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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 321 (Frame And Underbody) >> Diagnostic Information and Procedures >> DTC B051A, B051B, B051C, or B051D >> Circuit/System Verification

Circuit/System Verification

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OPEN and CLOSE each vehicle door, the running boards should extend when the door is OPENED, and retract when the door is CLOSED.