GM Service Manual Online
For 1990-2009 cars only

    Object Number: 928342  Size: SH
  1. Remove the left secondary camshaft drive chain tensioner.
  2. Caution: Refer to Torque Reaction Against Timing Drive Chain Caution in the Preface section.


    Object Number: 1275675  Size: SH
  3. Use an open-end wrench on the hex cast into the left intake camshaft, in order to prevent the camshaft from rotating, when loosening the camshaft position actuator oil control valve on the left intake camshaft.

  4. Object Number: 1275674  Size: SH
  5. Use an open-end wrench on the hex cast into the left exhaust camshaft, in order to prevent the camshaft from rotating, when loosening the camshaft position oil actuator control valve on the left exhaust camshaft.

  6. Object Number: 928349  Size: SH
  7. Remove the left camshaft position actuator oil control valves from the left side camshafts.
  8. Slide the left camshaft position actuators off the left side camshafts.

  9. Object Number: 928352  Size: SH
  10. Remove the left secondary camshaft drive chain from the inner camshaft intermediate drive shaft sprocket teeth.
  11. Remove the left secondary camshaft drive chain from the engine.

  12. Object Number: 928355  Size: SH
  13. Remove the left secondary camshaft drive chain shoe bolt.
  14. Remove the left secondary camshaft drive chain shoe.

  15. Object Number: 928359  Size: SH
  16. Remove the left secondary camshaft drive chain guide bolt.
  17. Remove the left secondary camshaft drive chain guide.