GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412167  Size: SH
  1. Remove the upper timing chain guide bolts.
  2. Remove the upper timing chain guide.

  3. Object Number: 412158  Size: SH

    Important: The timing chain tensioner must be removed to unload chain tension before the timing chain is removed.

  4. Remove the timing chain tensioner plunger.

  5. Object Number: 412168  Size: SH
  6. Locate hex on the exhaust camshaft and hold with a wrench.
  7. Remove the exhaust camshaft bolt and the exhaust camshaft sprocket.
  8. Discard the bolt.


    Object Number: 412160  Size: SH
  9. Remove the adjustable timing chain guide bolt.
  10. Remove the adjustable timing chain guide.

  11. Object Number: 412164  Size: SH
  12. Remove the plug to gain access to the fixed timing chain guide bolt.

  13. Object Number: 412165  Size: SH
  14. Remove the fixed timing chain guide bolts.
  15. Remove the fixed timing chain guide.

  16. Object Number: 412169  Size: SH
  17. Locate hex on the intake camshaft and hold with a wrench.
  18. Remove the intake camshaft sprocket bolt, the intake camshaft sprocket and the timing chain through the top of the cylinder head.
  19. Discard the bolt.


    Object Number: 467381  Size: SH
  20. Remove the crankshaft sprocket.

  21. Object Number: 412200  Size: SH
  22. Remove the oil nozzle and bolt.