What you gota do is turn the key to the on position wait 15mins
turn the key to off position then back to the on position wait 15mins
turn key to off position then back to run position wait 15mins
do this 3-times wait 15mins on the third time 15mins is up
turn to the off position then try to start the car should start
SOURCE: Pass key light
That's exactly why it won't start. You can either switch the ingition lock back to the original one so you can use the right key. Or, you can sync the new key with the computer. To do this you or someone else will have to use a gm tech-2 scanner, snap-on modis or an otc genisys scanner. Your local dealer or good repair shop should be able to fix you up. Now, there is another way. The passkey system works on resistance from the chip. In you steering colum there is a 2-wire plug going to the ignition lock. If you pull it out of the colum and cut the plug off. You can pop the chip out of the original key and solder the wires to it. Just make sure you don't heat the chip up to much. After doing this you can use any $10 standard gm ignition lock instead of the expensive ones that use a chipped key.
SOURCE: Car won't start and when I put the key in the ignition the security light starts flashing
Replace ignition lock cylinder. The wires have broken that go to it.
SOURCE: Infl light flashes. car won't start. Just bought car.
mine does the same thing! did you find a solution? it would crank but not start, fixes itself if you let sit for an hour or so
SOURCE: 1993 buick lesabre won't start. security light is
The coded key probably needs to relearn. Turn ignition to crank and release. Let sit in on position (engine off of coarse) for a full 10 min. turn off for 30 sec. and repeat 3 times engine should start. This procedure should take 30 min. so a booster is needed to maintain a full 12 volts. Do not attempt w/out a charger connected;
SOURCE: how to hot wire a 93 buick lesabre
just google how to pass the vats system pass key , or remove the lower panle on the drivers side and look for a orange tube containing two white wires coming down from the steering colum get a ohms meter and and set it to 20 k and check the reading on your key by sticking a probe on each side of the key on the chip and find out the resistance value go to radio shack and by a resistor pack , cut the two wires leading to the fire wall and soulder your resister in between the two white wires you can be with in to points either way on the resister , i did this to put a remote start in my car and works great
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