I have a 2005 Grand Prix GTP, love it. I have a problem with my rear speakers, there is feedback/static coming from them, sometimes all speakers. I replaced the clock spring, replaced the headunit and amp, same issue. It is extremely loud and happens when the car is on and off, and gets extremely loud when volume is at 3/4 of highest volume. I noticed that sometimes, sometimes when I push the window up button it gets a little louder. Any ideas? I really would appreciate any/all help. All radio stuff is OEM, I do have some electrical add ons, hids hi/low, leds replaced where there was a halagon bulb, switchback blinkers, led tails. PLEASE HELP!!!
