TrailBlazer 4WD L6-4.2L VIN S (2002)
20. Remove the J 44221.
21. The dark lines (1) on the chain should be aligned with the marks on the sprockets as shown.
22. Install the top chain guide.
23. Add Threadlock GM P/N 12345496 on the top chain guide bolt threads.
24. Install the top chain guide bolts.
^
Tighten the top chain guide bolts to 10 Nm (89 ft. lbs.).
25. Install the engine front cover.
26. Install the camshaft cover.
