RE: Reducing Cabin Road Noise
Dynomat should reduce alot of tire noise but not maybe all. Considering once you installed it in all four doors there might still but tire noise that came underneath your truck or through your dash and underneath your dash. I would do bit and pieces at a time and see how it helps.
'08 GMC Sierra 1500 SLT 4x4, 2" leveling kit, hypertech max chip, k&n air intake kit, throttle body spacer