[Tomko]

Sensors are prone to corrosion at the connector. Especially in winter climates. Possibly also by high pressure car washes that spray up under the vehicle.

 

[EricSmit]

You mean the blind zone monitoring? Could just be you don't have a car in your blind spot, as determined by the car.

 

[MP81]

Sensors are prone to corrosion at the connector. Especially in winter climates. Possibly also by high pressure car washes that spray up under the vehicle.

Definitely this.

 

[TheRealHip]

I'll check for corrosion. Sometimes a car will be there and light doesn't come on...

 

[Blasirl]

lane change lights on the mirrors

As a side note - I've seen these on overseas Cruze's.