I have a GDS. Big problem accessing information on 2004 Cadillac DTS. Oddly enough, it is the second one in the course of a week. I am able to read codes. I am also able to run HVAC Module Calibrations (Only thing I really did on one of them). However. I am unable to retrieve any data values on any Body Module...
I bought a preowned Launch GDS x431 and it can only scan up to 2012, but i want to update it to 2014 or 2015. The subscription has expired that the previous owner had. I need help.