2017 EGR issue, no part available
 

Anyone having this same problem?
17 Denali 2500, 600 miles. Countdown to 65mph maximum speed error message popped up, dealer says the EGR is bad along with the reductant heater #1. Their parts department has been looking for the EGR for 2 weeks now, with no luck. Supposedly back ordered with none available in the entire country.