GM Service Manual Online
For 1990-2009 cars only

    Object Number: 12517  Size: SH
  1. Inspect the shift forks, the shafts, and the levers for wear or damage. Replace these if the conditions exist.
  2. Measure the shift fork pad thickness. Replace the shift fork pad if the pad is thinner than the following specifications:
  3. • Reverse--7.4 mm (0.291 in)
    • Except reverse--7.5 mm (0.295 in)