Hello there, I'm new here. I currently drive a 2020 yukon xl denali 6.2L with 38K kilometers on it. My engine just started doing this on Saturday. Fired up no problem but immediately stalled at idle. I tried again and it fired right up again, I noticed a little puff of black smoke on the initial fire but it again stalled at idle. It did this 6 more times. No check engine light or warnings of any kind. The my gmc app says no issues,good to go.
I gave up and called onstar and they sent a tow truck. It is currently at the dealership waiting for service. Has anyone figured this issue out yet?
Thanks,
Jeremy
