Not using one but looks like a good idea. My windows are tinted and I keep them cracked open a bit when parked, if not rolled down all the way depending on circumstances.
BTW, I paid $12K for my '02 Silverado 1500 full box extended cab 2wd 4.8 back in '06. It had approx. 90k miles and now has approx. 160k miles and it doing great.
It's white in color too.
