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Chevrolet Silverado / GMC Sierra. Manual - part 1801
4. Install the exhaust manifold bolts and stud.
Tighten: Tighten the bolts/stud to 30 N.m (22 lb ft).
Fig. 33: View Of Exhaust Manifold Heat Shield & Bolts
Courtesy of GENERAL MOTORS CORP.
5. Install the spark plugs. Refer to Spark Plug Replacement .
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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).
Fig. 34: View Of Catalytic Converter To 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.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
EXHAUST MANIFOLD REPLACEMENT - RIGHT SIDE (4.8L, 5.3L, 6.0L, AND 6.2L)
Removal Procedure
Fig. 35: View Of Exhaust Manifold, Gasket & Catalytic Converter
Courtesy of GENERAL MOTORS CORP.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement
- Bank 2 Sensor 1 (1500 Series) or Heated Oxygen Sensor Replacement - Bank 2
Sensor 1 (2500 Series) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
(2500 Series - Cab/Chassis) .
2. Fully raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove the catalytic converter to exhaust manifold nuts, 1500 series shown, 2500 series
similar.
Fig. 36: Locating Spark Plug Wires
Courtesy of GENERAL MOTORS CORP.
4. Remove the right wheelhouse liner. Refer to Front Wheelhouse Liner Replacement -
Right Side (GMC) or Front Wheelhouse Liner Replacement - Right Side
(Chevrolet) .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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