tony27,
You don't have a dual rear wheel 3500 series do you?
If so, the 2007-2014 3500 (5 series) wheels will fit, but you need to get a set of the later
captive/extended washer lug nuts.
I guess you could say if you have lug BOLTS the wheels will not fit.
If you have dual rear wheels and lug NUTS...they should fit just fine.
Roger