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Home >> Chevrolet >> 2020 >> Sonic LT, 4D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications >> Diagnostic Information and Procedures >> DTC U0078 >> Circuit/System Description
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Circuit/System Description

The low speed GMLAN serial data bus is used to communicate information between the low speed GMLAN devices. The serial data is transmitted over a single wire to the appropriate devices.