Lane Departure Warning is a General Motors active safety technology that aims to prevent crashes by providing alerts when a vehicle begins to leave its lane and its turn signal is not activated.
The technology uses a forward-looking camera mounted behind the windshield in front of the inside rear-view mirror and works when the vehicle is in a Forward gear and driving above 35 mph (56 km/h).

Lane Departure Warning issues a flashing amber icon in the Driver Information Center (pictured) and three seat pulses when the vehicle begins to leave its lane without using its turn signal
Lane Departure Warning (LDW) provides the following feedback to the driver:
- A green LDW icon in the Driver Information Center when a left or right lane line is detected
- A flashing amber LDW icon in the Driver Information Center as well as three seat pulses on the left or right of the Safety Alert Seat (or low-pitched beeps), depending on the direction in which the vehicle is departing the lane
Turning the system or or off is accomplished via a hard switch with an LED indicator. A lit LED indicator indicates that Lane Departure Warning is ON.