Question about 1996 Pontiac Grand Am

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Antitheif system,won't let me start the car. I just installed a new passlock ,and iginition set.what do you think I should do next?

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I had a similar problem after replacing the instrument cluster. I found a couple solutions, but try this.....Now, I assume you mean the car cranks, and then immediately shuts itself off with the theft light blinking??? Leave the key on for 12 minutes after it does that, and then crank the car again WITHOUT turning the key back to off. You may have to do this 3 times before it accepts it as a passlock reset. This works on the one where there is no chip in the key, just a passlock on the ignition cylinder. Mine ran for 2 days after the first time i did this before I had to do it again at the gas pump. I think it happened once more after that, but I've hasd no problem for 6 or 8 months now.

Posted on Apr 27, 2010

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Sounds like it is the ignition switch. You need to purchase a new switch from the dealer and make sure that it is a redesigned one, or at least get their guarantee that the new one will not fail.

There is most likely a build up of grease inside the switch. This is a design flaw with the factory switches, but has apparently been fixed with new switches from the dealer. Like I said, just make sure it is a new one when you are buying it from the dealer. You will need to perform a Passlock Relearn once the new switch is installed.

The old ignition switch will need to be replaced. If you feel like saving yourself some money and do it yourself the follow the instructions below.

1. Remove cover behind the steering wheel
2. Unplug the switch and unscrew the two torx bolts
3. Install new switch by reversing process.

Any time a component in the Passlock system is changed, the learn procedure must be completed for the Theft Deterrent System to sync the password. The procedure requires no special tech tools or computers.

30 Minute Learn Procedure
1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON, vehicle will not start.
3. Observe the SECURITY telltale light, after approximately 10 minutes the telltale light will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes, the vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

Important
The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.

You should be good to go. Good Luck!

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