2021Trailblazer RS AWD Scarlet Red Metallic
I did some research trying to find a K&N air filter and cabin air filter for our Trailblazers. When I did the cross reference search on K&N's web site I found this info. The factory cabin air filter for the 2021 Trailblazer is AC Delco CF185 which is the same as K&N VF2071. The factory air filter is AC Delco A3251C, but I couldn't find a K&N air filter to cross reference, so it appears the cabin air filter is all we can get right now from K&N.