GM Service Manual Online
For 1990-2009 cars only

The electronic cruise control is a speed control system which maintains a desired vehicle speed under normal driving conditions. Steep grades or inclines may cause variations in the selected speeds.

The cruise control system has the following capabilities:

    • To cruise
    • To coast
    • To resume speed
    • To accelerate and decelerate

The cruise control system contains the following components:

    • The cruise control switches
    • The cruise control module assembly
    • The cruise control brake switch
    • The brake switch

The cruise control system uses a cruise control module assembly in order to obtain the desired vehicle cruise operation. The module assembly consists of the following components:

    • An electronic controller
    • An electric stepper motor

The controller performs the following functions:

    • Monitors the vehicle speed
    • Operates the electronic stepper motor

This motor moves the band and the cruise control cable in response to the controller. These activities allow the desired cruise speed to be maintained.

The cruise control module assembly contains a low speed limit that will prevent system engagement below a minimum speed of 40 km/h (25 mph).

The functional control switches are located on the steering wheel. The functional control switches control the operation of the controller.

A cruise control brake switch disengages the cruise system by means of the brake pedal. The switch is mounted on the brake pedal bracket assembly.

When the brake pedal is depressed, the following actions occur:

    • The cruise control system electronically disengages.
    • The throttle returns to the idle position.