GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1530240  Size: SH
  1. Inspect the timing chain sprockets for cracks or teeth that are worn, broken, or chipped.
  2. Inspect the timing chain for binding or stretching.
  3. Inspect the dowel pins for wear or damage
  4. Inspect the crankshaft sprocket keyway and the locating dowel pins in the crankshaft for damage.
  5. Inspect the timing chain shoe and guide for excessive wear or cracks.
  6. Inspect the timing chain tensioner for damage.
  7. Replace the timing chain and sprockets if damaged.