GM Service Manual Online
For 1990-2009 cars only

    Object Number: 2017784  Size: SH
  1. Remove the bolt (1) and camshaft position sensor.

  2. Object Number: 2017785  Size: SH

    Note: The camshaft timing oil control valve may be damaged when loosening the cylinder head bolt if the camshaft timing oil control valve is not removed.

  3. Remove the bolt (1) and camshaft timing oil control valve from the cylinder head.

  4. Object Number: 2017622  Size: SH
  5. Loosen the 2 bolts (1, 2) and remove the idler pulley.

  6. Object Number: 2017627  Size: SH
  7. Set No. 1 cylinder to TDC/compression.
  8. • Turn the crankshaft pulley until the groove (3) and the timing mark 0 on the timing chain cover are aligned.
    • Check that each timing mark (2) on the camshaft timing gear and sprocket is aligned with the timing marks located on the camshaft bearing caps (1) as shown in the illustration. If not, turn the crankshaft by 1 revolution (360°) to align the timing marks as above.
  9. Remove the crankshaft pulley.

  10. Object Number: 2017631  Size: SH
  11. Remove the 3 bolts (1, 2, 3) and transverse engine mounting bracket.

  12. Object Number: 2017633  Size: SH
  13. Remove the bolt (1), nut (2) and V-ribbed belt tensioner assembly.
  14. Remove the crankshaft position sensor.

  15. Object Number: 2014135  Size: SH
  16. Using an E10 TORX® socket, remove the stud bolt for the V-ribbed belt tensioner.
  17. Remove the 12 bolts (3-14) and 2 nuts (1, 2).

  18. Object Number: 2014140  Size: SH

    Note: Tape the screwdriver tip before use.

  19. Remove the timing chain cover by prying the portions between the timing chain cover, cylinder head and cylinder block with a screwdriver.