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GMC TSB #PI0774B

2009 GMC Sierra 2500

TSB Document:

MC-10138556-9999.pdf

Affected Component: EQUIPMENT:ELECTRICAL

Summary: This preliminary information bulletin provides a descritption of operation of the echo control and noise cancellation settings for concernc regarding noice drop outs during calls and muffled sound.

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Date Published: DEC 04, 2012
NHTSA TSB #: 10138556

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