I've been consistently dissapointed with Hummer dealer service. 3 years, 4 separate dealers and more crappy experiences than I can recall.
My last paragon of service involved a puking Fuel Filter (following a change) that leaked 1/4 of a tank of gas out into my garage floor. I'm really fortunate nothing "incendiary" occured.
I'm on the edge of extended warranty expiration and have been conflicted about what to do. I've heard bad things about 3rd party coverage.
Ah, I feel better now.