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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Three-Way Catalytic Converter Replacement >> Removal Procedure

Removal Procedure

WARNING:

Refer to Exhaust Service Warning .

WARNING:

Refer to Protective Goggles and Glove Warning .

    Fig 1: View Of HO2S Electrical Connector
    GM313264Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Disconnect the heated oxygen sensor (HO2S) electrical connectors from the main harness connectors.
    3. Fig 2: Identifying Catalytic Converter To Exhaust Manifold Nuts
    GM1954887Courtesy of GENERAL MOTORS CORP.
  3. Remove the nuts (1) from the catalytic converter pipe to the exhaust manifolds.
    4. Fig 3: View Of Catalytic Converter Pipe-To-The Muffler Nuts
    GM2292613Courtesy of GENERAL MOTORS CORP.
  4. Remove the nuts from the catalytic converter pipe to the muffler.
  5. Remove the catalytic converter from the vehicle.
  6. Remove and discard the exhaust manifold seals.
  7. If replacing the catalytic converter pipe, remove the oxygen sensors as necessary. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 .
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