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 ...

Manual Fold and Tumble Feature
Folding and Tumbling the Seat To fold and tumble the seat: 1. Make sure that there is nothing under, in front of, or on the seat. Notice: Folding a rear seat with the safety belts still fastened ma ...

Under the Hood
A 4.6-liter Northstar V-8 with variable valve timing produces 320 horsepower at 6,400 rpm and 310 pounds-feet of torque at 4,400 rpm. Premium fuel is recommended. The five-speed-automatic transmis ...