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 pipe heat shield bolts.

Fig 1: Exhaust Pipe Heat Shield Bolts (6.6L (LLY) Engine)
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Reposition the heat shield to the side in order to access the exhaust pipe to exhaust manifold bolts.

Fig 2: Exhaust Pipe To Exhaust Manifold Bolts (6.6L (LLY) Engine)

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Lower the vehicle in order to work through the front wheelhouse opening.
Remove the wheelhouse panel. Refer to Wheelhouse Panel Replacement in Body Front End.
Remove the charged air cooler outlet duct. Refer to Charged Air Cooler Hoses/Pipes Replacement (Left)Charged Air Cooler Hoses/Pipes Replacement (Right) in Engine Mechanical - 6.6L (LLY).
Remove the exhaust pipe to exhaust manifold bolts (1, 2, and 3).

Fig 3: Exhaust Manifold Heat Shield Bolt (6.6L (LLY) Engine)

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Remove the exhaust manifold heat shield bolts.
Remove the exhaust manifold heat shield.

Fig 4: Exhaust Manifold Bolts And Nuts Removal Sequence (6.6L (LLY) Engine)

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Remove the exhaust manifold bolts and nuts in the proper sequence.

Fig 5: View Of Exhaust Manifold (6.6L (LLY) Engine)

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Remove the exhaust manifold.
Remove and discard the exhaust manifold gasket.
Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection in Engine Mechanical - 6.6L (LLY).