Yeah, I bought my old H3 Alpha there......They never did seem interested in calling me back either....
One word of advise: Do not take your Hummer back to the chevy store to be serviced for anything! They supposedly did an oil change for me, and actually never changed it..and the same for a recall....said they did it, billed GM, and never replaced a part....I had the same part when I got the truck back
So just be careful where you bring your truck to be fixed!