Duramax 6.6L V8 Turbodiesel Allison 1000 6-Speed Automatic 4WD.Summit White 2006 GMC Sierra 2500HD SLT 4D Crew Cab Duramax 6.6L V8 Turbodiesel Allison 1000 6-Speed Automatic 4WDWelcome to Conquest Classic Cars. We offer pre-owned luxury classics exotic and collectible automobiles as well as Jeeps trucks and SUV. Our service department can handle all makes and models with specialty technicians for Porsche European Makes and Domestic brands such as Ford Chevrolet and Chrysler / Dodge. We have full restoration capabilities as well as partial restoration services. Additionally we also have full in-house body and paint department. We also offer retail service on nearly every make and model of car and truck. We are the one stop shop in Northern Colorado for your automotive needs classic or modern. Be sure to visit our virtual showroom of inventory available for purchase. There you will see detailed information about each vehicle a picture gallery as well as convenient ways to contact us for more information about that vehicle. We are located at 3805 W 10th St and are available by phone at 970-573-5291 . You can also get driving directions and hours of service from our user friendly website.Check out our Reviews ***** Jason Mounce I can''t say enough about the help and experience my wife and I had with Conquest Classic Cars on the purchase of a 1971 Chevrolet Chevelle! My wife and I had been looking for a muscle car for her and she fell in love with one about six months ago. It was on the First Choice Motors lot at the time and before we could make any moves on the car the owner was arrested the lot shut down and the car lost to the court and banking system. With the help of Garrett and Ryan along with the rest of the Conquest team we were able to track down the car and acquire it at a fair and equitable price. They went above and beyond to help us find my wife''s dream car. If you''re looking for a specialty car these guys can find it for you!