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TSB Document:

Affected Component: ELECTRICAL SYSTEM

Summary
Customer Satisfaction Program. Certain vehicles, equipped with a 5.3 L engine, may have a diagnostic calibration in the engine control module (ECM) causing it to stay awake resulting in a parasitic drain on the battery. This could cause diagnostic trouble code (DTC) P0111 and the presence of other low voltage DTC?s. Dealers will update the ECM with the latest calibrations.

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Date Published
MAY 04, 2021
NHTSA TSB #
10197316
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