Tearing down my truck, I think I have found more of that "gummy strip stuff" we used to call dum dum than anything. It is that playdough looking stuff that comes in strips and never dries hard. There is definitely anti-squeak tactics taken in the cab and front end but not so much in the bed and rear part of the truck. I Think they made an effort to quiet down the "living area". The work part of the truck ...not so much.