:grrrrrr:I know its a common issue with GM vehicles. I just installed 2 10" subs and a 400W amp in my 07 silverado, and im seeing the lights on my dash and my headlights flicker more than ever!.. its always done it, even with the factory setup, or even when i roll my window down etc... i was just wandering if theres any actualy remedies for this? some kind of in-line regulators or somthing to make it stop?.. its driving me crazy, i feel like im in a club going down the street! they flicker to the point of almost strobing. what all can be done to lessen or stop this completely?!.. i had this same setup in my nissan altima, and then my 350Z and none of the lights ever flickered. I didnt think a small 400w amp would make it so bad.