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Home › Cadillac › 2007 › DTS 4.6 9 › Repair and Diagnosis › Engine Mechanical › Engine Exhaust System › Repair Instructions › Exhaust System Replacement › Removal Procedure

Removal Procedure

CAUTION: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.
CAUTION: Refer to Protective Goggles and Gloves Caution.
IMPORTANT: Servicing of the mufflers, resonator or pipe requires the replacement of the exhaust system as a complete assembly.
Fig 1: Identifying Oxygen Sensor Wiring Harness Heat Shield
GM1665113Courtesy of GENERAL MOTORS CORP.
  1. Remove the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
  2. Remove the connector position assurance (CPA) retainer.
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
    4. Fig 2: Identifying HO2S
    GM1670531Courtesy of GENERAL MOTORS CORP.
  4. Remove the HO2S.
    5. Fig 3: Removing Catalytic Converter
    GM1670482Courtesy of GENERAL MOTORS CORP.
  5. Remove the catalytic converter to the rear exhaust manifold pipe nuts.
  6. Suitably support the exhaust system.
    7. Fig 4: View Of Exhaust Hanger Bracket Bolts
    GM1670483Courtesy of GENERAL MOTORS CORP.
  7. Remove the exhaust hanger to the rear suspension support bracket bolts.
    8. Fig 5: View Of Rear Exhaust Hanger To Hanger Bracket Nuts
    GM1670485Courtesy of GENERAL MOTORS CORP.
  8. Remove the rear exhaust hanger to hanger bracket nuts.
    9. Fig 6: View Of Rear Exhaust Hanger Bracket To Rear Compartment Side Rail Bolts
    GM1670480Courtesy of GENERAL MOTORS CORP.
  9. Remove the rear exhaust hanger bracket to the rear compartment side rail bolts.
  10. With the aid of an assistant, lower the exhaust system.
  11. Remove and discard the catalytic converter gasket.
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