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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1559 (Door Lock System & Door Handles) >> Diagnostic Information and Procedures >> Power Door Locks Malfunction (RPO AU3 Without 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, observe the scan tool Driver Door Unlock Sw. and Driver Door Lock Sw. parameters while using the driver door lock switch. The parameter should change from Inactive to Active.
    • If the value does not change, refer to Door Lock Switch Malfunction.
  2. Observe the scan tool Psgr Door Unlock Sw. and Psgr Door Lock Sw. parameters while using the passenger door lock switch. The parameter should change from Inactive to Active.
    • If the value does not change, refer to Door Lock Switch Malfunction.
  3. Command the doors to LOCK and UNLOCK with a scan tool, all doors should perform the LOCK and UNLOCK function.
    • If one or more doors do not LOCK or UNLOCK, refer to Door Lock Malfunction.
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