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Hi, My name is ***** ***** for the delay.
I will do my best to assist you
what is the year of the transfer case you are using?
does that transfer case not have a speed sensor anywhere?
Hi there, I am Cam.Getting rid of the service 4wd will not be easy. Because you have the whole truck expecting the transfer case module to be there and working and it sees a problem, its providing that signal over the network. You can try clipping the dark green white wire at the transfer case module, connector 1 pin e9 and see if that makes it stop. If not then you will have to program out the auto system or change out the cluster for one that’s not expecting the 4d system there.