That's certainly right. All of the truck platform models seem to have a lot of issues with various grounds. Where's the QC?
I spoke with a Lemon Law law firm already as a backup plan. I won't get into the details here since this is a public forum but as a last resort it is on the back burner. I also did buy this Yukon used with 34,000 miles. Build date of September of 2018, bought it in December of 2019. It was a Hertz rental.
I honestly do like the truck and would most forgiving-ly prefer to keep it so as long as the issues do not re-occur. But that's an uncertainty considering they've already come back twice. I wish they would have found whatever was wrong with this ground the first time. Just shows that, like you said, the length of time at which things are investigated is sometimes sub-par.
Don't forget about the G218 ground issue on the dash that was an issue for all trucks and SUVs built prior to June of 2015. Bleh. Whoever is doing their job isn't paying attention. I don't think a robotic arm tightens down these grounds, or do they?
I haven't taken the time to find this ground thus far, so for now I'll take the tech's word from his notes.