See also:

Onstar.com
The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service. Get subscription plan pricing and sign up for OnStar Vehicle ...

OnStar Mobile App
With an iPhone® or Android™-based mobile device, an OnStar mobile app can be downloaded. The vehicle can be remote started, if equipped, or the doors can be unlocked from anywhere there ...

What to Add
When you do need brake fluid, use only DOT-3 brake fluid. Use new brake fluid from a sealed container only. Always clean the brake fluid reservoir cap and the area around the cap before removing i ...