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TSB Document:

Affected Component: ELECTRICAL SYSTEM:SOFTWARE

Summary
This Preliminary Information communication provides information to help the dealership technicians perform a parasitic drain test for the OnStar module. When performing battery parasitic drain test, there may be some confusion as to what the normal power consumption reading should be from the OnStar system.

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Date Published
FEB 24, 2017
NHTSA TSB #
10113454
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