FixVault

Removal Procedure

CAUTION: Refer to Exhaust Service Caution .
    Fig 1: View Of HO2S Electrical Connector, Sensor 2 (Bank 1 Shown, Bank 2 Similar)
    GM1201222Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the left and right bank 2 heated oxygen sensor (HO2S) electrical connectors (bank 1 shown, bank 2 similar).
  3. Remove the HO2S wiring harnesses from the transmission case.
  4. Fig 2: Identifying Muffler Pipes At Left And Right Side Catalytic Converters
    GM1224063Courtesy of GENERAL MOTORS CORP.
  5. Remove the exhaust pipe nuts and separate the exhaust system from the catalytic converters.
  6. Fig 3: View Of Muffler Front Hanger & Frame Hanger Rod
    GM1559373Courtesy of GENERAL MOTORS CORP.
  7. Remove the muffler front hanger from the frame hanger rod.
  8. Fig 4: View Of Tail Pipe Hangers & Muffler Rods
    GM1559372Courtesy of GENERAL MOTORS CORP.
  9. Remove the tail pipe hangers from the muffler rods.
  10. Fig 5: Identifying Floor Panel Tunnel Brace
    GM772383Courtesy of GENERAL MOTORS CORP.
  11. Remove the floor panel tunnel brace bolts.
  12. Remove the floor panel tunnel brace from the floor panel.
  13. Fig 6: View Of Exhaust System
    GM772373Courtesy of GENERAL MOTORS CORP.
  14. With the aid of an assistant, lower the exhaust system.
  15. Inspect and replace the exhaust system to catalytic converter seals if excessive wear or damage is noticed.
  16. Fig 7: View Of Exhaust System Components
    GM786659Courtesy of GENERAL MOTORS CORP.
  17. Remove the muffler rear hangers (2) from the muffler(s).
  18. Remove the HO2S from the exhaust system. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .