Chevrolet Silverado / GMC Sierra. Manual — part 1793
Fig. 1: View Of Exhaust Manifold Nuts
Courtesy of GENERAL MOTORS CORP.
1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the catalytic converter to exhaust manifold nuts (1).
3. Lower the vehicle.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 2: View Of Exhaust Manifold Heat Shield & Bolts
Courtesy of GENERAL MOTORS CORP.
4. Remove the exhaust manifold heat shield bolts and shield.
5. Remove the spark plugs. Refer to Spark Plug Replacement .
6. Reposition the spark plug wires out of the way, if necessary.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 3: View Of Catalytic Converter Seal & Exhaust Manifold Components
Courtesy of GENERAL MOTORS CORP.
7. Remove the exhaust manifold bolts and stud.
8. Remove the exhaust manifold and gaskets (1). Discard the gaskets.
9. Remove the exhaust manifold to catalytic converter seal (2). Discard the seal.
Installation Procedure
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 4: View Of Catalytic Converter Seal & Exhaust Manifold Components
Courtesy of GENERAL MOTORS CORP.
1. Install a NEW exhaust manifold to catalytic converter seal (2) into the relief in the catalytic
converter.
2. Place the exhaust manifold into position and install the manifold studs to the catalytic
converter.
3. Place the NEW exhaust manifold gaskets (1) between the manifold and the cylinder head.
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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