GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1224548  Size: SH
  1. Adjust the valve timing.
  2. Loosen the bolt and remove the timing belt pulley (1). In loosening the bolt, use the driver (2) in the picture as shown.

  3. Object Number: 1224549  Size: SH
  4. Remove the oil level gage guide tube (2) and the timing belt front lower cover (1).

  5. Object Number: 1224547  Size: SH
  6. Remove the timing belt tensioner (2) and the timing belt (1).

  7. Object Number: 1224550  Size: SH
  8. Using the bolt, turn the crankshaft clockwise to align the mark (4) on the crankshaft sprocket with the pointer (3) on the oil pump housing. Then, turn the camshaft to align the notch (1) with the pointer (2).

  9. Object Number: 1222972  Size: SH

    Important: Do not tighten the tensioner bolt completely.

  10. Install the timing belt (1) and the tensioner (2).
  11. Notice: Refer to Fastener Notice in the Preface section.

  12. Turn the crankshaft twice clockwise. Align the mark (3) with the pointer (4) and tighten the tensioner bolt.
  13. Tighten
    Tighten the tensioner bolt to 19 N·m (14 lb ft).

  14. Install all removed parts.