HomeAll RepliesRe: Chevy MyLink and ATT data plan Re: Chevy MyLink and ATT data plan Sponsored November 14, 2012 at 9:29 pm #40788 Alex LuftKeymaster Yupp, you’re “grandfathered” into the unlimited plan so long as you don’t change your plan or “violate” ATT’s terms. @mike5335 Should have a reply from ATT and/or GM tomorrow or Friday. Stay tuned 🙂 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