Emergency
With Automatic Crash Response, the built-in system can automatically connect to help in a crash even if you cannot ask for it.
Push 
to connect to an Emergency
Advisor. GPS technology is used to identify the vehicle location and can provide
critical information to emergency personnel. The Advisor is also trained to offer
critical assistance in emergency situations.
See also:
Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NHTSA) in addi ...
Customer Assistance for Text Telephone (TTY) Users
To assist customers who are deaf, hard of hearing, or speech-impaired and who
use Text Telephones (TTYs), Buick has TTY equipment available at its Customer Assistance
Center. Any TTY user can comm ...
OnStar®
For vehicles with an active OnStar subscription, OnStar uses several innovative technologies and live Advisors to provide a wide range of safety, security, navigation, diagnostics, and calling servi ...