http://www.tfltruck.com/2015/08/banks-gets-over-500-lb-ft-of-torque-from-3-0l-v6-ecodiesel-preview/
They went from 240 HP (STOCK) to 302 HP with the Banks Automind ECU tuner.
Not bad, and of course Banks is one of the most emission friendly tuning companies out there.
Looking good. Me and a buddy use to go out and fish all the time in a boat very similar to yours. We had fun.. what we like to call the "good old days".
I've read a few other members with the exact same problem. Edge will need to put out a software upgrade to the CTS, I'm not sure if they've done it yet.
Yea, it seems to be more common lately. From what I'm reading, they don't have a fix yet right? They keep flushing the coolant tanks and not really finding the root cause of the problem.
They make a DO NOT FLASH OBD cover you can put over the factory plug.. it means no guarantee but it's better than nothing.
Besides instructing your dealer not to flash I'm not sure what else you can do.