2024 Buick Envision — dealer cannot reproduce an intermittent warning

Write down what you already tried. A second data point from another 2024 Buick Envision owner helps more than a generic diagnosis. Then you'll know the next fork. Write the result down so the next test isn't a repeat of the last one. I'd sleep better after that step, even if it finds nothing. This is the version I'd tell a friend.

Don't overfit one forum story to your car. If it still isn't clear on the 2024 Buick Envision, a specialist hour can be cheaper than another round of parts. That's where I'd start. Have you gotten a second quote in writing? I'm in no rush to be a hero on it.