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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1557 (Door Lock System & Door Handles) >> Diagnostic Information and Procedures >> DTC B3125, B3130, or B3135 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Command the driver door and passenger door latches to LOCK and UNLOCK by using the door lock switch, the doors should perform the LOCK and UNLOCK function.