TrailBlazer 2WD V8-5.3L (2007)
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 N.m (18 lb ft).
11. Install the valve lifters. Refer to Valve Lifter Replacement.
12. Install the condenser. Refer to Condenser Replacement.