If you were thinking about buying one of General Motors’(s gm) new-fangled 4G cars this summer but were wondering how much that LTE connectivity would cost you, then GM and AT&T(s t) today provided an answer. The bottom line: You can get a link to the internet for as little as $5 to $10 a month, but if you plan to consume any reasonable amount of data on that 4G connection, you’ll have to pony up a lot more.

On Monday GM announced three tiers of data pricing for 30 Chevrolet, Buick, Cadillac and GMC cars debuting this year with LTE radios, starting with the 2015 Chevy Malibu next month. The best option is for current AT&T customers (or drivers willing to become AT&T customers for the sake of their vehicles) on its Mobile Share plans. AT&T is treating GM automobiles much like a tablet: You pay $10…