If the vehicle is on an uneven surface, the park brake may not hold the vehicle and could result in unintended vehicle movement and a vehicle crash. This condition does not affect normal service braking.
On certain straight towing or non-towing trucks equipped with bendix air brakes, the air brake park control valve may develop either an internal air leak or an air restriction. The park brake may not release or may release only partially.
Dealers will inspect and replace the external check valve on the air brake park control valve if the inspection determines the external check valve is damaged, the air brake park control valve will be replaced and may require the replacement of an internal check valve in the air brake park control valve. Remedy will be free of charge. The recall began on October 22, 2007. Owners may contact GM at 1-800-862-4389 or Isuzu at 1-800-255-6727.
