Quote Originally Posted by Ellwein Engines View Post
Cougar281 thanks for that info. Please tell me...what passthru device did you use (Tech2?) and how did you select the programming? Did you insert a 2013 CTS VIN in the lookup?
I am contemplating going this route but I need to buy a J2534 passthru and then the $55 3 day subscription.
I used my Tech2 w/CANDi module and no, didn't have to use a different VIN. I just selected the radio for reprogramming and when it asked what calibration to flash, I told it the one with the camera. I'm not sure of the current address, but calid.GM.com used to allow you to enter your VIN and see what calibrations are options for the modules under your VIN.

It was similar when I reprogrammed the original headunit in my truck from 'premium' to LUX for the LUX amplifier.