Recent content by gac565s

  1. G

    2021 Sierra Denali 3.0

    Thank you for the welcome @gemarsh! Yes, I have tried a few different options that help temporarily, including tape. I have tried twisting pip-cleaners and gently wrapping them around the gap between the arm and mirror. I do not have a bug deflector or window visors. Cracking the window doesn't...
  2. G

    2021 Sierra Denali 3.0

    - My local GMC & Chevy dealerships have not experienced this issue with other cutomers, so here I am. My driver side rear view mirror makes an incredibly annoying "whistle" sound when driving 70+ mph OR if it is extremely windy on the highway. When I fold the mirrors in, it goes away. Anyone...
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