I purchased a new 2007 Chevrolet HD2500 with the Duramax diesel engine to pull my RV. The truck pulled great, however, it broke down in transit SIX times in 34 months. Each repair was followed by the technician’s assurance that the truck was fine. After leaving me and my family stranded on the roadside for the last time, I traded this on a 2010 Chevrolet HD2500 with the Vortec V8 engine. This truck is rated by the manufacturer to tow 12, 300 lbs. My RV weighs less than 10, 000 lbs., however, this truck is completely incapable of maintaining safe highway speeds while towing. GM technicians have once again assured me that the truck is fine, however, it simply cannot pull the required load effectively and GM does not intend to help any longer. This is nothing short of misrepresentation. After spending a great deal of money and being a loyal GM customer, I am left with a truck that cannot safely tow my RV.