Technical Service Bulletin A242435780 — 2024 CHEVROLET TRAILBLAZER

Emission Recall - General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles with a 1.2L engine. The engine control module may not properly control engine ignition timing following certain Auto Engine Stop/Start events. If this were to occur, the Malfunction Indicator Lamp (Check Engine Light) would illuminate, and the engine may run rough or knock. In some cases, if the vehicle is driven with engine knock, engine damage could occur. Proper engine ignition timing control will resume following a subsequent Auto Engine Stop/Start event. Dealers are to reprogram the Engine Control Module.