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Home >> GMC >> 1990 >> Forward Control 3.9 L >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control System - Vacuum Servo >> Description & Operation >> Control Switch Operation >> Resume/Accel

Control Switch Operation: Resume/Accel

To resume set speed after system has been disengaged by braking, momentarily engage and release RESUME/ACCEL switch. Vehicle will return to set speed. If RESUME/ACCEL switch is engaged for more than one second, vehicle will begin to accelerate. To accelerate using cruise control system, engage and hold RESUME/ACCEL switch until desired speed is reached.

To increase speed by one MPH increments during engaged cruise, tap RESUME/ACCEL switch (quickly move to RESUME/ACCEL position and release). Vehicle speed will increase one MPH for each tap of the switch. After 10 taps, system must be reset to a new speed to continue this function.