I had a GMC 05-5500 CC 4X4 that lost a head gasket. Out of warranty (warranty on the medium duties was only 2 years on that model, not sure if that has changed) by a long shot and GM kicked in 4K on a 7K repair. I was happy with that. Other than that I have not had any issue not covered. I would hope GM will do the right thing, as stated they have a history of standing behind the warranty and then some. I see no reason why they wouldn't as it is clearly a warrantied component. No water, no aftermarket components to muddy the situation. I tend to buy from the same Chevy and GMC dealers. Like I have said before, relationships matter. While loyalty doesn't always save the day, it sure helps. When I was trying to get GM to cover the head gasket on the 5500, they wanted a list of all the GM vehicles I have had. It was a long list, and while I can only speculate as to the impact of that list, it no doubt played a part.
