TrailBlazer 4WD L6-4.2L VIN S (2002)
1. Lubricate and fill the valve lash adjusters with engine oil.
2. Install the valve lash adjusters in their original locations.
3. Lubricate the valve rocker arm roller.
4. Install the valve rocker arms in their original locations.
5. Coat the camshaft journals with engine oil.
6. Install the camshafts to their original position