My 2005 GMC Sierra has just >80,000 kms on it, and I'm having to replace a second wheel bearing hub. A few months ago, the rear left wheel almost came off because the bearings were falling out of the hub. Yesterday, the same thing happened while travelling on a highway with the front left wheel. While my truck was being pulled up onto the tow truck, all the bearings fell out of the wheel - one was completely ground, the others were perfect. A few more turns or bumps and I suspect I would have lost the wheel.

I didn't have any grinding noises with the front tire (although I did with the rear) - the front hub deteriorated really quickly (within 100kms of driving), and it sounded like cables snapping while driving which was likely the bearings tumbling around.

I'm wondering if there is anyone out there who has been having similar problems with the GMC Sierra wheel bearing hubs/integrated ABS sensors?

Should the hubs be wearing out so quickly?

It seems like a safety hazard to me, since there wasn't any early warning signs of a major hub meltdown.

And I'm not sure if this has anything to do with it, but I've also had to have my rotors ground down 3 times and replaced once since new.

I'd like to hear from anyone who might have had similar experiences.

Thanks!