Quote Originally Posted by Bogers04SS View Post
The dealer case learn they do will erase your PMC tune (either canned or dyno) and resets the PCM setting back to the factory settings. Making your $100-$500 tune a waste of money. If you know someone at a dealership or some one who has a GM Tech II, then they might be able to bypass some of the settings and keep your tune as is.
Exactly what my dealership told me, they won't let my car leave their shop with a non-factory setting ECM - sure it's all about liability and procedure being they represent GM. I'm having trouble finding a local shop that can do it......onto the next one!