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TSB Document:

Affected Component: EQUIPMENT:ELECTRICAL

Summary
Emissions Recall. General Motors has decided to conduct a voluntary emissions recall involving certain vehicles. The engine control module (ECM) in these vehicles may not be able to properly diagnose reduced efficiency issues within the catalytic converter. If the catalytic converter?s efficiency would become reduced, tailpipe emissions could exceed acceptable standards without illuminating the Malfunction Indicator Lamp (Check Engine Light). Dealers are to reprogram the ECM.

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Date Published
JUN 08, 2020
NHTSA TSB #
10177356
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