You will always find scary stuff on car forums. For what it's what my tahoe has been 100% reliable through about 6 months of ownership. I'm currently in the process of planning yet another road trip of about 1,000 miles without hesitation about this trucks ability to perform. I personally know 2 other owners of '21s having the same experience as me. There are undoubtedly some issues being worked though and you will hear stories of complete lemons that have rolled off the line, but I think that has to be expected regardless of the manufacturer, generation or model year. I'll bundle any recalls with my free oil change and besides that it's been smooth sailing in an incredible performing family hauler. Just wanted to share my positive experience since you seem to be convinced this is a crappy product...from my first hand experience it is not. I do however understand the hesitation when dropping this kind of cash.
My 2012 has had zero problems, no TSBs nothing, so maybe I'm spoiled. At this time the 2021 has four recalls and 296 TSBs but I never said it is a crappy vehicle I'm saying it doesn't have the overall reliability for me to consider it especially after the test drive revealed a few issues. GM is experiencing part supply problems and quality control issues at the assembly plants. I suspect the covid pandemic has caused employee shortages and perhaps dissatisfaction among those forced to work.
Overall things aren't as they once were and to top it off dealerships are seeing less customer satisfaction with their experiences. My dealership has had a complete turnover in personnel so I suspect their pay and benefits have been reduced resulting in less qualified and motivated service personnel.
I'm from another era and I realize it will never be what it once was but I also believe pretending otherwise isn't the answer. We need to be reminded occasionally that we are headed in the wrong direction.
BTW, my 2012 gets 20 to 22 MPG on trips what are you getting?