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P0633 Diagnostic Trouble Code Discussion for August 2011

SKIM Key Not Programmed In PCM

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Trouble Ticket Help Requests for DTC P0633
Help Request Posted
2007 Chevrolet Suburban 1500 LT 5.3L MIL Lamp on, Blinking MIL VIN: 1GNFC16027
P0633: Theft Deterrent Key Not Programmed. ... that steadily flashes with the KOEO. The only code stored in the ECM is a P0633 pertaining to the Security System. We have performed the VTD reprogramming for the keys and module but cannot get the vehicle to crank/spin. W...
August 26, 2011