Does anyone know how to interface with the databus of a 2003 Escalade? When I arm my Viper 791xv remote start / alarm I want to fold in the power mirrors, close the sunroof and windows. And when disarming move the mirrors back. Also, use the aux option to turn on rear defog and aux 2 to power up the radio. The only interface that I have seen is GMDL 4 which only deals with the door locks and security system. Does anyone know to interface with the databus and what codes would have to be given?