71GMC_3/4T

Sounds like a starter, but it sounds way too new to have a bad starter. Unless you start it often. How are your battery terminals? Did you clean and scrape them and put some protection on them? One would assume they are still factory. Are you in the rust belt?

Should be only the driver's window, from the driver's door panel. I'd also like to know how he got it to do all of them.