well, i didn't keep my stock deck, n i had my rear speakers replaced, so i too get a LOT of boom w/o a sub =) But anyway, i also got a lot of rear break light rattling, so i know it sounds ghetto, but just shove a folded piece of paper or sumthin thick enough to jam under the light. this keeps it in place so no more rattling can occur. hey, it's not the fanciest thing to do, but it'll do the job quite well