I just bought this truck, 2013 GMC 3500 Diesel and I know its tuned and deleted. I have to use this truck to pull my race car and need to get it tuned for pulling, my question is how can I find out the tune that is in it and how do I get it set up for my needs. It seems to be more performance oriented at this time, this thing will fly unloaded but kills the trans when pulling?
Is there a way to buy a tuner and be able to switch back and forth for loaded and loaded use?