It's not just GM's... it's all cars these days when it comes to wheel bearings. Leah's 2003 Ford Sport trac collapsed the front bearings at 61,000 KM last May and one of the replacements is shot already and thumping.
Our son came home yesteday with his 2005 Focus... 51,000 KM (30,000 friggin miles).. Rear left wheel bearing shot... which is nuts on a "follow" wheel that doesn't even get steering load. Bernie tells me he changes a handfull of wheel bearings a week in his shop... so how many millions is that country wide? Underdesigned junk all around with bearings placed too close together to combat torsion loads. Our three 60's/70's vehicles still have their original wheel bearings and brake lines !