PI0774B

Bulletin No.: PI0774B
Date: Dec-2012
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.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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