A little shy of 46,000. I got it with 18,117 I believe in September of 2008 but didn't get to drive it untill October of 2008 due to the shipping company hitting a sign with it while it was on its way from Michigan to New York. Almost 28,000 miles in a year isn't too bad.
165,000 on my 2012 one ton dually LTZ. No deletes, fully stock since new, except added a Wherli FPR screen. Have replaced DEF tank (heater failure) under warranty, and two glow plugs. Running Rotella synthetic engine oil and Diesel Kleen lubricity enhancer. 90% of miles are highway, often towing 5th wheel or carrying truck camper. Am monitoring engine oil and transmission fluid via Blackstone Labs.