TrailBlazer 2WD L6-4.2L VIN S (2003)
5. Remove the top chain guide bolts.
6. Remove the top chain guide.
7. Remove the exhaust camshaft position actuator bolt.
8. Remove the exhaust camshaft position actuator.
9. Remove the intake camshaft sprocket bolt.
10. Remove the intake camshaft sprocket.
11. Remove the timing chain.
12. Remove the crankshaft sprocket.
13. Remove the cylinder head access hole plugs.
