The dealer's techs can adjust the chime volume (also controls onstar volume), I believe using the programming tool. This controls the level of the stereo volume into the amp. When I had my radio replaced they had it too loud and the chimes blasted me out.
You can adjust the chime volume between two levels, hold down the 6 button until the display changes.
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2010 Red Rock Metallic H3. Just as cool as the first four Hummers I owned. Yeah, I have a problem.
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