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Home >> Cadillac >> 2004 >> Seville >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Catalytic Converter Replacement >> Removal Procedure

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the exhaust system near the resonator with a suitable jack.
  3. Remove the oxygen sensor. It is not necessary to disconnect the electrical connector.
    4. Fig 1: View Of Exhaust Pipe To Catalytic Converter
    GM71703Courtesy of GENERAL MOTORS CORP.
  4. Remove the nuts securing the catalytic converter to the exhaust manifold pipe.
    5. Fig 2: View Of Center Exhaust Hangers & Bolts
    GM691380Courtesy of GENERAL MOTORS CORP.
  5. Remove the bolts securing the center exhaust hangers to the rear suspension support brackets.
  6. Remove the catalytic converter from the manifold pipe.
  7. Lower the exhaust system.
  8. Remove the catalytic converter gasket. Do not reuse the gasket.
    9. Fig 3: Separating Catalytic Converter & Resonator Inlet Pipe
    GM908799Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure the cut (2) is made on the catalytic converter side of the pipe.
  9. Cut the catalytic converter (3) from the resonator inlet pipe (1) behind the step 2 but as close to the step as the tool will permit. The replacement catalytic converter will slide over the inlet pipe.
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