Trying to bypass security on 99 old alero, car will not crank first for me to cut the yellow wire.

SOURCE: Security light in 99 Oldsmobile Alero

There isnt a fuse for the theft system. You need to take the coloum cover off. Should be 3 screws and you will see all the wires in there. The ones you need are three togather. White Black and Yellow. Get the car started and cut the yellow wire. The theft light will come on and stay on but will bypass the theft system. If it is a 2 wire system you will see two little metal strips on the upper side of the key. You have to use a ohm meter and measure the resistance of the strip in there. Its a resistor used to tell the theft computer the key is in there. Anyway find out what the resistance is and buy a resistor from radio shack and look under the steering wheel for the 2 very small guage wires in a yellow cover....NOTE not the air bag wires. Simply cut those wires ( the 2 white ones) and on the set going away from the steering wheel strip the wires and put the resistor one one wire and the other end of it to the other wire....That will disable that system. If its the 2 wire and you have issues getting it simply take the car to a car audio place that does remote starts and for a nominal fee they will do it for you. My records show that it has the 3 wire system.

SOURCE: passlock

While I've never had this issue, the fix is pretty easy:

1. Turn car to ON position (without starting it)
2. Leave in that position for 15-20 minutes
3. Turn off.
4. Start car.
   

SOURCE: 99 OLDS ALERO 2.4 IDLING PROBLEM

intake manifold has a vacum leak or other vacum leak hose etc.

SOURCE: license plate bulb 99 alero

remove the 2 license lamp screws from outside,above the lic.plate then from insidethe trunk pull up the lic.lamp housing and replace the bulb.it should pull straight out

SOURCE: 99 Alero Passlock and starting problem

YOU CANT BYPASS PASS KEY ANTI THEFT SECURITY SYSTEM.ITS PART OF THE PCM.IT WAS MADE WITH CAR.THATS WHY YOUR CAR NOT CRANKING.THE SECURITY THEFT SYSTEM SHUT DOWN FUEL SYSTEM.THE DEALERSHIP HAS TO FIX. IF YOUR IGNITION SWITCH KEY CYLINDER LOCK OR KEYS ALSO THE BCM FAULTY.THE DEALERSHIP HAS TO REPLACE FIX THEM AND REPROGRAM TO PCM IN ORDER FOR CAR TO CRANK.