HomeAll RepliesRe: Does gm buy very high mileage vehicles back Re: Does gm buy very high mileage vehicles back Sponsored December 5, 2012 at 12:40 am #40892 CactusParticipant 250k is not “very high mileage” when it comes to GM cam-in-block engines. Props to keeping the original trans going though. 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