GM Astro/Safari 1985-1996 Repair Guide



The cruise control system is a speed control system which maintains a desired vehicle speed under normal driving conditions. However, steep grades up or down may cause variations in the selected speed.

The main components of the cruise control system are the mode control switches, controller (module), servo unit, speed sensor, vacuum supply, electrical and vacuum release switches.

To release the system, 2 release switches are provided. An electrical release switch is mounted on the brake pedal bracket and clutch pedal bracket on the vehicles equipped with manual transmissions. A vacuum release valve is mounted on the brake pedal bracket. The valve vents the trapped vacuum in the servo when the brake pedal is depressed, allowing the servo to return the throttle to idle position.

The 1995-96 models use an all electric system. There are no vacuum systems used.