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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B3935: Incorrect Environmental Identifier Received >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Replace the suspected inoperative or malfunctioning transmitter.
  2. Verify DTC B3935 is not set as current.
    • If the DTC is set as current 

      Replace the K9 Body Control Module.

    • If the DTC is set as history 
  3. All OK.
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