I ust replaced the ignition switch on my 1999 Olds Alero and it still won't start what is with the 1999 Alero i have $500.00 in this car and it still gives nothing but problems

SOURCE: 1999 Olds ignition switch problems

Hi....
In your Intrigue to use the New Passcode sensor .
You need to program the new Passcode to the ECM. of the Vehicle.
This is a prosses that involve around 30 minutes maybe a little more.

Remove the old Ignition switch.
Install the new Ignition switch. with the new Passlock sensor.
Turn the key to on position and try to start a few senconds. them leave the key on run position.
For 10 minutes and NOT more than 11 minutes.
Them turn the key to OFF position for exactly 30 seconds.
Them turn the key to Run position 10 minutes or 11.
them turn back the key to OFF position for 30 seconds.
Them turn the key to Run position 10 minutes or 11,
Turn the key to OFF position and wait 1 minute, them try to start the vehicle.
If the car start you are DONE.
But if Not Letme know to give you more information.

OK I hope this help to try solve your problem.

Thank you for use fixya...

SOURCE: 2003 olds alero igntion/starting problem

i own a 03 alero ... aleros have history of igniton switches going bad... replace it or take it to dealer then ull be charged arm and leg...

SOURCE: 1999 olds alero timing chain

I would not buy that vehicle unless he can prove there is no internal damage to the engine. The repairs on it could exceed the value of the car....

SOURCE: car won't start. lights come on, but won't start

check battery voltage it should be 12.5 voltsmake sure battery cables is clean and tight .if not replace battery have alternator check out make sure it is charging battery.besure to turn off radio before disconnecting battery cables so you wont lose radio code.if battery voltage is good.your starter or solenoid is bad or your car is in theft deterent mode.the dealership have to check it out.

SOURCE: i have a 2001 olds alero, the car wont start and

If the previous solution doesn't work, try this:

While the key is in "on" position and your security light is blinking, it is probably your "Passlock" security device acting up. Very common in these years for GM cars. To test if this is it, simply turn your key forward (to "on" position) until light stops blinking and eventually turns off (right around 10 minutes). Then, turn key back off, and then try to restart it. My Alero did this just a few months ago and I learned this trick as I was pricing out a new fuel pump. If this was your problem, I recommend taking it to a remote starter installer and have them by-pass the passlock system permanently. This should cost anywhere from $40-$100, but is much better than a new fuel pump and filter cost.
-note: I recommend not getting it by-passed until it happens a second time (which it may not), just don't forget the temporary fix!