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 intermediate pipe will be needed when replacing the intermediate pipe on an originally equipped, welded system.

Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

Fig 1: Identifying Cutline On Intermediate Pipe

Courtesy of GENERAL MOTORS CORP.

Cut the intermediate pipe forward of the muffler using the service part as a template for making the cut (1).

Fig 2: Removing Intermediate Pipe Bolts At Catalytic Converter Downpipe

Courtesy of GENERAL MOTORS CORP.

Remove the intermediate pipe bolts at catalytic converter downpipe.
Remove the intermediate pipe from the hangers.

Fig 3: Removing Intermediate Pipe

Courtesy of GENERAL MOTORS CORP.

Remove the intermediate pipe.

Fig 4: Removing Catalytic Converter Downpipe Gasket

Courtesy of GENERAL MOTORS CORP.

Remove catalytic converter downpipe gasket.
Clean the flange surface.