01 Duramax 1 ton do have a few problems happening to it transmission value body pulled out to be worked on in the past acting up again. Some electrical problems. We all know about the injectors that year model has always had problems 41,000 miles on all eight of them and now have to replace two of them. the only thing I have is a PPE programer for towing my horse trailer. Its a great truck and love it. at least its paid off I would love to have newer one but not ready to pay anymore payments on it!! Maybe I could get some help from you guys where I will do it my self on some things.