My 2021 RST had the same warning light come on at 500 miles, I called the dealer right then as I was driving home. They said they could look at it 8 days later and that was the earliest appointment available. Once the sale is made we’re simply looked at as a number.
I had work out of town the following two days and put on 175 miles, filled up the tank and the warning light went off the next day. I made sure to take pictures and document my phone calls.
I own a 2021 RST and the whistling starts aroun 35 mph. It’s very soft sounding and appears to be closer to the drivers rear tire. That said, I saw were someone stated that it was from a “too small” gas vent tube that flattens and then gives off the whistling noise. I’m going to the dealer today so they can give me the fix or just waist my time as usual. Service sucks these days no matter what industry involved and the auto industry may be the worst.