I park my truck in a heated underground garage at work and am finding that after the snow melts and I leave the underground the rear power window will freeze shut.

Any suggestion on how to prevent this?

 

Do you have the defroster on that window? My suggestion would be to turn that on before you leave the garage to try and keep things thawed out. It might still eventually freeze up if you let the truck sit for a while in freezing temperatures, but if you drive long enough with the defroster on, it might dry things out enough to keep it from freezing shut. If you don't have the defroster, not sure what else to suggest.

I do have to ask, why on earth are you trying to open your slider in the middle of winter?

 

Mine in my 2002 has two drain holes in bottom rail where the water goes when snow melts or it rains. Maybe yours is plugged or never cleared out when assembled.

 

Chug,
I have tried to warm things up using the rear defroster but it does not help to alleviate any ice that is preventing the window from opening.

Cracking the rear window open acts like a venturi allowing the cold air to escape the interior cabin as the HVAC system blows the warm air into the cabin. This tends to heat things up more quickly than if I just left it closed. Its a large area to heat up and on those cold days this really helps to speed up the process.

rus,
I'd like to check for these drain holes, can you detail a little further where I would need to look for them?

 

Interesting idea, never thought about that. Granted, it doesn't get terribly cold where I am so, I never thought about it. Would cracking the rear windows provide the same effect?

I'll tell you, the heaters in these truck aren't the quickest to heat up, much like my old 91 F-150. I may try cracking the rear windows to see if it provides a similar effect to what you describe with your slider. I have a fixed rear window, so that is not an option for me.