Good day all, Mice have found the way to the cabin air filter in my 14 Sierra 1500. The nest is large enough that nest material, leaves , urine, and feces clog the filter when the vent door is open to outside air. And the great danger is the hantavirus which can be transmitted through air and can be deadly. Where is the inlet for the cabin air? Under the battery platform? Someplace where we can add screening or stainless scrubbies? Gotta figure this out. I've changed filters but I have yet to find the answer to keeping the mice out. The inlet needs to be better screened. My Volvo is the only vehicle with no mice inside with a very fine mesh screen at the inlet easily accessible. Nice design. Good luck with this. I'll post if I figure this out. I would think the problem would be widespread and GM would be helping us out. You guys hear us? You're lurking here somewhere!