After taking the Truck out of storage I have the following problem. 4WD can not be engaged anymore and message in cluster reads "serv 4wd".LEDs in selector switch are not illuminated anymore. I checked all fuses and they are o.k. Is it possible to readout fault codes and how can I do this or do I have to see a Dealer ? Anything I can check -look for??? Thanks for your help

 

you might get better help if you post this up in the CTD section. A lot of those guys there really know what they are talking about, and have much more experience with the 3500's than most of us in here.