GM Service Manual Online
For 1990-2009 cars only

    Object Number: 510241  Size: SH
  1. Use an appropriate tool in order to hold the timing belt pulley during disassembly.
  2. Remove the retaining bolt of the timing belt pulley from the camshaft.
  3. Remove the timing belt pulley from the camshaft.
  4. Remove the camshaft sensor from the camshaft sensor housing.
  5. Important: Before removing the camshaft housing from the cylinder head, place a shop rag under the housing in order to catch any oil.

  6. Remove the 3 camshaft sensor housing bolts and the camshaft sensor housing from the cylinder head.

  7. Object Number: 262387  Size: SH
  8. Loosen all valve adjusting screw lock nuts (2).Turn the adjusting screws back all the way to allow all rocker arms to move freely.

  9. Object Number: 262392  Size: SH
  10. Gradually remove the 12 camshaft housing bolts and the housings in the sequence that is shown.
  11. Remove the camshaft from the cylinder head.