Question about 2001 Chevrolet Monte Carlo

11 Answers

2001 monte carlo ss has been to the dealer so many times under warranty it is not funny for the security light and no start. now in the mornings the light stays off but in the heat of the afternoon it comes on and once in a while the starter will not work. I have installed an a/c delco starter. the dealer has supposedly replaced the security system twice, the ign switch twice. still doing it help

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  • 9 more comments 
  • bigdog30919 Jul 22, 2009

    tried of guess work give something sound please I have enough headaches and nightmares with this car

  • bigdog30919 Jul 22, 2009

    no more bs answers david

  • bigdog30919 Jul 22, 2009

    cylinder lock assem. has been replaced twice by the dealer next

  • bigdog30919 Jul 22, 2009

    thanks have tried that did not help

  • bigdog30919 Jul 22, 2009

    tried it thanks

  • bigdog30919 Jul 22, 2009

    been replaced twice thanks

  • bigdog30919 Jul 23, 2009

    I do apologize for not saying this up front, but I wanted to know everything everybody has tried, and what they found.
    The rest of the story
    I own a repair shop, have been turning wrenches for 38 yrs. and I have the latest update for my snap-on brick with OBD 2 and the Can with all the bells and whistles.
    The ss belongs to my honey who has taken it to the dealership 7 times under warranty. They have supposedly according to the R O s replace the ign sw assem twice and reprogram it each time with new keys. The same with the body module twice, the same with ecu twice. Now it is out of warranty, and she has become my Honey, I have cleaned and Die-Electric every wire connection, cleaned every ground under the hood, behind the dash, in the trunk, and under the car. I have had the ECU checked, and checked for the latest updates at two different reliable places. When it fails to start I have no voltage at the enticer wire on the starter, the dash lights up, and the security light is on. The door lock trick works, the 10 min. trick works, and the leave it a lone for a while works.I have replaced the IGN sw with keys and reprogrammed it with my scanner and by going into the radio mode. No codes, no nothing showing up everything is supposed to be working and with in variables.

    Any more suggestions ?

  • bigdog30919 Jul 23, 2009

    try again

  • bigdog30919 Jul 23, 2009

    thanks guy

  • bigdog30919 Jul 23, 2009

    what model or which one just to bypass the damn key, and where did you get the price ?
    2001 Monte Carlo ss Dale Earnhardt edition

  • bigdog30919 Jul 27, 2009

    yes yes yes

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11 Answers

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  • Master
  • 1,615 Answers

These cars are junk. They always have electrical issues. If the dealer can't figure it out noone here is going to have the answer. We would just be guessing at your expence. Your going to have to find a shop that can spend alot of time on it. And you may have to leave it with them for a couple weeks so they can work on it in their free time. Otherwise if you put the shop under the gun to get it back to you right away they could charge you actual time rather than less . Once you get this fixed get rid of the car. Some cars are just lemons.

Posted on Jul 27, 2009

  • Ernset ( Skip ) Bouvette

    I just searched IATN and it seems like most issues like this for this car have been fixed by replacing the BCM.

  • Ernset ( Skip ) Bouvette

    I see you stated you have a Brick. You are aware that even with all the updates and the CAN cable that this is still a dinasour. I know. I have one also. We also at work went thru the Solus and the Modis.. The brick does'nt even compare. Alot of these newer cars will be hard to diagnose with such a slow baud rate..



    And by the way, Sorry about the remark about your car. Lemons are good for you. Your experience to fix it will give you great knowledge. ;-)

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  • Master
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Just wanted to ask a dumb question has the door switchs been tested and the lock switchs been tested?

Posted on Jul 27, 2009

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  • Master
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AN ALL FAMOUS ANTI-THEFT! This is a problem with all GM vehicles. Inside the security system when then ignition key goes in, there is a magnetic trigger that is supposed to turn off the anti-theft system, but the computer never registers the keychip properly. The anti-theft device is called a PASSLOCK. You by bypass this system very easily with cheap priced product called I suggest the PLJX bypass kit to get around this issue. It even comes with instructions and is only about $10. You will never have the anti-theft problem again.

Posted on Jul 23, 2009

  • Nate Stansfield
    Nate Stansfield Jul 23, 2009

    2000 and newer have the Passlock 2 circuit 99 and older have the VATS system

    They have them all over ebay and other sites.


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  • Master
  • 1,129 Answers

I would aquire a cd service manual on ebay motors these mitchel software manuals have all the latest tech bulletins an recalls which the dealer however unlikely may be missing, hey for $15.00 - $20.00 it's worth a try there are some very usful schematics and electical component locator tools on these mitchel cd's as well. I personally have nothing but contempt for these engineers whom complicat the **** out of these electrical systems making it nearly impossible for the dealer to repair them never mind the independant repair shop.

Good luck

Posted on Jul 23, 2009

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  • Chevrolet Master
  • 2,359 Answers

Is there an ultrasonic dome sensor in the Monte?

This is a false alarm trigger in the system.


door switches

ultrasonic sensor

open the hood,and check for a pin switch (part of the alarm system) Make sure it's clean and lock on to the frame nicely.

trunk sensor (also a pin switch but it's not metal)

shock sensor

====

The alarm module can be bad.

====

The cheapest item is this setup is a starter disable relay. It can go bad also.

====
Google GM Passkey II or VATS. You will see has the same problem.

Try your second spare key when the problem surface.


Do a quick check on the under hood wires and under dash wirings.


I will follow up on this post later, Please keep me up to day.



Posted on Jul 22, 2009

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  • Chevrolet Master
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HAS THE IGNITION KEY CYLINDER BEEN REPLACED? THIS IS WHERE I WOULD LOOK TO CORRECT THIS PASS LOCK SYSTEM FAULT. THIS SYSTEM USES A TRANSPONDER KEY THAT SENDS A SIGNAL TO THE MODULE THAT THE CORRECT KEY IS IN THE IGNITION, THIS IS A KNOWN PROBLEM AREA ON 1999 UP GM PASS LOCK SECURITY SYSTEMS.

Posted on Jul 22, 2009

  • yadayada
    yadayada Jul 22, 2009

    WHY DON'T U MENTION THE PARTS THAT HAVE BEEEN REPLACED SO I DON'T WASTE MY TIME AND YOURS.

  • yadayada
    yadayada Jul 22, 2009

    WHERE U GIVEN NEW KEYS WITH THIS SWITCH? YOU DON'T SAY. YOU SAW THE INVOICE FOR THE NEW PARTS?

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  • Master
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I had the same problem and it was a loose connector located behind the side kick on the passenger floorboard,Once the kick panel is removed just under the carpet you will see a bundle of wires and connectors,Check all of the connectors and look for bar wires as well.

Hope this help you.

Posted on Jul 22, 2009

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  • Chevrolet Master
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Sorry my friend, my in-laws had the same problem with there Grand Am and the problem is the tech who does the repair to the system. The ignition cylinder is delicate and the wire harness at the steering shaft may also be damaged. It took the In-laws four trips to the dealer before they got the car running and it was only good for three years and it happened again. I fixed the problem since the warranty is now over and was gong to cost more for the repair then the cost of the car to replace, since it's a 2004 Grand Am GT. Told the In-law's i'll fix the car as long as they pay for my air flight to Newfound Land Canada, LOL.   Here is wat i did. log on to www.passlock2.com  You can purchase a bypass module for the passlock ignition system, there is no wire cutting, just plug and play. The security system still works, just minus the resistor base passlock. The alarm will still go off if someone breaks in, so no worries. 
Good luck and hope this helps. Keep me posted, be glad to answer any questions you may have. 

Posted on Jul 22, 2009

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  • Master
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Alright I have seen this issue a few times where if you go to start it and it won't start, the security light will flash. If this happens, leave the key turned to "on" for 10 minutes (until it quits flashing), turn off then start.

You'll need a new passlock/ignition cylinder to fix the problem. I'm sorry you've had so many problems with this car along with many owners. At least its a smaller problem. Let me know how replacing the ignition cylinder turns out.



Benjamin

Posted on Jul 22, 2009

  • Benjamin Patri
    Benjamin Patri Jul 22, 2009

    You can try this relearn procedure.

    30 Minute Re-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, after approximately 10 minutes the telltale will turn OFF.
    4. Turn OFF the ignition, and wait 5 seconds.
    5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes ( the vehicle is now ready to relearn the PasslockTM Sensor Data Code and/or passwords on the next ignition switch
    transition from OFF to CRANK).
    Important

    The vehicle learns the PasslockTM 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.
    6. Start the engine (the vehicle has now learned the PasslockTM Sensor Data Code and/or password).
    7. With a scan tool, clear any DTCs if desired (history DTCs will self clear after 100 ignition cycles).


    Let me know how it goes.


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  • Chevrolet Master
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HotChevy has the answer in a post and solution that appears below yours under related posts. What you may also want to try is to heat up individual component modules under the hood and dash with a hair dryer to see if you can duplicate the no-start condition when the car is cold and normally starts.
I know you want "solid answers" unfortunately, the best place to get those answers should be at a dealer, as they have the proper test equipment and information at hand, therefore are (or should be) able to do the kind of testing that I, nor anyone else can online. The hairdryer idea seems a bit "backyard" but I have used that numerous times (and the inverse, spraying freon on parts) to isolate a component that has problems when hot...Otherwise, when everything is hot, you cannot differentiate between whats OK and whats not. Hope this helps a bit.

Posted on Jul 22, 2009

  • Richard Scordino Jul 22, 2009

    Ya know, when I saw this was on the "pay" side I nearly didn't answer at all (didn't answer for the money, just to help)..but what I gave you is valid and has worked before. If you are looking for a magic answer, there is none. In doing electronics diagnosis, the only way to get there from here is by hands on testing, sometimes it takes a few minutes, sometimes it can take days. I've spent countless hours on top of a hot engine or screwed up in knots under a dashboard, If there was an easier way I'd love to tell you what it is!!! Good Luck

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  • Master
  • 1,341 Answers

It seems you are having problem with the immobiliser here, has it gone one? This is quite complicated and may be costly to fix,be very careful here.It might need ECU update or re-mapping etc.

Posted on Jul 22, 2009

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