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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U1811 >> Circuit/System Description

Circuit/System Description

The powertrain high speed GMLAN serial data circuits are serial data buses used to communicate information between the control modules.

This diagnostic is used to check the powertrain high speed GMLAN communication bus status.