See also:

Delayed Locking
When this feature is enabled and the doors are locked with the power lock switch on the instrument panel or front door panels, three chimes sound to signal that the delayed locking feature is in use ...

Shocks and Struts
Shocks and struts help aid in control for a smoother ride. - Signs of wear may include steering wheel vibration, bounce/sway while braking, longer stopping distance, or uneven tire wear. - ...

Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block, and Roadside Assistance, if the vehicle is equipped with these services. OnStar can unlock the vehicle doors r ...