GM Service Manual Online
For 1990-2009 cars only

    Object Number: 412201  Size: SH
  1. Remove the balance shaft drive chain tensioner.

  2. Object Number: 412413  Size: SH
  3. Remove the adjustable balance shaft chain guide.

  4. Object Number: 412414  Size: SH
  5. Remove the small balance shaft drive chain guide.

  6. Object Number: 412415  Size: SH
  7. Remove the upper balance shaft drive chain guide.

  8. Object Number: 412417  Size: SH

    Important: It may ease removal of the balance shaft drive chain to get all of the slack in the chain between the crankshaft and water pump sprockets.

  9. Remove the balance shaft drive chain.
  10. Remove the balance shaft drive sprocket.