i have a '08 pontiac grand prix gxp with the 5.3l v8 and i can not figure out why every time i run my 1/0 nwire from the alt to the battery, it starts freaking out. i need help with my big three uprade as i am gearing up for my next big build.... 2 lvl 4 12's with a dc 5k. i have a xs dc power 250 alt, alot of 1/0 wire and a american bass 350.4 on my memphis m class mids and highs. if anyone knows of this car or can figure out my problem, please let me know.