2020 Sierra SLT
This morning I noticed a buzzing noise coming from the rear of the cab. The sound came from the right bottom of the rear window. The buzzing stops when I turned the rear defroster off. Turned the rear defroster back on, the buzzing started again.
Has anyone else had, or noticed, this problem? I tried to find a connecter to see if it was loose but couldn't find it. I don't think it's affected the performance of the defroster, at least not yet. I figure it'll require a trip to my dealership's service department, which I'm not a huge fan of.
Thanks for your time,
DC