracket from the rear exhaust hanger.
    Fig 4: Rear Exhaust Hanger Bracket

    Courtesy of GENERAL MOTORS CORP.