2003 Alero pass-lock anti-theft system

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A friend of mine here at work couldn't get his car to start the other night. It would crank fine. Didn't smell anything so thought it wasn't getting fuel. Found info on the net about GM's Pass-lock anti-theft system and so hoping that the code had been lost but that the igniton lock was still good turned key to run for 10 minutes, turned off, waited 30 seconds and car started. It seems to me that the primary cause of this problem is a failing ignition lock. Is there an easy way to confirm this before getting a new one? I found uncommon to me units which include new keys such as: http://www.amazon.com/APDTY-Ignition-Cylinder-Passlock-Dash-Mounted/dp/B00C25GRI0/ref=au_as_r?ie=UTF8&Make=Oldsmobile|51&Model=Alero|566&Year=2003|2003&carId=001&n=15684181&newCar=1&s=automotive&vehicleType=automotive#productDetails
and an AC Delco unit which doesn't include the key, you need to build it so your old key fits: http://www.amazon.com/ACDelco-D1493F-Ign...o+ignition+lock

Anyone with any experience with this? Thanks
 
You didn't say what year or what passlock it is. The early passlocks had a resistor in the key (black insert near head of key), this can get dirty, clean it with alcohol. OR try another key.

The key can also wear out, you need VIN and owner card to get another one made at dealer.

The ignition lock "reader" can also wear out, but it is less common.

Later passlock keys use a "transponder" in key head. Dealers can tell if they are good or bad.

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OH, I see now it is a 2003, it probably has the resistor in the key shank.
 
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It has been a while since I had to work on one with that version of passlock. I don't remember a sensor or resistor being in the lock cylinder itself.
 
My girlfriend's car has a similar passlock issue... it is a 2001 Grand Am - Occasionally, it will have those same symptoms... it will crank but not start, so I have to go through the 'turn key on, wait 10 minutes, turn key back off, then crank' procedure occasionally. Very annoying.

On these, there is no resistor or microchip or anything in the key, no transponder in the key, nothing like that. The passlock system on these is within the lock cylinder. It prevents theft by disabling the fuel delivery system unless it senses that the key is being turned (preventing 'hot wiring'). If the sensor glitches or goes out, it will not detect the key movement and will shut off fuel delivery.

My 2003 Silverado has the same passlock system, but fortunately I haven't had any problems with my ignition cylinder yet.

There is a way to fix it, but I haven't done the research yet. I presume it involves a new lock cylinder and new keys. There is also a way to bypass the passlock system, but it is more expensive and involves parts that are normally only used on remote start kits.
 
Originally Posted By: schuylkill
A friend of mine here at work couldn't get his car to start the other night. It would crank fine. Didn't smell anything so thought it wasn't getting fuel. Found info on the net about GM's Pass-lock anti-theft system and so hoping that the code had been lost but that the igniton lock was still good turned key to run for 10 minutes, turned off, waited 30 seconds and car started. It seems to me that the primary cause of this problem is a failing ignition lock. Is there an easy way to confirm this before getting a new one? I found uncommon to me units which include new keys such as: http://www.amazon.com/APDTY-Ignition-Cylinder-Passlock-Dash-Mounted/dp/B00C25GRI0/ref=au_as_r?ie=UTF8&Make=Oldsmobile|51&Model=Alero|566&Year=2003|2003&carId=001&n=15684181&newCar=1&s=automotive&vehicleType=automotive#productDetails
and an AC Delco unit which doesn't include the key, you need to build it so your old key fits: http://www.amazon.com/ACDelco-D1493F-Ign...o+ignition+lock

Anyone with any experience with this? Thanks


Oy. This was the start of the quagmire that killed my 2004 Chevy Classic way before its time. I hope your friend "just" has a Passlock problem, which can be fixed-for-now by one of several solutions you can find online. In the be-prepared dept.: Please tell him/her to brace for the end of the Olds, unless they love frustration and wasting money.

A: If this is the first time the car refused to start, clean the ignition lock cylinder with contact cleaner, thoroughly. I use the paper stuff that comes in shoe boxes for this, when I can. Works great. Wipe down the key (s) with cleaner, too.

That might be enough to "solve" the Passlock problem for a year or so. No need to spend money on a new cylinder if it only happened once, and there are no other signs of trouble.

B: If you clean the cylinder and the car still refuses to start again in the next few months, replace the lock cylinder. Spend the extra $$$ to get a part with a good warranty; fair chance you will need it. (eBay surfing on price _not_ recommended here.)

C: If you replace the cylinder and the car still refuses to start---especially if it "gurgles" but the anti-theft light does 'not' flash---then dump the car immediately. Trying to fix it beyond that point is more trouble than it's worth. At some point, the Passlock problem leads to the fuel pump not "talking" to the computer, the electronics getting "totally boogered up," as my mechanic put it, (along with some comments I cannot repeat here)....and there is no way out.

D. If you don't believe that and still want to fix the problem even after a new lock cylinder fails to do so, then replace the fuel pump. That might buy you another year---but the problem will return at some point.

E. Do not under any circumstances replace the ECM, or whatever it's called on the Alero. Waste of money, if anything will make things worse---and dealers especially suggest it as a "fix" for the "demon child of Passlock" problem.

Good luck---and good for you that you figured out the 10-minute wait procedure to get the car to start. First time it happened to me, I forget about that---even though I had read it in the owner's manual when I first got the car.

As I said: I hope A or B solves your friend's problem for a year or two---but this has potential to be a real mess. Trust me. It's a shame GM put Passlock with its inevitable problems in solid affordable cars with the great 2.2 Ecotec. I could talk about this heap long time, but this post is already too long.
 
If you don't care about security or dash lights, you can cut the yellow wire when it's running. This triggers a fail safe that disables passlock and also turns on the security dummy light. But it will always start thereafter. I went through this on my BIL's 04 malibu; it is an infamous failure on N-bodies.

You can also plausibly put a resistor on this yellow wire; since it won't be rotating or making contact it will be a rock steady value. It will take another ten minutes to learn but once done will be good and no dummy light. Go forth and find instructions on how to do this.

There is nothing in the key-- no resistor, no transponder. A resistor key is a passKEY, a sensor lock cylinder is a passLOCK. GM muddied this issue through sound-alike marketing. Usually the cheaper cars got passlock, which is great as you can get $2 key copies.
 
This happened to me a month or so ago on my 1999 Alero during a series of wet days. I blame the poorly designed system and the humidity. Has not happened since, but if it does I am putting in a resistor.
 
I would like to buy a beer for everyone that contributed to this thread.
Subject: 93 y.o old mother's 2002 Grand Am. Uses the car sparingly but still wants the freedom to drive for errands.
Six months ago, car wouldn't start. Towed to her mechanic.
Engine not getting gas. Replaced fuel pump.
Two months ago. Car wouldn't start. Towed; needed to be reprogrammed.
One month ago. Yep, towed, mechanic said he needed to do an ABS bypass. Couldn't imagine what ABS had to do with starting but she could drive it again.
Read this thread Thursday.
Yesterday, Mom calls. Car won't start.
I'm a 100 miles away yesterday. Tell her to do the 10 minute relearn. Car starts right up. She thinks I'm a genius.
 
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