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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC P1649: Immobilizer Security Code Not Programmed >> Repair Instructions

Repair Instructions

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.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for engine control module replacement, programming, and setup.

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