petermc

Ok, without wanting to repeat NUMEROUS Threads with this problem - does anybody know what is likely wrong with the PassLock system.

I have a 04 3.4L and 2 weeks ago the Security Light came on solid while driving. When i restarted no problem. Then 2 weeks later car will not start - not turn over - nothing. Security Light blinking.

Thankfully I had studied this site and learned the 10 min technique to reset the system, but by the sounds of it this will be re-occurring. The car is fine for now.

I read about the disable (snip yellow wire) but does anybody now how to fix the problem. I've read many, many threads but they all fall back to disabling the system. Is it the key, is it the locking mechanism or is it the BCM (whatever that is). Can I spray something in and clean? Would this be covered by warranty (<5years and < 100,000km)?

Any help greatly appreciated. Thanks.

jlc55

i have same problem..2003 alero 4 cyl. sometimes will start perfectly and then suddenly the car will crank but will not start...sometimes a security light comes on while driving but ran ok...then for about a week later car wouldnt start so i had to reset the key for about 30 min. then will turn off key and then crank the car and it will start on right away...any tips on what this can be will be appreciated....thx

Iflylow

BCM=Body Control Module. It is the computer that handles door locks, Passlock, radio, lights etc.
Your problem is likely not covered, but check with your dealer, and press them a little, since this is a very common GM issue.
Typical caused include worn keys, worn ignition cylinders, and sometimes BCM problems. Usually if the BCM is bad, you will have other symptoms as well as Passlock.
Some people have said that heavy keychains will trigger Passlock problems, as the ignition cylinder is very sensitive to the weight hanging from it.
I have used this fix: http://www.automotiveforums.com/vbul...asslock+bypass
It only took about an hour, and has worked flawlessly for over a year now. It was not as hard as it sounds, either.
If you don't want to do that, try using your least worn key, sometimes that will work for a while. If that does work for you, get a few copies of the key made before you wear it down too far. Also, that is only a temporary fix, because eventually you will wear the cylinder down, and even a brand new key will not work. Disabling the system is the best way to go, in my opinion.
Here is some more info: http://www.oldsmobileforum.com/forum...?TID=1225&PN=1
Hope this helps you.

debillthornburg

Our car, all of the sudden, doesn't start after pulling it out of the garage only 30 minutes before. This 10 minute technique worked!! The security light did go off after 10 minutes and what do you know, the car started!! Thanks very much for the info.