HELP! I have a 05 vette ls-2 automatic,I have an intermittant rattle in rear of car sometimes.It will only make noise maybe once a week for a few seconds,moving or not,but worse when accelerating.sounds like exhaust is falling off but i've checked it out very thoughtly & I dont think thats it.I tried the spring trick(between hanger springs)but still rattles LOUD!Any ideas??
