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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LS >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information And Procedures >> DTC P1649: Immobilizer Security Code Not Programmed >> Conditions for Setting the DTC

Conditions for Setting the DTC

The ECM has not learned a security code.

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