Sierra 3500 4WD V8-6.6L DSL Turbo (2007)
7. Tighten the lock nut.
Tighten nut to 22 N.m (16 lb ft).
8. Rotate the crankshaft one revolution in order to bring the number 1 cylinder to TDC of the exhaust stroke.
9. Loosen the valve adjusting screws.
10. Insert a feeler gage between the tip of the rocker arm and the valve bridge.
11. Adjust the valve clearance to 0.3 mm (0.012 in). Refer to Valve Clearance Adjustment Specifications to determine which valves can be adjusted
when the engine is at TDC.
12. Tighten the lock nut.
Tighten nut to 22 N.m (16 lb ft).
13. Install the upper valve rocker arm covers.
