2007 GMC Sierra 3500 Duramax diesel crew cab 4x4

this is a one owner vehicle . nbsp;I bought this pickup new in 2008 and all the miles are highway miles . it has never been on dirt roads. it has had regular oil changes at which time all filters were changed . il . uel. air. and transmission. the engine is a 6. 6 Duramax diesel that doesn't use any oil and runs strong with plenty of power and a 6 speed Allison transmission that's shifts smooth. I have spoken to various GMC dealers and they tell me that 221000 miles is nothing for these engines as they regulary see them running strong at 500. 00 to 750. 00 miles and more . they are absolutely awesome engines. the tires are new and it has a spray on bed liner. the paint is in great shape and the interior is in excellent condition. very clean. the reason I am selling it is because I am retired and I have a new one and I don't need two pickups. if you have any questions contact me and I will answer as soon as I can. thanks