I have a Serv 4WD message on my Instrument cluster. I read a post by a member saying it was maybe caused by a sensor on the transfer case. His truck is a 15 I believe, mine is an 09. I don't find a sensor on my transfer case. Suggestions please.
Theres a few different things that can cause a service 4wd light on this truck the three main components to check out are the shift motor on the side of the transfer case, there is a front differential actuator and of course the switch in the cab. there is also the possibility of the transfer case control module which can go bad but the first three things i listed are the most common. It would be a good idea to get the codes pulled to narrow it down. And make sure the front diff and t-case have fluid lol. Hope this helps