re: car question: passenger front window not working on driver door controls

I have had this problem many times with my 2008 Silverado. Dust and dirt gets in the switch at the point where the little metal button glued to the rubber flex sheet touches the contacts on the circuit board. The dirt makes what I would describe as a tiny booger and prevents the circuit closing.

You need to take the switch apart and either gently scrape it or use the contact cleaner. Cleaning the connector prongs won’t likely fix the problem. Buying a new switch is the sure way to fix it.