I just replaced the transmission fluid ,pan and the connector. After about three days i see the hdc fault message then the suspension lowering and trans fault limiting it to 1 gear. i pulled the codes u0126 ,u0167 and i cleared it then i got u0167,u0126,u0121,p0504,u0155. I replaced the Battery and the stoplight switch. it also seems that the codes don't show up unless the truck is warm. The last set of codes i got was u0167,u0126,u0121,p0504,u0155,u0073,u0151,u0101. Does anyone know what i am looking at here? I am totally lost. The truck has 144000 miles on it.