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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1303 (Door Lock System & Door Handles) >> Diagnostic Information and Procedures >> DTC B2976 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the driver door lock.
  2. With the switch in the open position, test for infinite resistance between the signal terminal and the ground terminal listed below:
    • Signal terminal 6 and ground terminal 8 (with RPO AU3).
    • Signal terminal 4 and ground terminal 6 (without RPO AU3).
    • If not the specified value, replace the driver door lock.
  3. With the switch in the closed position, test for less than 2 ohms between the signal terminal and the ground terminal listed below:
    • Signal terminal 6 and ground terminal 8 (with RPO AU3).
    • Signal terminal 4 and ground terminal 6 (without RPO AU3).
    • If greater than the specified range, replace the driver door lock.
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