Chevrolet Silverado / GMC Sierra. Manual — part 1794
4. Install the exhaust manifold bolts and stud.
Tighten: Tighten the bolts/stud to 30 N.m (22 lb ft).
Fig. 5: View Of Exhaust Manifold Heat Shield & Bolts
Courtesy of GENERAL MOTORS CORP.
5. Install the spark plugs. Refer to Spark Plug Replacement .
6. Position the exhaust manifold heat shield to the manifold and install the bolts.
Tighten: Tighten the bolts to 9 N.m (80 lb in).
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 6: View Of Exhaust Manifold Nuts
Courtesy of GENERAL MOTORS CORP.
7. Raise and support the vehicle.
8. Install the catalytic converter to exhaust manifold nuts (1).
Tighten: Tighten the nuts to 50 N.m (37 lb ft).
9. Lower the vehicle.
EXHAUST MANIFOLD REPLACEMENT - LEFT SIDE (4.8L, 5.3L, 6.0L, AND 6.2L)
Tools Required
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
J 42640 Steering Column Anti-Rotation Pin
Removal Procedure
Fig. 7: Identifying J 42640
Courtesy of GENERAL MOTORS CORP.
1. Install the J 42640 into the steering column lower access hole.
2. Remove the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left
Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .
3. Fully raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 8: View Of Exhaust Manifold, Gasket & Catalytic Converter
Courtesy of GENERAL MOTORS CORP.
4. Remove the catalytic converter to exhaust manifold nuts. (1500 series shown, 2500 series
similar).
5. Lower the vehicle part way in order to work through the wheel opening.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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