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Home >> GMC >> 2018 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 331 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1271: Theft Protection Active >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition On/Vehicle in Service Mode. Control Module ON.
  2. Verify DTC B1271 is not set in Control Module.
    • If DTC B1271 is set in Control Module 

      Replace the Control Module.

    • If DTC B1271 is not set in Control Module 
  3. All OK.
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