From a distance I would have to agree with First Hummer. The BCM controls all those functions. I would have thought the dealer would have replaced the BCM right away. They like to blame everything on the BCM and in this case it sure sounds like it has gone wacko (engineering term for malfunctioning).
Call Hummer assistance at the 800 number in your owner's manual.
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Black Sheep Hummer Squadron
(ME TOO)
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