My wife reminded me we will get a email from Onstar and XM after 2 months letting us know the 3 month trial will end in one month.OnStar has our credit card number so I need to remember to cancel the 3 month plan that has a bunch of extra stuff we don't need and continue on with the free 8 year Basic plan.
There is also 3 months of XM. If you're not interested in XM I'm guessing you can say no to that when getting things setup.