Emergency
Emergency services require an active safety and security plan. With Automatic Crash Response, built-in sensors can automatically alert a specially trained OnStar Advisor who immediately connects to the vehicle to help.
Press
for priority connection to an OnStar Advisor, who can contact emergency services, direct them to your exact location, and relay important information.
With OnStar Crisis Assist, specially trained advisors are available 24 hours a day, 7 days a week, to provide a central point of contact, assistance, and information during a crisis.
For roadside assistance, advisors can locate the nearest service provider to help with a flat tire, battery jump start, or empty fuel tank.
Test yourself
A quick GMC Terrain quiz: every answer comes with an explanation and a link to the manual page.