The other day after parking the truck on a cold day - I left it in Auto 4WD - when I started it the next morning a few things came on the display, Service 4WD / Service ESC / Traction Control Disabled.
Also of note the icon showing if it is in 2WD 4HI 4LO is missing, just blank where it normally is.
I ran for codes twice and got a few different ones, the first run showed B3883 / U0102 / U0403
I cleared those codes, went for a drive and re ran it got the following, C11B3 / U0102 / U0403
I'm guessing from the above codes maybe I have a bad TCCM, is there a way to test the TCCM? Also if I buy a new TCCM and replace it myself, does it have to be programmed by a dealer after it is installed?
Thanks
Mark