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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 >> Power Door Locks Malfunction (RPO AN3/DL3) >> 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.
  1. Ignition ON, command the front doors to LOCK and UNLOCK by using the door lock switches, the front doors should perform LOCK and UNLOCK function.
    • If the driver door does not LOCK or UNLOCK, refer to Driver Door Lock Malfunction.
    • If the passenger door does not LOCK or UNLOCK, refer to Passenger Door Lock Malfunction
  2. Command the rear doors to LOCK and UNLOCK with a scan tool, the rear doors should perform LOCK and UNLOCK function.
    • If a rear door does not LOCK or UNLOCK, refer to Rear Door Lock Malfunction
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