Have to admit this is some discouraging things to read about these new models. I've had many new & used GM cars & trucks through the years & been pretty pleased with all of them - even the used ones. We've had 96, 99, 05 & 08 Tahoes, 87, 89, 90 454SS, 01 EC, 07 CC Silverados, 95 & 96 Impala SS and liked them all. 99 would not start on my wife every half year or so & I discovered the battery bolt kept coming loose - put an 8mm wrench in the glovebox & showed her how to fix it herself. The 05 PPV Tahoe has been the highest mileage & had some PITA repairs but nothing extremely expensive just labor intensive (wheel bearings, fuel pump, hvac diverters). I must say that I take over repairs once they're out of warranty to keep costs down. Had an 06 Charger that got sold the second time it died for no reason "while driving" but restarted - I expected an eventual wiring nightmare coming.
We just ordered/purchased this 2017 Tahoe LT 2WD & love it - hope it holds up much better than some on here. I will admit this is the first time I've ever purchased an extended warranty just because of the electronics in this monster.
Good luck to you all.