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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 458 (Immobilizer System) >> Diagnostic Information and Procedures >> OnStar Stolen Vehicle Slowdown Active >> Circuit/System Verification

Circuit/System Verification

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Verify the vehicle is not in the OnStar initiated Stolen Vehicle Slowdown mode. Verify the scan tool ECM Reduced Engine Power History parameter is not Spd Limit Active.