Most newer cars are good for 200k miles easily.  That said, you might want to check out www.carsurvey.org, where real owners post problems they have had with their vehicles.  Read what kinds of problems others are experiencing and see what you might likely face.

i had a 97 tahoe 2 dr and i sold it with 438000 Km on it... original engine.. still held 40PSI oil pressure.... just gotta change the oil, man!!!

well my 2003 Tahoe has 160,000 miles on it now and is still running. i have had nothing wrong with it and we bought it new.

my 99 has 171000 mi on it is strong as a rock it tows like there is nothing back there and rides like a dream