Hello Everybody,
After I upgrade the 6 CDs' to Navigation aftermarket OEM, every things are perfect sound, CD, Navigation, radio, etc... except the chimes become very loudly which I can't afford. I tried from setup but unfortunately with no success. it seem it doesn't comply with volume setting from the new navigation. after searching in the same issue in HUMMER forums I found nothing has been resolved, all topics was very old even the latest was from 2011. I would appreciate if any one face the same issue and got it resolved or who can help in this topic.

Car specifications:
Make: HUMMER
Model: H3
Year: 2006
Old sound system: OEM 6 CDs Monsoon W/O On-Star
New sound system: OEM aftermarket navigation W/ Monsoon

Hopefully I could scripted the issue clearly

Thanks in Advance
Regards