I just put new subs in my car and I am getting a nasty rattle where the back speakers are located. I was wondering what other people to try to solve this problem. By the way I have a Cobalt LS, any help would be much appreciated.

 

throw towels under the rear deck in between the fabric/cardboard cover and metal

 

you should put some dynamat/towels along the very back of the rear deck lid (where its touching the window) because the deck lid slams up against the metal on the actual rear deck

im not very good at explaining things

 

do you know what exactly is rattling? because the little poppers that you pull to fold back seat that use to rattle real bad in my car until i tighten up the screws that hold them in place just to put that out there.

 

^^^ those have screws?

 

mine does. why yours doesn't? they are tiny as hell

 

yea the child car seat latch covers that flip open in the rear deck, i took those out, which helped a bit

 

yea mine kept popping up if i kept my back seats up, but i keep them down cause never have anyone back there.

 

I have a bad rattle coming from behind my seat under that big piece of trim. I am not sure how to remove it. Could somebody help me out?

 

pics of said trim?

 

its right behind the rear seat. the seat belts go right into it, also I believe the headrest is attached to it.

 

are u talking about the rear deck? in between the 2 c pillars?

 

Yes.

 

your going to need to pull it up and shove some towels/ foam under there

 

Yeah I was thinking of grabbing some dynomat stuff. But I am not sure how you take it apart.