October 5, 2012 Service bulletin

This Preliminary Information communication provides information to the technician about vehicles that the...

Chevrolet technical service bulletin PIT4508C for 2007-2013 Chevrolet Tahoe, 2007-2013 Chevrolet Silverado and 2007-2013 Chevrolet Suburban and others.

Bulletin number: PIT4508C
Component: Electrical system: integrated trailer brake control
Summary: This Preliminary Information communication provides information to the technician about vehicles that the cruise control being inoperative. Technician may find Diagnostic Trouble Code B3894 set in the Trailer Brake Control Module. Technician should follow published Service Information diagnostics first. Technician should check the "Master Cylinder Pressure" sensor parameter listed in the Trailer Brake Control Module data list. If it is displaying pressure with no brake pedal input, suspect a concern with the Master Cylinder Pressure Sensor, wiring/terminals, or Electronic Brake Control Module.

Owners of these vehicles have filed 846 complaints in the electrical category.

Vehicles covered

Chevrolet Tahoe 2007-2013 2007 2008 2009 2010 2011 2012 2013
Chevrolet Silverado 2007-2013 2007 2008 2009 2010 2011 2012 2013
Chevrolet Suburban 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Yukon 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Sierra 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Yukon XL 2007-2013 2007 2008 2009 2010 2011 2012 2013
Chevrolet Avalanche 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Yukon Denali 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Yukon Denali XL 2007-2013 2007 2008 2009 2010 2011 2012 2013
GMC Sierra Denali 2007-2013 2007 2008 2009 2010 2011 2012 2013

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