Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the exhaust manifold pipe nuts.

Fig 1: View Of Left Exhaust Manifold Pipe & Nuts
Courtesy of GENERAL MOTORS CORP.
Lower the vehicle.

Fig 2: View Of Spark Plug Wire Retaining Bracket

GM317450

Courtesy of GENERAL MOTORS CORP.

Disconnect the spark plug wires from the spark plugs.
Remove the spark plug wire retainer bolts.
Position the wire harness on top of the engine.

Fig 3: View Of Spark Plug And Sparkplug Seat

GM14824

Courtesy of GENERAL MOTORS CORP.

Remove the spark plugs.

Fig 4: View Of TP Sensor, IAC Motor, ECT Sensor, Control Port Injector Module & Engine Harness Clip Bolt

GM782174

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine coolant temperature (ECT) sensor electrical connector (5).

Fig 5: Exhaust Manifold And Spark Plug Wire Shield Bolts/Stud (4.3L Engine)

GM188045

Courtesy of GENERAL MOTORS CORP.

Remove the exhaust manifold and spark plug wire shields bolts/stud.
Remove the exhaust manifold and plug wire shields.

Fig 6: Exhaust Manifold Gaskets (4.3L Engine)

GM328540

Courtesy of GENERAL MOTORS CORP.

Remove and discard the exhaust manifold gaskets.

Fig 7: Exhaust Manifold Heat Shield (4.3L Engine)

GM493850

Courtesy of GENERAL MOTORS CORP.

Remove the exhaust manifold heat shield bolts and shield, if required.
Clean all gasket mating surfaces.