Vehicles with a yellow fuel cap can use either unleaded gasoline or ethanol fuel containingup to 85% ethanol (E85). SeeE85 or FlexFuel. For all other vehicles, use only the unleaded gasoline described underRecommended Fuel.
OnStar Additional Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
Prior to vehicle purchase.
Press to set up an account.
With the OnStar Basic Plan,
every 60 days.
After change in ownership and
at 90 days.
Transferring Service
Pres ...