GM does not lease HD vehicles, so there are ZERO 2500HD/3500HD pickup trucks "coming off a two or three year lease that are well maintained and have significant life left with a 40% discount from new."
There is no such thing.
Good used 2500HD/3500HD GM pickups are far and few between, and you will pay almost new price for a 2-year-old used truck with average miles. I've been helping my Dad shop for the last two years to replace is REALLY long-in-the-tooth 2000 Chevy 2500, and this is what we've been finding.
Every once in a while you'll come across one that for no apparent reason is priced about $5000 less than anything comparable, but by the time you get on the phone to the dealership, it's gone, or there's some lame excuse why it's not on the lot when you get there.
If you're going to buy and you don't want to spend months on a wild goose chase, spend the little extra and buy new.
