http://www.sacbee.com/content/news/story/14280393p-15088817c.html

Quote :
Engineers at the National Highway Transportation Safety Administration are studying how a part called a steering knuckle fractured or failed in the incidents, causing H2 suspensions to collapse or their wheels to separate.

NHTSA engineers also have gathered data about 61 steering knuckle failures on three-quarter-ton GM Suburban and Avalanche pickup trucks that used the same part, according to documents the company submitted to the government as part of the safety probe.

So… GM changes the part to “improve” it’s product, yet can’t admit to there being a problem w/ the part that needed changing… Hummer owners may be that stupid, but the rest of us aren’t… way to go champs!