Quote Originally Posted by I800C0LLECT View Post
After looking at the situation, if your grand prix really is devised with 10' of 8awg to the battery that could be the potential problem. That's tough to swallow though. I have OEM wires hooked up to my system and it was cranked out today without any issues. I'm running 4awg to the back powering two amps. Perhaps Matt has a point with the possibility that your alternator is suffering from reduced output. It does happen over time.

I guess an easy way to test that is by a big 3 upgrade. But remember, this isn't a fix all. It's a case by case basis. Also, be sure that you're power connections are all tightened down properly and that there is a secure ground point with plenty of surface area touching the frame/metal.
Said 10' for the alt to the starter.... then it would have to go from the starter to the battery, another good 3' proably. I will just try the alt to fuse box wire, if it don't help ill take it off and just wait till something gives out. Always a good reason to buy new goodies