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Removal Procedure

    NOTE: Do not over-flex or damage the flex decoupler joint when moving the flex decoupler joint from the normal mounting position. The flex decoupler joint will flex a maximum of six degrees which is equivalent to the pipes connected at the joint which move 1 inch for each foot length of pipe. A three foot pipe would move a maximum of three inches.
    IMPORTANT: A service muffler will be needed when replacing the intermediate pipe on an originally equipped, welded system.
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Support the 3-way catalytic converter.
  3. Fig 1: Identifying Cutline On Intermediate Pipe
    GM25822Courtesy of GENERAL MOTORS CORP.
  4. Cut the intermediate pipe (1) at the muffler (2).
  5. Fig 2: View of Intermediate Pipe and 3-Wat Catalytic Converter
    GM25271Courtesy of GENERAL MOTORS CORP.
  6. Remove the intermediate pipe from the 3-way catalytic converter.
  7. Fig 3: View of Intermediate Pipe
    GM182079Courtesy of GENERAL MOTORS CORP.
  8. Remove the intermediate pipe from the hanger.
  9. Remove the intermediate pipe.
  10. Fig 4: View of Catalytic Converter Seal
    GM25299Courtesy of GENERAL MOTORS CORP.
  11. Remove the 3-way catalytic converter seal.
  12. Clean the flange surface.