OnStar

See also:

Engine Oil Life System
The engine oil life system calculates engine oil life based on vehicle use and displays a DIC message when it is necessary to change the engine oil and filter. The oil life system should be reset ...

How the System Works
The SBZA symbol lights up in the side mirrors when the system detects a vehicle in the side blind zone, indicating it may be unsafe to change lanes. Before making a lane change, check the SBZA dis ...

Ride & Handling
Our test CTS had the optional performance suspension, and the car felt as firm as one of the high-performance V-Series versions that Cadillac sells, with harsh, jarring responses over bumps. It's ...