HomeAll RepliesRe: Chevy MyLink and ATT data plan Re: Chevy MyLink and ATT data plan Sponsored November 19, 2012 at 7:52 pm #40812 mike5335Participant I talked with both GM and ATT before posting here. And you are correct about the data usage going up. I’m hoping for a reply from Alex (see his post of Nov 14). Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored