They talk about the chirp in this forum. I also drive in L9 on local streets and the chirp goes away and back to normal drive on highways. It's the DFM doing it thing https://www.gm-trucks.com/forums/topic/250973-2021-sierra-denali-62l-engine-or-exhaust-chirp-noise/
Remote System For questions or programming help, -R&c[0]=AT2y2eUfh8SCdZZ34cHGCHTW_fY2InMnxJp7KiSO4FyTa8JtUvmE42vmRXwsaQSyXUHbGKVBSworq7lI7ZbhB8a9ov46gm3o-49zFQbH7jpHX53EJrv4k9VkFtGZtXF5D-8hkAQom44UZQgqCzvaA8FlroVa7cz9']www.homelink.com/gm or call1-800-355-3515. I also had an issue setting up...
From gm site. If you choose “Decline/Delete,” you will not be reminded again and the update will not occur. Instead, you can take your vehicle to your dealer to perform the update at a later time.
I hear it when the air conditioner is on when i start the truck, It sounds like a grunting niose right after the engine starts. As for a smoke issue i haven't notice any.
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