GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 5825-A Crankshaft Gear Remover


    Object Number: 45986  Size: SH
  1. Remove the crankshaft position sensor reluctor ring.

  2. Object Number: 341358  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 in excess of 11 mm (0.43 in), replacement of the camshaft timing chain and the sprockets is recommended during assembly.


    Object Number: 330581  Size: SH
  5. Remove the camshaft sprocket bolts.

  6. Object Number: 330584  Size: SH
  7. Remove the camshaft sprocket and the camshaft timing chain.

  8. Object Number: 11506  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.