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Home >> GMC >> 2004 >> Sierra 2500, 4D Pickup, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Data Link Communication System >> Diagnostic Information and Procedures >> DTC U1881 To U1899: Starter/Generator Control Module Lost Communication With Engine Control Module (ECM)/Powertrain Control Module (PCM) >> Conditions for Setting the DTC

Conditions for Setting the DTC

A node alive message has not been received from an identified module within the last 5 seconds after establishing class 2 serial data communication, or a supervised high speed GMLAN message has not been received.