i have a 2003 1500HD crew cab with a sub box and 2 10 inch subs,they pound really hard and it vibrates the hard plastic under the back window,does anybody know how to fix this?
THANKS.

on my brothers 2500hd i took off that pannel and put dinamaxx on the plastic pannel and on the metal, and it seemed to work very well

thers a ton of ways to fix little noise like that ,add dynamat to panels or even use a foam spray for door panels and any other panels,they make a mold clay like material that you can form also this help with weird shapes and areas u cant reach good,go to ur local audio supplier or look online or even ebay carries materials.goodluck with ur truck flawdafred