2007 Chevy Silverado HD Duramax,Diesel Allison Transmission

I have a son in law with a 6.0 l Ford who has 500,000 miles on his truck. It is on its second engine but it still seems like a very good reliable truck. He bought it off his father 5 years ago and I'm not aware of a single problem that he has had in the last 5 years. If you can't afford to pay cash for a new truck I think you should run what you have. The 2007 Duramax is a pretty good truck.