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rpmdiag, Tech and Instructor
Category: Buick
Satisfied Customers: 7871
Experience:  Since 1975
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I have a 2000 Buick LeSabre. The security light is on as

Customer Question

I have a 2000 Buick LeSabre. The security light is on as soon as I turn the key and never goes out. The vehicle will not start. If I turn the key to start the lights in the dash go out as expected but the engine will not crank and does absolutely nothing. No noises, no relay clicking, or anything. This vehicle has a Passkey 3 system.
The vehicle is not worth enough to justify taking it to the dealership and paying in excess of $800 to have it repaired. I am looking for a way to either easily repair it or bypass the TDM.
Submitted: 1 year ago.
Category: Buick
Expert:  rpmdiag replied 1 year ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

I attached the procedure for you to fix the security issue you have.

Thanks, Ron

Customer: replied 1 year ago.
I read through the article you have provided. I have already tried the relearn procedure outlined multiple times. As stated in the article I waited 10 minutes and the security light never went off. I still followed the procedure waiting 10 minutes after each cycle but the procedure did not work. I have also left the key in run for over an hour and the security light never goes off.
Is there a way to bypass this system so that the vehicle can start?
Expert:  rpmdiag replied 1 year ago.

It can't be bypassed, if this procedure didn't work,then a scan tool is needed to find the problem.

Thanks again and please remember to rate me and keep this link in case you need me again later on.