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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Communications - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC U18A2 >> Conditions for Setting the DTC

Conditions for Setting the DTC

A supervised periodic message that includes the transmitter device availability has not been received.