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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> DTC B3819, B3820, B3822, or B3823 >> Conditions for Setting the DTC >> B3820 00

B3820 00

The BCM detects a fault in the left rear window down circuit.