Posted in the leak thread, but I did this method today on my ‘24 Ultimate after it leaked at 1,700 miles. Every penetration under the spoiler got 3m seam sealer as well as all the clips, fasteners, and grommets. This worked like a charm on my ‘23 AT4 as well.
Welp, 2024 Denali ultimate. 1700 miles and leaky window. Did the Leevon method in the garage today. Maybe GM will engineer this problem out on the next platform, but I’ll believe it when I see it.
I put Toyo Open Country AT3 285/60/20’s on mine like 3 days after I bought it. Mine came with the 265/60 m/T’s and were noisy as hell. Night and day difference with the A/T’s, and no speedo issues. Confirmed at 60 and 70 with Waze and were dead on with speedo.
Same here with my 23 AT4. I mainly use the YouTube music app on the GM infotainment, but it does this with all audio sources that I’ve tried. As other have said, GM is aware and looking into a solution.