Electrical system
Chevrolet technical service bulletin PIT4811C for 2009-2011 Chevrolet Silverado 1500, 2012 Chevrolet Silverado 2500 and 2009-2013 Cadillac Escalade and others.
- Bulletin number
- PIT4811C
- Component
- Electrical system
- Summary
- This Preliminary Information communication provides the technician with the steps on how to diagnose vehicles with a no crank with multiple Diagnostic Trouble Codes set in several different modules with Regular Production Option Code HP2. Technician will retrieve all the Diagnostic Trouble Codes that are set current in the vehicle. When there are multiple Diagnostic Trouble Codes technician may wonder were to start the diagnose process. Technician will address Diagnostic Trouble Codes P1AE2-P1AE4, P1B05, or P1B06 first as they're related to the High Voltage System Interlock Circuit for the high voltage system. Second Diagnostic Trouble Codes to address will be any loss of communication Diagnostic Trouble Codes related to the Powertrain expansion bus or the high speed LAN bus. Then address any low voltage concerns that may be related to a low 12 volt battery.
Owners of these vehicles have filed 171 complaints in the electrical category.
Vehicles covered
- Chevrolet Silverado 1500 2009-2011 200920102011
- Chevrolet Silverado 2500 2012 2012
- Cadillac Escalade 2009-2013 20092010201120122013
- Chevrolet Silverado 3500 2013 2013
- Chevrolet Tahoe Hybrid 2008-2013 200820092010201120122013
- GMC Yukon Hybrid 2008-2013 200820092010201120122013
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