GM Service Manual Online
For 1990-2009 cars only

Important: 

   • Perform steering gear adjustments only as corrections. Do not perform steering gear adjustments as periodic adjustments.
   • Before performing any adjustments, refer to the appropriate diagnostic table.
   • Do not adjust the steering gear while the gear is in the vehicle.

  1. Adjust the worm thrust bearing preload.
  2. Adjust the pitman shaft over-center preload.