"170K ON IT. THE ALTERNATOR DID FAIL AT 160K BUT NO OTHER PROBLEMS BEFORE OR AFTER. LOTS OF TOWING AND THERE IS NO LACK OF POWER. MY OTHER GMC HAD 240K WHEN I SOLD IT AND IS STILL RUNNING FINE. I BET YOU CAN GET 300K OUT OF THESE TRUCKS WITH PROPER MAINTENANCE."
"This truck has been the strongest truck I have ever owned. I can tow my motorcycles without any issues or my friends camper. The best part is almost 20 MPG on average with the Duramax diesel in it! If you can find one with under 100K miles, buy it. It was last 10x longer. The body is doing a great job of holding up even with Chicago winters, too.
The only reason I gave 4 stars instead of 5 on reliability was one time the truck died on the highway and would not start up. It went to the shop and no problems could be found because it started up the next day and hasn't had a problem since. That was two years ago."
"Best truck I have owned, not as stylish or comfortable as my last Ford 250, but way more realiable and powerful. Do yourself a favor and pony up the extra money for the diesel and allison tranny. It' more than worth it"