Left side windows.....

[DDC55848]

I bought my 13 Silverado it crew cab April of 18,  in August of 18 the left side windows stopped working, most of the time. I naturally assumed I had a broken wire in the driver's door harness, which I replaced, along with the window  switch. Still doesn't work except on the rare occasion that both windows work for a brief time then nothing for weeks. I've had an autel808 scanner hooked to it and it tells me that the back is good and when I move the left switches it says that my windows are operating. I need help, I have done pulled all my hair out. Kepp in mind the right ones work just fine. Thanks for your input.