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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Secondary And Configurable Customer Control System >> Diagnostic Information And Procedures >> DTC B3622: Steering Wheel Controls Signal Circuit >> Circuit/System Description
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Circuit/System Description

The steering wheel controls are divided into a right-hand set and left-hand set. The right - hand switch communicates with the instrument cluster through serial data and provides input from the rear left - hand switch and rear right - hand switch. The instrument cluster identifies the switch selection and activates the feature.