This TSB applies to 2011-2013 Cadillac Escalade, Chevy Avalanche, Silverado, Suburban and Tahoe, and GMC Sierra and Yukon vehicles equipped with 20-inch chrome clad wheels.
While performing diagnostics, a technician may notice DTC B2455 stored as a history code in the vehicle communication interface module (VCIM) when there is no issue with the microphone.
Owners of various 2010-2013 GM vehicles may experience a Service Stability/Traction message, if the vehicle is equipped with electric steering.
2007-2013 Cadillac Escalades; Chevy Avalanche, Silverado, Suburban and Tahoe and GMC Sierra and Yukon models are equipped with a computer-controlled cranking system (also known as Bump-Start).
This TSB applies to 2004-2012 Cadillac Escalade and Escalade Hybrid, 2004-2012 Chevy Avalanche, Express, Silverado, Silverado Hybrid, Suburban, Tahoe and Tahoe Hybrid, 2004-2012 GMC Savana, Sierra, Sierra Hybrid, Yukon and Yukon Hybrid, 2003-2009 Hummer H2 and 2008-2009 Hummer H3 vehicles. This TSB relates to catalytic converter break-in information to prevent DTCs P0420 and/or P0430.
This TSB applies to a number of 2011 GM vehicles including the Buick Enclave, LaCrosse, Lucerne and Regal, Cadillac CTS, DTS, Escalade and SRX, Chevy Avalanche, Camaro, Corvette, Captiva, Colorado, Cruze, Equinox, Express, HHR, Impala, Malibu, Silverado, Suburban, Tahoe and Traverse, GMC Acadia, Canyon, Savana, Sierra, Terrain, Yukon, Yukon XL, Yukon Denail and Yukon Denali XL, all equipped with OnStar (generation 9.0 and 9.1 OnStar modules manufactured by LG).
Owners of some 2006-2011 Cadillac DTS and 2000-2005 DeVille vehicles may complain about corrosion in the floor pan in the battery area. This condition may be caused by acid weeping from a battery vent tube that has become dislodged.
Some owners of 2010-2012 Cadillac SRX vehicles equipped with all-wheel-drive may comment that the “service rear axle” message is displayed on the DIC.
This TSB applies to 2007-2011 Cadillac Escalade/Escalade ESV/Escalade EXT, 2007-2011 Chevy Avalanche/Express/Silverado 1500/Suburban and Tahoe, and 2007-2011 GMC Savana/Sierra 1500/Sierra Denali/Yukon/Yukon XL/Yukon Denali and Yukon Denali XL, all equipped with the Gen 4 V8 engine.
Some owners of 2008-2009 Cadillac CTS, SRX and STS vehicles equipped with the 6L50 automatic transmission may complain about erratic torque converter (TCC) operation or an illuminated MIL. Technicians may find DTCs P0751 and/or P0741 in the TCM as a history or active DTC.
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