so i have a guy at work that is trading his GMC in on a 2005 SS truck. he has been going on and on and on about the 405HP that the truck has. now in all the internet searching i have been doing the most i can find that they have factory is 345-350 bone stock (which the one he is getting is) so i am hoping that you guys can shed some light on the SS trucks as far as what power they have stock as well as what it would take to get to 405HP aftermarket.
thanks in advance for your help...