OnStar 3 Month Free Trial "3 Months On Us"
Heard this on the radio the other day, OnStar is offering 3 months free of OnStar Directions & Connections. All you have to do is push your blue OnStar button and ask the rep for '3 months on us'.
I have done this with my vehicle (yesterday) and it does work. The ad says only available with purchase of a preowned vehicle but I have had my vehicle for 1 year and previously had another free trial active on it and I was able to get this promo. When registering they don't ask for a credit card either.