OER Parts offers a wide selection of Insulation and Sound Deadeners for your 1970 GMC C35/C3500 Pickup. OER Parts offers 1970 GMC C35/C3500 Pickup Cowl, Dash & Firewall, 1970 GMC C35/C3500 Pickup Doors, 1970 GMC C35/C3500 Pickup Floor, 1970 GMC C35/C3500 Pickup Kick Panels, 1970 GMC C35/C3500 Pickup Misc & Cut to Fit, 1970 GMC C35/C3500 Pickup Roof, 1970 GMC C35/C3500 Pickup Seat Shelf, 1970 GMC C35/C3500 Pickup Sets, and 1970 GMC C35/C3500 Pickup Trunk.