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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1139 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B1015 (without RPO Y41) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. With a scan tool, verify the stored VIN in the BCM matches the actual vehicle VIN.
    • If VIN does not match, perform the BCM Programming/RPO Configuration procedure. If the BCM VIN does not match the actual VIN after programming, replace the BCM.
  2. With a scan tool, verify the stored VIN in the following modules match the actual vehicle VIN:
    • IPC
    • XBCM
    • DDM
    • PDM
    • If any modules stored VIN does not match the actual VIN perform the setup procedure for that module. If the stored VIN does not match after setup, replace the module.
  3. If all modules stored VIN match the actual VIN, replace the TDM.
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