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Removal Procedure

    WARNING:

    Refer to Exhaust Service Warning .

    WARNING:

    Refer to Protective Goggles and Glove Warning .

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the left post-catalytic converter HO2S . Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
  3. Remove the right post-catalytic converter HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 .
    4. Fig 1: Exhaust System Components
    GM2968577Courtesy of GENERAL MOTORS COMPANY
  4. Remove the catalytic converter fasteners (1) and remove the exhaust muffler (4) from the exhaust isolators (3).
  5. Support the exhaust system with a suitable jack or mechanics wire.
  6. Discard the catalytic converter exhaust seals (2) and fasteners (1).
    7. Fig 2: Transmission Tunnel Cross-Brace To Body Retaining Bolts
    GM1949712Courtesy of GENERAL MOTORS COMPANY
  7. Remove the underbody brace fasteners (2).
  8. Remove the underbody brace (1).
    9. Fig 3: Rear Exhaust Isolator Hanger Brackets & Fasteners
    GM2968576Courtesy of GENERAL MOTORS COMPANY
  9. Remove the rear exhaust isolator hanger bracket fasteners (1) above the left and right rear mufflers.
    10. Fig 4: Identifying Center Insulator Hanger Bracket To Differential Retaining Bolts
    GM1947047Courtesy of GENERAL MOTORS COMPANY
  10. Remove the center exhaust isolator hanger bracket to differential retaining fastener (1).
  11. Detach the exhaust system assembly from the center exhaust isolator hanger bracket to differential retaining stud (1).
  12. With the aid of an assistant or using a suitable jack; carefully lower the exhaust system from the vehicle.
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