I am looking at purchasing 5th wheel vs a Class A DP. Need to TOW vehicle. I talked with my mechanic about the Ford F350 diesel and he said although he is a Form man he would not buy one. He told me to go with the GMC 3500. HE said that they are having a lot of problems with the F350. He said he is not sure if the newer ones are fixed but wouldn’t take a chance until they have a proven track record. How about some of you that owns either. Can you help me with some info? Thanks