GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 5825-A Crankshaft Gear Remover


    Object Number: 480541  Size: SH
  1. Remove the crankshaft position sensor reluctor ring.

  2. Object Number: 480542  Size: SH
  3. Check the camshaft timing chain free play.
  4. 2.1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
    2.2. Measure the free play on the slack side (3) of the camshaft timing chain.

    If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in), replacement of the camshaft timing chain and the sprockets is recommended during assembly.


    Object Number: 480544  Size: SH
  5. Remove the camshaft sprocket bolts.

  6. Object Number: 480546  Size: SH
  7. Remove the camshaft sprocket and the camshaft timing chain.

  8. Object Number: 480547  Size: SH

    Caution: Wear safety glasses in order to avoid eye damage.

  9. Remove the crankshaft sprocket using the J 5825-A .

  10. Object Number: 387761  Size: SH
  11. Remove the crankshaft balancer key.