I work in a well-to-do part of Dallas. If you drive around this part of town you'd think a Tahoe/Yukon/Suburban convention was in town. Without exaggeration, every 4th vehicle is one of them. I went to lunch the other day and counted 8 (8!) identical white/black/grey Yukon Denali XLs parked in a row. It would have been 10 but there was a white Range Rover and a Tahoe breaking the streak.
All the moms around here (and some of the dads) just wander into the GM dealership every year and ask for the new version. I see at least 2 every day with paper dealer plates on them...folks are still buying them even though a new model is right around the corner. They don't care because it's what they have always bought and they will be buying another one next year. Selling cars at Sewell GMC here in Dallas has got to be the easiest job on earth.
All this to say, GM would have to screw up really, really, REALLY badly to change the market share numbers
@JExpedition07 posted above. The General is going to sell a billion of these things regardless of what they look like or what's under the hood. Sure, they will lose a few folks on the margins for one reason or another, but the loyalty is truly amazing. I guess that's what Ford gets for waiting a decade too long to update the Expi.