Question about Buick LeSabre
You have a problem with the anti-theft system and it doesn`t recognize the key being used.you will have to have the key programed into the computer if it has a chip in the key.if it is a key normally used then the wires for the anti-theft system in the ignition switch have possibly broken.they are two small white wires and is a common problem as they move around in the area and there is not much play in them.
Posted on Apr 08, 2011
GM uses a Passlock system, it reads the resistance of the chip in the key. If you had a key made from anywhere but the dealer, you need to get a new one made. They put your key in a test box and then they know what blank to use. It is also a known issue that the contacts in the ingition switch that reads that chip can go bad.
If all else fails, and this depends on the year, there is a relay in the drivers side kick pad that closes when the Passkey system is satisfied. In the past I was able to sucessfully jump out the relay to get the car to start. The downside is the security light stays ON.
Another possible solution, guys who install remote starters know how to cut in and install a resistor on top of the steering column to eliminate this. It is sometimes needed to allow the remote starter to work since there is no key in the ignition at the time. I suggest looking up a site called www.the12volt.com. There are many install experts that post on that site and there is a wiring diagram database that may do you some good.
Posted on Apr 08, 2011
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Posted on Jan 02, 2017
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