Open it will help reduce air cavitation when one or more of the door windows are open. Will also help reduce AC usage with air fan running with fresh air intake open and rear window open. May also reduce time that truck wants to run defroster to prevent windows from fogging up which varies depending on humidity level and temperature inside cabin. Can save some mpg! Also can let dog pant outside of cabin without exposing his/her eyeballs from drying effects of high wind. Am not sure if there would be any advantage of it during camel mating season!It seems like those rear windows are so small they wouldn't be useful for anything. But even if they were bigger why do people want them? I do remember as a kid riding in the back of pick ups and being able to talk to passengers up front. But not too many people do that nowadays.
It's the one option I added that I want to pull from my order. Convince me otherwise![]()
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