GM Service Manual Online
For 1990-2009 cars only

OFF-ON-R/A Switch

    • The OFF-ON-R/A (Resume/Accelerate) slide switch is located on the multifunction switch.
    • The OFF-ON-R/A (Resume/Accelerate) slide switch controls the following 4 functions:
       - The OFF/ON function
       - The resume function
       - The accelerate function
       - The tap up function

The OFF/ON Function

The cruise control system can not be engaged when the OFF-ON-R/A switch is in the OFF position.

When the cruise control switch is in the ON position, the system may be engaged at any speed above approximately 40 km/h (25 mph).

The accelerator may be depressed at any time in order to override the cruise control system.

Release of the accelerator will return to the previously set cruise speed.

The Resume Function

If the cruise control system has been disengaged by depressing the brake pedal or the clutch pedal, the system may be reactivated by momentarily sliding the OFF-ON-R/A switch to the R/A position.

This will cause the vehicle to accelerate to the previously set speed and cruise at that speed.

The resume function will not work if the OFF-ON-R/A switch has been moved to the OFF position.

The resume function will not work if the ignition switch has been cycled since the last time the cruise control was active or the vehicle speed is below the low speed lockout of 40 km/h (25 mph).

The Accelerate Function

By sliding the OFF-ON-R/A switch to the R/A position and holding the switch, the vehicle will accelerate until the switch is released.

The cruise control must be engaged and operating, and the vehicle speed must be above the low speed lockout of 40 km/h (25 mph) in order for this function to operate.

The Tap Up Function

    • In order for the tap up function to operate, the cruise control must be engaged and operating.
    • Tapping up is done by sliding the OFF-ON-R/A switch to the R/A position and immediately releasing it, or tapping the switch.
        Do not hold the switch in the R/A position or the system will revert to the accelerate mode.
    • Tap up is a function in which cruise speed may be increased by 1.6 km/h (1 mph) increments.
        One tap = 1.6 km/h (1 mph).
    • The cruise control system may not tap up beyond the vehicle's maximum speed.

Set Switch

The cruise control SET switch controls the following 3 functions:

    • The set function
    • The coast function
    • The tap down function

The Set Function

In order to set the cruise speed, perform the following steps:

The vehicle speed will be set at the particular speed of the vehicle when the switch is released.

  1. Depress and then release the SET switch.
  2. Vehicle speed must be above the low speed lockout point.

  3. Turn the OFF-ON-R/A switch to the ON position.

Cruise speed will be within approximately 1.6 km/h (1 mph) of the actual speed when engaged.

The cruise control will operate until one of the following procedures are performed:

    • The On-Off-R/A switch is moved to the OFF position.
    • The SET switch is depressed and held.

Push the brake or clutch pedal in order to disengage the system.

The set speed is maintained in memory, allowing the cruise speed to be resumed at a later time.

The Coast Function

    • Press the SET switch in order to raise or lower the vehicle speed.
    • In order to increase cruise speed, perform the following steps:
        1. Accelerate to a new speed.
        2. Depress the SET switch.

Ensure that the PCM/VCM releases the previously set speed.

        3. Release the switch.

Upon releasing the switch, a new speed is set.

    • Increasing speed may also be more easily set with the On-OFF-R/A switch as described above.
    • In order to decrease cruise speed, perform the following steps:
        1. Depress the SET switch in order to disengage the cruise control system. This will allow the throttle to return to the idle position.
        2. When the vehicle has slowed to the desired lowered cruise speed, release the switch in order to cause the system to cruise at the new speed.

The Tap Down Function

  1. In order for the tap down function to operate, the cruise control must be engaged and operating.
  2. Tapping down is done by depressing the SET switch and immediately releasing it, or tapping the switch.
  3. Do not hold the switch in the depressed position or the system will revert to the coast mode.

  4. Tap down is a function in which cruise speed may be decreased by approximately 1.6 km/h (1 mph) increments.
  5. One tap = 1.6 km/h (1 mph)

  6. The system can tap down to the low speed lockout of 40 km/h (25 mph). The cruise control will not operate below 40 km/h (25 mph).