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Home >> Buick >> 2016 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC U1811: Battery Energy Control Module Powertrain Expansion CAN Bus Off Malfunction >> Circuit/System Description
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Circuit/System Description

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

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