Just a quick FYI - I had this happen to my 2001 GMC Yukon so it is not a new problem or a Chevy problem. The only thing I have found that works is Frost Fighter 2 part epoxy (I have no connection with them) - it is a two part 1:1 mixer with hardener and Silver paste and it does work! HOWEVER it does cost $28 and it has a shelf life; tried using an old set that I had on my 2007 Tahoe and it didn't last. Just so you know I used a fresh batch on my 2001 Yukon in 2007 and it withstood 3 years of Idaho winters and has now withstood 2 years of my son driving it (he is not kind to cars!) and it is still attached - so I am off to order me another kit - it does work.

 

Is there any of these do-it-yourself options that can be done in colder weather? (below freezing)

 

I haven't seen any. Mosts epoxies go thru an exothermic reaction as they set up. Any temperature reduction prolongs this process and if it's too cold, it stops altogether. We used epoxies that were premixed and frozen 'til we were ready to use.

FWIW if you want to accelerate epoxy cure, you can elevate the temperature somewhat.

 

I just fixed mine. I cleaned both surfaces. Added sauder to connector and sauder to window side. It works now

 

For searching ease: "solder"