Originally Posted by dakotaflyer

Update, it seems there are drain holes on each side behind the front wheels. Not visible due to structure (at least not easily visible - maybe on a lift), but I could feel what would appear to be holes that lead right up to the fresh air chamber. Certainly big enough for mice or even chipmunks to get up there with acorns! Am I missing a plug of some kind on each side? Or do we all have this critter-access feature designed into our trucks? Either way, I'll have to find a way to block them while still allowing water to get out. Thanks for the tips!