I rode in my buddies 2000 extended cab/auto. It is a heck of alot quieter inside the cab than my 98. 5 is. The only difference is his has carpet on the floor and mine does not. Mine is a Sport. Is the insulation that much better on the 2000 that is making it that much guieter? There is a big difference in sound level between the two. Any thoughts? Thanks, Bob