Quick update for you all. The dealer logged a code from the Yukon. Working through the troubleshooting steps in the manual, the dealer determined that the right front short range radar sensor needs to be replaced. Apparently, when the parts dept tried to order the referenced P/N, it didn't ring up. So they are reaching out to GM to determine the correct P/N and will order it. Hopefully this fixes the issue! I'll keep you all posted.