GM Service Manual Online
For 1990-2009 cars only

The RESUME/ACCEL switch controls three functions.

Resume Function

If the cruise system has been disengaged by depressing the brake pedal, it may be reactivated by momentarily holding the RESUME/ACCEL switch. 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 cruise ON/OFF switch or the ignition switch has been cycled since the last time the cruise system was active or the vehicle speed is below 40 km/h (25 mph).

Accelerate Function

By sliding the RESUME/ACCEL switch and holding it, the vehicle will accelerate until the switch is released. The cruise ON/OFF switch must be ON and the vehicle speed must be above 40 km/h (25 mph) for this function to operate.

"Tap Up" Function

In order for this function to operate, the cruise must be engaged and operating. "Tapping up" means quickly pressing the slide switch toward the R/A position and releasing it, or "tapping" the lever. Do not hold the lever in the R/A position or the system will revert to the ACCEL mode. "Tap up" is a function in which the cruise speed can be increased by 1.6 km/h (1 mph) increments (one tap = 1 mph increase).