February 21: Recall: GM Rear Wheels Lockup While Driving recalls | 0 days ago
January 19: GM Engine Failure Recall Investigation Opened investigations | 33 days ago
January 2: GM Says Brake Master Cylinder Failure Lawsuit Fails news | 50 days ago
December 28: GM Lifter Failure Lawsuit Includes Multiple Models news | 55 days ago
December 22: GM Air Conditioning Class Action Lawsuit: 8 Years in Court news | 61 days ago
GMC TSB #10-08-46-001B
2012 GMC Sierra 2500
TSB Document:
Affected Component: EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM)
- Summary
- This Technical bulletin provides a procedure to request a hard mute from Onstar when navigation is annoucing directions and to correct the customers concern of the radio being loud during navigation.
Click a tab for more information.




