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2000 Alero 3.4 starting problems

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Feb 3, 2013, 12:13 PM

Post #1 of 2 (1020 views)
2000 Alero 3.4 starting problems Sign In

Let me first say that this issue has progressed over the past year and through the use of the internet I have learned many work arounds to get moving. The problem is that I want to sell this POS and explaining these work arounds to potential buyers will not get me a sale. Id like to fix the issue then dump it. Ill try and be brief.
1. I had the security light issue where randomly the security light would blink and id have to wait 10 minutes with the car turned on for it to go out and start. Now the light never blinks
2. Ive replaced 2 starters, a battery, because of this issue I think
3. About 3 months ago instead of a flashing security light, id have nothing and it wouldnt start. Still following general work around rules, id wait 10 mins in the on position, (sometimes much much longer) until the service engine soon light would come on, at which time id hear the fuel pump engage and I could start the car.
4. That issue has progressively gotten worse in terms that I have to wait 30 mins sometimes for this to work
5. Last week at work, waiting for the fuel pump to engage I drained the battery (of course) friend gives jump and still after 30 mins no service engine light, no fuel pump engage.
6. Frustrated I just star jiggling key from off to on and it almost immediately engagea fuel pump. Now I do it everytime and dont have to wait.

Like I said I want to get rid of this thing, but id like to fix it first. Going through virtually every post on the net about alero starting problems, ive had a few leads to fix it, but im looking for thoughts or advice. Passlock? Fuel pump? Computer?

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 3, 2013, 3:04 PM

Post #2 of 2 (974 views)
Re: 2000 Alero 3.4 starting problems Sign In

You could have fixed this a long time ago by replacing the ignition lock and tumbler. You will have to do a 30 minute relearn after replacing the lock. Inspect the sensor wires while the lock is out and make sure they are not damaged at all.


Disconnect the battery and hold the cables together for about 30 seconds then reconnect the cables before performing the procedure.Read it carefully if done incorrectly it won't work.
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
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).
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).
With a scan tool, clear any DTCs if needed (history DTCs will self clear after 100 ignition cycles).

Another option is that you can bypass the sensor altogether although the rest of the system will have to be operational.


If you find the black wire and the yellow wire from the passlock sensor in the column you can solder in a 2.2 K ohm resistor and then attempt to start the car.It will stall don't turn the ignition off.Let the ignition on for ten minutes or until the theft light goes out.Turn the key off for ten seconds then attempt to start the car.If it now runs you have been successful.If it doesn't you either made a mistake or there are other problems besides the ignition lock cylinder.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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