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June 8, 2020 Service bulletin

Emissions Recall

Chevrolet technical service bulletin N202304540 for 2018 Chevrolet Express.

Bulletin number
N202304540
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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