Sounds like the OnStar thingamajig (module?). I have 99s and had a 40th also. It had that and 99s don't. I think it actually says OnStar on the cover.
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03-07-2015
Sounds like the OnStar thingamajig (module?). I have 99s and had a 40th also. It had that and 99s don't. I think it actually says OnStar on the cover.
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