PI0774B

File in Section:
Service Bulletin
Bulletin No.:
Date:
PI0774B
December, 2012
PRELIMINARY INFORMATION
Subject:
Handsfree/Bluetooth Audio Quality Issues
Models:
2008-2013 GM Passenger Cars and Trucks
This PI is being revised to remove RPO restrictions. Please discard PI0774A.
Condition/Concern
Some customers may comment on voice dropouts, excessive noise cancellation, and muffled sound. This occurs
more often with Blackberry devices.
Excessive echo and noise cancellation features on consumers phones can cause this occurrence.
Recommendation/Instructions
Advise the customer to turn “Echo Control” and noise cancellation OFF on personal cell phones that are paired to
the vehicle. Doing this improves the quality of communications. This option is not available on all personal cell
phones; however, it is a choice on Blackberry mobile phones.
Example : On the Blackberry Bold 9650, the user would follow these steps to adjust the setting- Choose the wrench
icon (“Options”), Networks & Connections, Bluetooth Connections, Select a paired device (e.g. “Your Vehicle”),
Choose “Device Properties”, Scroll down to “Echo Control” and change it to “OFF” via the dropdown menu. Please
refer to www.gm.com/bluetooth for additional information.*
*Canadian dealers: This URL links to a website containing information specific to phone models offered by U.S.
based cellular service providers. Canadian service providers may offer similar phone models with similar feature
compatibility.