Removal Procedure

Servicing of the catalytic converter, resonator or pipe requires the replacement of the exhaust system as a complete 1-piece unit.

1. Raise and support the vehicle. Refer to LIFTING & JACKING VEHICLE .
2. Remove the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
3. Disconnect the heated oxygen sensor at the pigtail.
   Fig 1: Catalytic Converter

   Courtesy of GENERAL MOTORS CORP.
4. Remove the heated oxygen sensor if replacement is necessary. Refer to HEATED OXYGEN SENSOR (HO2S) REPLACEMENT BANK 1 SENSOR 2 .
5. Remove the 4 nuts securing the catalytic converter to the rear exhaust manifold pipe.
6. Remove the catalytic converter gasket. Do not reuse the gasket.
7. Suitably support the exhaust system.
8. Remove the 2 bolts securing the center exhaust hangers to the rear suspension support brackets.
   Fig 2: Center Exhaust Hanger to Rear Suspension Support Brackets Bolts

   Courtesy of GENERAL MOTORS CORP.
9. Remove the 2 bolts securing the rear exhaust hanger brackets to the rear compartment rails.
10. With the aid of an assistant, lower the exhaust system.
    Fig 3: Rear Exhaust Hanger Brackets to Rear Compartment Rails Bolts

    Courtesy of GENERAL MOTORS CORP.
11. Remove the 2 nuts securing the rear exhaust hangers to the rear exhaust hanger brackets.
    Fig 4: Rear Exhaust Hanger Brackets

    Courtesy of GENERAL MOTORS CORP.
12. Remove the rear exhaust hangers brackets from the rear exhaust hanger.