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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 336 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B243A or B243B: Front Seat Heating Switch >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

An internal fault is detection inside the seat heating and cooling switch. No external circuits are involved.

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