2015 Buick LaCrosse Owner Manual - Page 227

9-42 Driving and Operating Reducing Speed While ACC is at a Set Speed If ACC is already activated, do one of the following: . When the accelerator pedal is pressed, ACC will not brake because it is overridden. A warning message will appear on the Driver Information Center (DIC) and Head-Up Display (HUD). See Cruise Control Messages on page 5-36. . Selecting the Follow Distance Gap When a slower moving vehicle is detected ahead within the selected following gap, ACC will adjust the vehicle's speed and attempt to maintain the follow distance gap selected. Press 3 on the steering wheel to adjust the following gap. Each press cycles the gap button through three settings: Far, Medium, or Near. When pressed, the current gap setting displays briefly on the instrument cluster and HUD. The gap setting will be maintained until it is changed. Since each gap setting corresponds to a following time (Far, Medium, or Near), the following distance will vary based on vehicle speed. The faster the vehicle speed, the further back your vehicle will follow a vehicle detected ahead. Consider traffic and weather conditions when selecting the following gap. The Press and hold RES+ up until the desired set speed appears on the display, then release it. To increase vehicle speed in small increments, briefly press RES+. For each press, the vehicle increase to the next 5 km/h (1 mph) mark on the speedometer. Use the brake to get to the desired lower speed. Press SET- down and release the accelerator pedal. The vehicle will now cruise at the lower speed. Press and hold SET- down until the desired lower speed is reached, then release it. To decrease the vehicle speed in smaller increments, press SET− down briefly. For each press, the vehicle speed decreases to the next 5 km/h (1 mph) mark on the speedometer. . . . When it is determined that there is no vehicle ahead or the vehicle ahead is beyond the selected following gap, then the vehicle speed will increase to the set speed. The speedometer reading can be displayed in either English or metric units. See Instrument Cluster on page 5-8. The increment value used depends on the units displayed. The speedometer reading can be displayed in either English or metric units. See Instrument Cluster on page 5-8. The increment value used depends on the units displayed.