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Home >> GMC >> 2021 >> Yukon AT4 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> DTC B2B9B >> Circuit/System Description

Circuit/System Description

The indicator has a series of LEDs that show in which range the transmission is. The Transmission Range Indicator is monitored by the ECM via serial data.

For an overview of the component/system, refer to Instrument Cluster Description and Operation