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 exhaust muffler will be needed when replacing the exhaust extension pipe on an originally equipped, welded system.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Support the exhaust muffler.

Fig 1: Exhaust Extension Pipe

Courtesy of GENERAL MOTORS CORP.

Cut the exhaust extension pipe just forward of the weld at the front of the exhaust muffler.
Release the muffler from the underbody hanger insulators and remove the exhaust muffler.

Fig 2: View Of Catalytic Converter Pipe-To-Exhaust Extension Pipe Nuts (LSJ)

Courtesy of GENERAL MOTORS CORP.

Support the catalytic converter pipe.
Remove the catalytic converter pipe-to-exhaust extension pipe nuts.
Release the exhaust extension pipe from the underbody hanger insulators, and support the extension pipe.
Separate the extension pipe from the converter pipe and remove the extension pipe from the vehicle.
Clean the converter pipe flange surface of any remaining gasket material.