I own a 2008 Chevy Cobalt Sport and the guy who i bought it from installed aftermarket headlights and taillights. He also installed some underglow (but for the inside not out) not sure how it's called. Anyway, I've been having problems with the taillights, when I'm not pressing the brake, it looks like I am and when I do it looks like if I'm not. I would have to press on it harder in order for the lights to work. Both my brother and my dad checked and said that the guy most likely messed it up because he didnt know how to install the things correctly.