I posted this over in the Tahoe section, thought I might as well post it here too:

" I have an 07 LT Suburban, which I believe has the 160amp alternator. I want to run a dual alternator system for my truck because I'm about to install a hi-powered audio system in the truck. We're talking well over 4k watts. So what I want to know is how can I setup a dual 200 to 300amp alternator setup that will not kill my warranty? If there is no way to do that then is there a way I can get a 300 to 400amp single alternator that will work with the 07? "

 

If you are worried about your warranty I would have a GM dealer do the install, but I am sure that would cost an arm and a leg.