2014 Buick LaCrosse Owner Manual - Page 222

9-44 Driving and Operating ACC Automatically Disengages ACC may automatically disengage and the driver will need to manually apply the brakes to slow the vehicle when: . . lights will come on. The automatic braking may feel or sound different than if the brakes were applied manually. This is normal. Stationary or Very Slow-Moving Objects The sensors are blocked. The traction control system (TCS) or electronic stability control system has activated or been disabled. No traffic or other objects are being detected. There is a fault in the system. { Warning Adaptive Cruise Control (ACC) may not detect and react to stopped or slow-moving vehicles ahead of you. For example, the system may not brake for a vehicle that it has never detected moving. This can occur in stop-and-go traffic or when a vehicle suddenly appears due to a vehicle ahead changing lanes. Your vehicle may not stop and could cause a crash. Use caution when using ACC. Your complete attention is always required while driving and you should be ready to take action and apply the brakes. . If the stopped vehicle ahead has driven away and ACC has not resumed, the vehicle ahead symbol will flash as a reminder to check traffic ahead before proceeding. In addition, the left and right sides of the Safety Alert Seat will pulse three times, or three beeps will sound. See "Alert Type" and "Go Notifier" in "Collision/Detection Systems" under Vehicle Personalization on page 5-43. When the vehicle ahead drives away, press RES+ or the accelerator pedal to resume cruise control. If stopped for more than two minutes or if the driver door is opened and the driver safety belt is unbuckled, the ACC automatically applies the electric parking brake to hold the vehicle. The electric parking brake status light will turn on. See Parking Brake on page 9-32. To resume ACC and release the electric parking brake, press the accelerator pedal . ACC . A message will appear on the DIC indicating that cruise is disengaging. The ACC active symbol will not be displayed when ACC is no longer active. Notification to Resume ACC ACC will maintain a follow gap behind a detected vehicle and slow your vehicle to a stop behind that vehicle.