K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
5. install the camshaft retainer and bolts.
Tighten the bolts to 25 Nm (18 ft. lbs.).
6. Install the camshaft sprocket and position the timing chain.
7. Install the camshaft sprocket bolts.
Tighten the bolts to 35 Nm (26 ft. lbs.).
8. Inspect the camshaft sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be reused.
9. Lubricate the O-ring seal with clean engine oil.
10. Install the camshaft sensor and bolt.
Tighten the bolt to 25 Nm (18 ft. lbs.).
11. Install the valve lifters.
12. Install the front cover.