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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 P1631 (without RPO Y41) >> DTC Descriptor

DTC Descriptor

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.
DTC P1631

Theft Deterrent Fuel Enable Signal Not Correct

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