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December 5, 2023 Service bulletin

Service Update

Cadillac technical service bulletin N232412712 for 2021 Cadillac CT5 and 2021 Cadillac CT4.

Bulletin number
N232412712
Component
Engine and engine cooling: engine: engine control module (ecu/ECM)
Summary
Service Update - Certain vehicles with a 2.0L engine have an Engine Control Module (ECM) that may not properly diagnose, may not set Diagnostic Trouble Codes (DTCs), or may not illuminate the Malfunction Indicator Light (Check Engine Light) if certain fault conditions of the catalytic converter were to occur. Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates. Dealers are to reprogram the ECM.

Owners of these vehicles have filed 4 complaints in the engine category.

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