I just bought a 2012 GMC 3500 Denali dually yesterday, and it has 19.5 inch commercial tires (I think the wheels are semi wheels, according to the folks on the duramax forums). They believe (the duramax folks) that this will be a big issue towing a keystone fuzion 342 fifth wheel due to the higher bed height. I dread buying wheels and tires after just buying a truck, but will do what I need to do. I don't have the trailer yet, supposed to be picking it up in a week or two (need to get a hitch installed first). I'm hoping the truck isn't lifted (I'm a girl lol, and my husband is not a car/truck guy, so need to get someone to help me out here!)on top of things - doesn't appear to be, but what do I know.
So, thoughts on this? I need to measure the bed more accurately - but my rough estimate was that it was 55-57 inches high, ground to the top of the bed rails. What does a normal 2012 denali with the stock 17 inch tires sit at? I've read that most 5th wheels sit at 58-60 and if that's true, and my measurements are close, I'm not going to have enough clearance to sit level with 6 inches between.
These make the truck look higher in the back, but it really does sit level front to rear - the tonneau cover is deceiving.
Can't seem to get them to load properly from photobucket...
http://s285.photobucket.com/user/spt...56216630939634
http://s285.photobucket.com/user/spt...28198220507674
Also posted on RV Forums....