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TSB Document:

Affected Component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

Summary
This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent "Service Charging System" message on the Driver Information Center or a Battery Malfunction Indicator Lamp during an auto stop event. If there is no fault found during diagnostics for P0621 contact General Motors Technical Assistance Center for further assistance.

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Date Published
FEB 17, 2015
NHTSA TSB #
10114415
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