RandyR

When I had this issue on my 2019, I had my son get in the back seat and listen. He discovered the bottom edge of the rear window was not even touching the frame, there was literally 1/4" gap, but only underway. I took it to a dealer and they fixed it. Told me, "It's fairly common, the surface at the lower edge of the window opening wasn't properly prepared at the factory and a lot of the windows come loose at the bottom." It makes a whisting/futtering noise.

Is it OK to drive it in "Auto 4WD" all the time? Does it impact fuel economy or drive-train wear? Seem silly to have in Auto on perfectly clear smooth roads with nothin loose or wet.

An educated guess - based on a similar prior experience: Sounds like there's wiring crossed between the fuse you didn't pull and the high beam on the other side. If the plow has high and low beams, I suspect they just connected the Hi beams together not realizing they're 2 separate circuits on your truck... Good Luck!

I found the cause of the wind noise: The entire lower edge of the rear window is not attached to the body. When underway, there's 1/8 - 1/4" gap between the window and the body. How to fix this is the next question...

My 2019 Silverado 1500 LD (solid rear window) has wind noise that appears to be coming from the right (passenger) side near the top of the window. I've seen others report a water leak in that area and I'm not experiencing that (yet) just the wind noise. I thought about running a bead of "Mortite" caulking cord around the top and sides of the window, but don't want to create a worse issue by potentially trapping water along the top ledge of the window. Anyone have ideas on the fix for this? Thanks!