Melonhead1102· Super Moderator
2017 GMC Denali 2500HD, 3.5" Rough Country Lift, 305/55R20 Cooper Rugged Trek, Paragon Bed Cover
Are you sure your o-ring is seated correctly on the new filter? Might be worth pulling the filter again and inspecting the o-ring. The fact that there is a film on the filter makes me think you either mucked up the o-ring during installation or it was defective.