SOURCE: my 2004 cadillac cts says service anti theft
you have a low voltage problem. either a bad battery or a brake in a wire somewhere. My sister had the same problem in her car. Had it to the gm dealer 3 times they couldnt figure it out. I put a new battery in, new wire from batter to starter, and a new altenater and wires to it. just by dumb luck i noticed the (+) wire from the bat to the fuse box under the hood was broke at the fuse box. Put new wire on it and 2.5 years later no problems.
SOURCE: HOW DO I TURN OFF ANTI-THEFT LIGHT ON MY 2004 CADILLAC CTS 3.6L???
You will need to go and get your KEY SYNC'd to your Car's Immobilizer... Try using your other Key and see if that one works. IF neither one does... Then you may have lost the code or your Immobilizer went bad.
SOURCE: how to reset an anti theft system on a Cadillac cts
Bypass the starter relay and crank while the key is in the on position. This is to force the ecu to communicate. After doing that and making sure the check engine is on you can do the 30 minute key program procedure. Make sure the battery always stays above 12 volts
The key stuck in the ignition is either a bad lock cylinder or more than likely a bad ECM. I have the same problem but replaced the lock cylinder and new key, that changed nothing. If your Anti Theft light is on and traction control, no gas gauge nor temp gauge, ECM. More and more will quit working or go crazy in time until there is no power anywhere
SOURCE: What could cause anti theft system light come on on a 2007 cadillac cts
Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
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the lamp glows key on to tell you Im alive and that im ok booting up. but then goes out to start car.485 views
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