Chevrolet Silverado / GMC Sierra. Manual — part 1796

Fig. 14: View Of Exhaust Manifold, Manifold Bolts & Gasket
Courtesy of GENERAL MOTORS CORP.

2. Clean the threads of the exhaust manifold bolts.

3. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N

10953488), or equivalent to the threads of the exhaust manifold bolts.

4. Install a NEW catalytic converter seal to the catalytic converter.

5. Position the NEW exhaust manifold gasket and exhaust manifold to the cylinder head.

6. Ensure that the exhaust manifold is seated to the catalytic converter.

7. Install the exhaust manifold bolts.

Tighten:

1. Tighten the bolts a first pass to 15 N.m (11 lb ft). Tighten the exhaust manifold bolts

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

beginning with the center 2 bolts. Alternate from side-to-side, and work toward the
outside bolts.

2. Tighten the bolts a final pass to 20 N.m (15 lb ft). Tighten the exhaust manifold bolts

beginning with the center 2 bolts. Alternate from side-to-side, and work toward the
outside bolts.

8. Using a flat punch, bend the gasket tab at the rear of the gasket around the cylinder head

edge.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 15: View Of Steering Shaft, Coupling Bolt & Nut
Courtesy of GENERAL MOTORS CORP.

9. Position and align the marks on the upper intermediate steering shaft and the steering

column.

10. Install the upper intermediate steering shaft (3) to the steering column.

11. Install the steering shaft coupling bolt (2) and nut (1) to the upper intermediate steering

shaft.

Tighten: Tighten the bolt/nut to 50 N.m (37 lb ft).

Fig. 16: View Of Spark Plug Wires
Courtesy of GENERAL MOTORS CORP.

12. Install the spark plug wires to the spark plugs.

13. Install the spark plug wires to the ignition coils.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Exhaust - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado