How do you fix a frozen door latch on a 1997 Chevy blazer door won't close after being frozen shut?

I'm having the same difficulty on my 2005 Freestyle. The latch freezes, and when I go to shut the door, it just bounces back open. I have had some success blowing a blow dryer into the latch mechanism. It is only temporary though. It seems that there's some moisture in the mechanism, or some other supply of moisture getting to the mechanism (perhaps some ice frozen in the window seal that's melting, dripping, and refreezing). Some quick internet research has seemed to yield the following steps which I'll try this evening. 1. Eliminate any source of water getting into the door. 2. Blow dry for an extended period of time. Enough to dry the inside of the door out. 3. Check the drain holes at the bottom of the door to ensure that they are open and draining. Good luck.