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Theft Deterrent Light Came on While Driving

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Radio, OnStar, Gas and Temp gauge shut off as well.

Got home, turned off car, turned back on and everything was fine. Later in the evening, test drove, and everything worked fine.

Driver front lock assemble not working, so having to lock and unlock front driver door with key.

My first thought, was that the Theft Deterrent, Immobilizer initiated the sequence.

Any thoughts? Thanks in advance.

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Call OnStar and ask them about it. Ask them to read off the OBD codes to you and post them here. If you don't have OnStar, go by an Autozone and get them to read the OBD codes.

-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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