Question about 2000 GMC Yukon

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I too have a 2000 Yukon and the anti theft system will not allow it to start at times. This happens 4-5 times a month and, I have noticed that, each time it happens, after waiting 10 minutes, the car

I guess I am looking for a way to dignose the problem without having to give up the vehicle while waitng for the problem to occur. I was able to have it diagnosed originally when picking up my Yukon after having an unrelated problem fixed...I was trying to start the car to leave my mechanics shop when it occured and he was able to hook up his diagnostic equipment to determine it was the anti theft system.

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Your passlock system is failing. If your key has the resistor pellet with the short wire on both sides of the shank, I can provide a bypass procedure. You will need an ohmmeter, some resistors you can get at radio shack, and a soldering iron. I do not recommend trying to repair the system--bypass is much easier. Let me know if you want the bypass procedure...

Posted on Jul 30, 2017


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Posted on Jan 02, 2017

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SOURCE: Truck won't start

the ignition baril that contain the chip for the theft system is defectif just change the baril our trouble gonna be gone cheers pierre

Posted on Jun 28, 2008

  • 1 Answer

SOURCE: 99 yukon radio problem

If you have the BOSE system, you will have to check the power amplifier which is, unfortunately, buried under the center console. You can only get to it by removing the entire console and turning it upside down. It is located directly under the the stowage area. There are 4 torx head screws that secure it and 2 connectors toward the front. My guess would be that there is a fault in it or possibly a shorted speaker wire somewhere. To remove the console, you need to remove the top (screws located under the cup holder areas) and slide it about 1.5 inches rearward. the console also has 2 large cables that plug into the console which need to be disconnected and un-clipped from the restraint clips. Once you get to the power amp, you can open it to look for obvious signs of damage (if you are electronically inclined) or get one from a bone yard to use as a test. Good luck!

Posted on Mar 25, 2009

  • 14036 Answers

SOURCE: 1996 yukon turns over but no start,have spark and


Posted on Sep 09, 2009

  • 3854 Answers

SOURCE: I have a VERY intermitent/passlock - no start

Common for the ignition lock switch it self has gone bad and will need to be replaced. This is more common if you have lots of keys on your your key chain, the extra weigh wear out the electrical sleeves in the cylinder walls making the passlock not to read the proper resistor reading on your ignition keys and needs to be reset all the time. My In-Laws had the same problem with there Grans Am and was at the deal once a year for it. Once the warranty ended I got the passlock 2 by pass for around $70.00. The factor alarm still works but the ignition immobilize was disabled so they would not get stranded out in the cold. Here is the link and good luck, keep me posted and it's just a plug and play so there is not wire cutting and splicing. Keep me posted and don't forget the rate.

Posted on Jan 07, 2010

Testimonial: "Did you have to be a serious tech head to install this passlock bypass?"

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SOURCE: I have a 2000 Yukon

According to my lists, 2000 Yukon has a Passlock 2 anti theft security system. This means that the key literally has a transponder in it that sends a radio signal to the ignition. The ignition/lock cylinder then sends a signal to the TDM (theft deterrent module) which then reads the signal and allows your truck to start. If there are any communication breaks, the truck thinks its being stolen and goes into anti theft.... Read up on this link. There might be an option for you.

Posted on May 05, 2011

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Is the security light lit ? Car an pad lock symbol . If any of these are lit it is the anti-theft system . Does the engine crank over but won't start an run ? The anti-theft system will allow the engine to crank but not start , disables fuel injectors . If the anti-theft light is lit there are DTC'S diagnostic trouble codes stored in the theft deterrent module an or the ECM .
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Hello Jose:
That's a really wide open question to answer without giving guesses for about 10 different possible problems.
If you try to identify some specifics we should be able to help you.
Could you give us make, model, and year? Is this a one time situation, and the vehicle is now dead?
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Starter Voltage Drop
How to voltage drop test starter motor circuit

And what's this identity anti theft system ? No such thing ! The vehicle has a content theft an vehicle theft deterrent system !
This system disables fuel not cranking of the engine. The VCM/PCM will not disable the fuel due to any BCM message for the remainder of the ignition cycle.
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way to be escorted off the property

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