GM Service Manual Online
For 1990-2009 cars only

The lever must be free from corrosion and lubricated for correct operation. The lever must be returned to the released position without sticking or binding. If a problem is present, check the cable routing for binding or misadjusted cables.

The cable tension is self adjusting. However, during normal brake lining wear, it is possible that the cable tension may need adjustment do to the increased lever travel. If adjustment is required, complete the following steps:

  1. Check the rear brake shoe for wear. The rear brake shoe thickness should not be more than 80 percent worn (approximately). If wear is present, refer to Brake Shoe Inspection Rear Brake Shoe Inspection in Drum Brakes.
  2. Make sure the park brake system is free from corrosion and free from sticking or binding.