Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Catalytic Converter To Exhaust Manifold Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 .
Remove the catalytic converter to exhaust manifold nuts (1).
Lower the vehicle.

Fig 2: View Of Exhaust Manifold Heat Shield & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the exhaust manifold heat shield bolts and shield.
Remove the spark plugs. Refer to Spark Plug Replacement .
Reposition the spark plug wires out of the way, if necessary.

Fig 3: View Of Catalytic Converter Seal & Exhaust Manifold Components

Courtesy of GENERAL MOTORS CORP.

Remove the exhaust manifold bolts.
Remove the exhaust manifold and gaskets (1). Discard the gaskets.
Remove the exhaust manifold to catalytic converter seal (2). Discard the seal.