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Home >> Chevrolet >> 2017 >> Traverse LS Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B257A: Headlamp Switch Input Signal Mismatch >> Circuit/System Verification

Circuit/System Verification

Ignition ON, turn the headlamp switch between the OFF and PARK positions. The park lamps should turn ON and OFF when changing between the selected states.

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