Buick TSB #N202312030

2018 Buick LaCrosse

TSB Document:

Affected Component: ELECTRICAL SYSTEM

Summary
Service Update Bulletin. In vehicles equipped with a 2.5L engine, the Engine Control Module (ECM) may not respond to test tools with the correct Calibration Verification Number (CVN). If not corrected, this could result in a failure of an emissions Inspection and Maintenance (I/M) test or prevent a service technician from confirming that the appropriate program data is in the ECM. Dealers are to perform two ECM reprogramming procedures.

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Date Published
SEP 03, 2020
NHTSA TSB #
10181647
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