2014 Buick LaCrosse Owner Manual - Page 236

9-58 Driving and Operating 56 km/h (35 mph) or greater. If the vehicle crosses a detected lane marking without using the turn signal, this indicator will change to amber and flash. In addition, three beeps will sound from the left or right side, or the Safety Alert Seat will pulse three times on either the left or right side of the seat, depending on the lane departure direction. . How the System Works The LDW camera sensor is on the windshield ahead of the rearview mirror. To turn LDW on and off, press @ on the center stack. The control indicator will light when LDW is on. The windshield may be damaged. The weather may be limiting visibility. . This is normal operation; the vehicle does not need service. Clean the windshield. Lane markings may not be detected on curves, highway exit ramps, or hills; or due to poor visibility. If the LDW camera system does not seem to operate properly, cleaning the outside of the windshield in front of the camera sensor may correct the issue. When the System Does Not Seem to Work Properly When the vehicle is started, the LDW indicator on the instrument cluster will come on briefly. If LDW is on, the LDW indicator will appear green if the system detects a left or right lane marking while the vehicle is traveling at If the LDW symbol does not appear when the system is on and the vehicle is traveling at least 56 km/h (35 mph): . The lane markings on the road may not be seen. The camera sensor may be blocked by dirt, snow, or ice. .