Removal Procedure

Disconnect negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
Remove the throttle body air inlet duct.
Remove the accelerator cable bracket from the throttle body. Refer to ACCELERATOR CONTROLS CABLE BRACKET .
Remove the manifold air pressure (MAP) sensor. Refer to MANIFOLD ABSOLUTE PRESSURE SENSOR .
Remove the exhaust gas recirculation (EGR) valve. Refer to EGR VALVE .
Rotate the engine for service access. Refer to ROTATING THE ENGINE FOR SERVICE ACCESS .
Remove the ignition module and the ignition coils with the bracket.
Remove the spark plug wires from the engine right bank spark plugs.
Disconnect the oxygen sensor electrical connector.
Remove the evaporative emissions (EVAP) solenoid bracket.
Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement .
Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
Remove the catalytic converter. Refer to Catalytic Converter Replacement .
Remove the exhaust manifold heat shield bolts.
Remove the exhaust manifold heat shields.

Fig 1: Removing Exhaust Manifold Heat Shield & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the exhaust manifold nuts.
Remove the exhaust manifold.
Remove the exhaust manifold gasket.
Lower the vehicle.
Clean the engine right side exhaust manifold sealing surfaces and the cylinder head sealing surfaces. Refer to EXHAUST MANIFOLD CLEANING AND INSPECTION .
If you are REPLACING the engine right side exhaust manifold, remove the exhaust gas recirculation (EGR) valve pipe.
If you are REPLACING the engine right side exhaust manifold, remove the Heated Oxygen Sensor (HO2S). Refer to HEATED OXYGEN SENSOR .

Fig 2: Removing Exhaust Manifold, Gasket & Nuts
Courtesy of GENERAL MOTORS CORP.