GM Service Manual Online
For 1990-2009 cars only
  1. Lower the park brake lever.
  2. Raise the park brake lever.
  3. Lift the park brake lever boot to gain access to the multiplier lever at the front of the park brake lever assembly.
  4. Pivot the multiplier lever up and down 3 times.
  5. Cycle the park brake lever up and down three times for auto adjustment.
  6. Lower the park brake lever boot.