working on a 2000 Denali (old body style) drivers switch works the passenger window up and down fine. Passenger switch nothing, replaced switch twice, still nothing. Pulled switches on both sides and found a two wire plug under the drivers switch that seemingly has no home? No empty port on switch panel at all. Without sounding too ridiculous does anyone have any ideas? The unplugged wiring was brown and gray (ish) thanks so much!