Anywone know what the difference is between the GMID (family or relative discount?) and the GM in my driveway discount is? I know that sounds funny, but it does exist. Even the manager at the local Hummer dealership laugh when I asked him. Called me back the next day and said yes, that they would honor it. My question is, which one is the bigger discount? I'm just glad to be able to get either. Thanks
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