I was in the drive through at Wendy's yesterday with the windows up and the a/c on and my truck just started overheating. The coolant temp was almost in the red with me just sitting there idling. Now, here is another thing, when I got home, i rolled the windows up and as i held both buttons in the roll up position the coolant temp gauge jumped up. I don't know if there is a short in the system or what but it shouldn't be overheating like that in the first place. Any opinions on what it may be?