I wonder if they are problematic. My Tahoe has about 3k miles and hasn't has a single mechanical problem, not one. I'm sure something will come up eventually but I'm also sure you can get on just about any forum for any new vehicle and get the impression it's problematic becasue that's the first place people go to vent frustration when they have an issue. I'm sure there are thousands of happy owners such as myself out there. I remember getting on forums when I purchased my last new vehicle 7 years ago and being terrified by what I read...well 7 years later and nothing but routine maintence expenses.