Leave GPS in car or take inside?

Just wondering what most people do.

I'm not so concerned with theft, living in a small town with nosey neighbors and a huge locking console in my truck but I'm kind of paranoid at what effects the extreme temps may have on the unit. Mostly the screen. Would be interested to hear if anyone has had any bad experiences leaving their units to the ravages of temperature extremes, or for that matter if someone in Death Valley or Nome, Alaska has never had a problem.

I bring mine in the house when it's not in use. So what do ya'll do?

Thanks for the input!