WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Catalytic Converter Hangers
Courtesy of GENERAL MOTORS CORP.
Install the NEW catalytic converter pipe hangers (1), if necessary.
Remove the support from the exhaust system, if necessary.