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Home >> Cadillac >> 2009 >> Escalade EXT >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Three-Way Catalytic Converter Replacement >> Removal Procedure
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Removal Procedure

WARNING: Refer to Protective Goggles and Glove Warning .
WARNING: Refer to Exhaust Service Warning .
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the oil pan skid plate, if equipped. Refer to Oil Pan Skid Plate Replacement (2500/2500 with RPO NZZ) or Oil Pan Skid Plate Replacement (1500 with RPO NZZ) .
  3. Remove the transmission crossmember. Refer to Transmission Support Crossmember Replacement (4WD 2500 Series) or Transmission Support Crossmember Replacement (4WD 1500 Series) or Transmission Support Crossmember Replacement (2WD 2500 Series) or Transmission Support Crossmember Replacement (2WD 1500 Series) .
    4. Fig 1: View Of Catalytic Converter Assembly HO2S's
    GM1704008Courtesy of GENERAL MOTORS CORP.
  4. If replacing the three way catalytic converter remove the heated oxygen (HO2S) sensors (1 - 5) otherwise disconnect the heated oxygen (HO2S) sensors harness connectors.
    5. Fig 2: View Of Catalytic Converter To Exhaust Manifold Nuts & Exhaust Seals
    GM1708626Courtesy of GENERAL MOTORS CORP.
  5. Remove the catalytic converter pipe to the exhaust manifold nuts (1).
    6. Fig 3: Band Clamp
    GM1936687Courtesy of GENERAL MOTORS CORP.
  6. Loosen the band clamp bolt (1).
  7. Remove the catalytic converter pipe from the vehicle.
  8. Remove the exhaust seals (2 and 3) and discard.
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