Do you have a cabin air filter?

[HiHoeSilver]

Is the location behind the glovebox, or above passengers feet, like some Silverado’s? I just got a 2013 & going to clean the entire system out. I live in the humid Dirty South & I know it needs some cleaning.

Remove the center and right kickplate screws (the left one is up behind the console. Don't bother with it. Trust me. Lol) and let it hang. No need to touch the glove box.