Has anyone else had to have the entire head replaced? I smell recall.

[H3MTA3]

Well it finally happened. I'm having to replace the head on my H3. I have 27,500 miles on her. I was noticing my 3 was idleing a little rough and the engine was shaking after popping the hood. The engine light came on and drove it over to the dealership. The manager said he was told in a meeting, with executives of GM on the Hummer line, that the heads were being damaged by gasoline. The material used to design the heads was too soft and the switch from winter grade to summer grade gas was destroying the heads. The manager said Hummer is rebuliding heads with a stronger material to hold up to the different types of gas. Not sure how true this is, but at the time it sounded good. Don't really care what the cause is, i just want them to fix my H3 and not have to worry about this in the future. Curious if anyone has heard anything like this from their dealership.
H3MTA3