Question about 2001 Chevrolet Impala

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2001 Chevy Impala Security System

My 2001 Impala does not start and the security light comes on even though we are using the correct key. Is there any way we can disable the security system wiring so we do not have to get a new ignition cylinder and where can I get the wiring diagrams on the internet so I do not have to purchase a repair manual?

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  • lashaundra ellison May 17, 2008

    I have the same exact problem. My car will not start for exactly ten minutes and th security light is flashing. I never know when this will happen but once it starts, the car runs like a champ. I have taken the car to the dealer and had the ignition fixed but that is not the problem. help!!

  • Anonymous Jun 26, 2008

    I have the exact same problem. Sometimes it will go for months with no problem then as your driving the yellow security light comes on and you know that once you shut the car off it will not start. I have tried using the remote lock and double clicking it twice and that seemed to work but then that stopped working. I will try clicking it three times. This is a very common problem with GM but they bury their head and ignore the problem.I will probably never buy another GM car.

  • Anonymous Jul 24, 2008

    We have the same problem with the car not starting sometimes. If we leave it exactly ten minutes it seems to start. If we try to start the car now in the ten minute period it will not start for another 10 minutes. I hope someone finds the solution. Someone told us to disarm the timer off the security system however we need a wiring diagram for this mechanic. Does anyone know where we can find a wiring diagram?

  • hurth08 Nov 02, 2008




    I have the exact same problem my 01 impala has done this for years. Security light comes on for a couple of days and one day out of the blue it wont start for about 15 min.


  • Anonymous Mar 04, 2009

    i have a 2000 olds alero, and a 1998 sierra 5.7 l, security lights up, at times won t start, how to remove system?

  • Angela Apr 29, 2012

    2001 Chevrolet Impala starts in the morning but wont start in the evening, interior lights wont come on, radio wont come on, door locks wont work, next morning vehicle starts on a dime- We think its the security system- how do we disengage the security system?
    Angie at amtlogsdon@live.com Thank You!!

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I have a 2001 Impala. My security light will flash and sometimes the car won't start. My dad told me turn the key to the start position, place your foot on the break, put your car in the last gear it was in (D, R, or N). Then shift all the way back into park. Make sure you shift all the way into park. Take your foot off the break. Then turn ignition back to off. Your car should then start right up. He said the sensor still thinks the car is in D, R, or N although it's in park. So it confuses the system and it doesn't start because it doesn't know which function to do. It pretty much locks up. I'm pos. this will work. My car does it every few months. Hope this helps.

Posted on Oct 05, 2009

  • rebel69now Dec 02, 2010

    I was told if you turn the key off and on 3 times leaving it on the 3rd time letting it sit for ten minutes
    will reset the computer and car will crank.I had to turn ignition back on press brake pull shifter down to low and back to park 2 times quickly and car started right up.My mechanic says ignition needs replaced cost 340.00 said it was a common problem,said he replaces them often.
    R.V.L. / WALKERTOWN,N.C.

  • TJ Jones
    TJ Jones Apr 20, 2014

    I just did this and it worked. Now time to get rid of a Chevy!

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I had the exact same problem for 4 long years but I did find the solution so it will NEVER happen again. Put shifter in neutral, get out, push vehicle 10 feet forward, That's it! Oh...make sure you are at the edge of a 100 foot, or more, cliff. I swear to you, you will never have this problem again with this vehicle. GM should have recalled this years ago but does that surprise anyone?

Posted on Oct 31, 2009

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Try clicking the LOCK button on the key fob THREE times, letting the car sit for a minute or two then UNLOCK and try to start.

Posted on May 28, 2008

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Mine did the same thing and what i had to do was go in through the settings area of the radio and choose the "RESET FOB" selection tried it and it worked perfectly...hope this helps

Posted on Jul 16, 2008

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I am a prior Law Enforcement Officer and I had a 2003 impala for a police cruiser and I had the exact same problem. I will tell you what worked for me and you are not going to believe it but it did work. The next time you notice the problem, look over and see if you left the AC switch on. If it is on turn it off and then try to restart it. I dont know what it is but when my cruiser did it all you had to do was turn off the AC and it would start EVERY TIME!!!!!!!!!!!!!!!!! Hope this helps.

Posted on Jul 25, 2008

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Www.newrockies.com
They sell a passlock bypass that is relatively easy to install....about 4 wires that will stop that problem. My 2001 Impala has been ok since I installed this bypass.

Posted on Jan 31, 2012

  • Angel Williams Jun 07, 2013

    where did you buy it?

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  • 58 Answers

Some customers may comment on an engine that will not crank. Others may comment on the security light being on. Technicians may find DTCs (diagnostic trouble codes) B2958 and/or B2960.
The following are the likely causes of these conditions:

  1. Damaged or loose/unseated terminals in these BCM
  2. connectors may cause a security light or no start condition:
• BCM connector C1 (24-way, pink in color), term
inal B9 (white wire, circuit 1459) • BCM connector C1 (24-way, pink in color), terminal B12 (black wire, circuit 1835) • BCM connector C2 (24-way, grey in color), terminal A3 (yellow wire, circuit 1836)

Posted on Nov 01, 2009

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I am a gm tech, i have been working for gm for 19 years. trust me, you need to replace your ignition cylinder, this will include the "passlock" sensor. you can replace it while the car is running. if you pull off the black cover around the igniton cylinder with a small pick, you then can push a release tab to remove the cyinder while its running. if you do it this way the vehicle will relearn the new pass code. if not you will have to have it programmed. also when you buy it the cylinder, you will need to get it at a gm dealership, you will also have to have the new cylinder coded to your key. good luck!

Posted on Dec 23, 2008

  • dedricp Nov 29, 2010

    How do you make the passlock sensor program. it want start at all! i turn my key to on it blinks tha brake light, mileage,battery logo,airbag logo and check engine light. i already replaced the ignition what do i do now ?

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I had this problem for years on my `01 Impala, the car was at the dealers more than home. The problem is with the pass lock security system, you take out the key and when you put it back the security system says the wroung key. What I did was to take the key off the key ring with clicker on chain and leave the key in ignition. This has solved my problem for 6 or 7 months now. You use your clicker to lock and unlock your doors and never remove the key. Yes some one might steal it but, as I told my wife, we have insurance and would be better off if it was stolen.

Posted on Nov 08, 2008

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Buick century 3.1 2000 security light staying on car wont crank what can that be


It's the anti-theft system . (SECURITY ) Keeps vehicle from being stolen !
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Security light comes on after driving for awhile no codes in bcm already replaced lock cyl. was coming on right away i am thinking a bad bcm


The communication between the key, the ignition lock cylinder and the BCM or TDM is key to the antitheft system working correctly. If there is any break or miscommunication for even a second, the security light will come on and possibly disable your vehicle. All too often when the security light is addressed, the first thought is to change out the igniton when more often than not the BCM or TDM computer is the problem. I have found that while fixing the system is ideal, bypassing the system is more cost effective and permanent. This system is known to fail and fixing a failed system is pointless in my eyes. Here is a link that explains the system and offers solutions that you can perform to fix this yourself

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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Turns over but not starting is there a kill switch on 2001 impala


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Jan 08, 2011 | 2001 Chevrolet Impala

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How do i reset the passlock system for the chevy impala 2001....i want to turn the damn security system off!!!!


Turn the key on, don't try to start it, let it set on for ten minutes turn it off. do this three times, after the third time your will start. Make sure you have everything else turned off. and if your lights are automatic with the key on, you will have to put a charger on the battery as you do it. because 30 minutes with the lights on will drain your battery. Also you can not disable the security system

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2001 chevy impala the battery/security light comes on, then the car won't start, the door locks, radio, remote, air conditioning won't cool what could be wrong with it?


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Apr 16, 2010 | 2001 Chevrolet Impala

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2001 chevy impala security light keeps coming on


This is a problem with chevy vehicles that have the system theft light. after a couple of years of using the key, the lock tumblers inside the ignition switch tend to wear out and so causing the system to think it's being stolen. Now you have to put the key in and turn the ignition to the on position, without cranking the car and leave it for 10 minutes until the theft light goes out. Very annoying especially if you're in a hurry. The dealer cost to repair the ignition switch goes for about $600-$800. that includes re-teaching the key.

Feb 11, 2010 | 2001 Chevrolet Impala

1 Answer

Wait 15 minutes to start.


Impalas and some other Chevy products have a system called passlock or passlock II At times they will "sense" an intrusion even if there isn't one (even if you are using your keys). At that point the system locks down the fuel injectors and the car won't start even though everything else seems to work. You can do the same **** that you are talking about, turn the key in the ignition and leave in the ON position 10-15 minutes but who wants to do that all the time, and this always seems to happen at the worst time. If you take it to a dealer they are in most cases prohibited from making changes to factory installed protection systems....SO.....what I did on my Impala was...to disable that portion of it. This will take an hour or two. The dash is held in place with a variety of screws and bolts and you may want to do a web search to determine the placement of them. I just took my time and found mine until I had the dash removed. Under the steering column there is a metal plate that also needs to be removed, held in place with a few bolts. Once that is removed you will see coming up the steering column (3) wires grouped together. They may be tied together or taped together but there should be three. One is gray, one is yellow and I beleive the other is white. The yellow one is the only one you need to concern yourself with for this problem. Make sure that you have electrical tape or something to seal the ends off with (have it with you ahead of time, also wire cutting snips or something similar. This is VERY important. Once you have located this group of wires, START THE CAR, and snip the yellow wire while the car is running. Make sure and do not touch the ends to anything metal and try to seal them off with electrical tape as soon as possible. After that put everything back in place and you are good to go. The Security light will stay illuminated but it is not a problem. You can take the bulb out but it is very complicated and not worth the trouble. When I say security light it is the light to the right side of your control panel and it is either orange or yellow and says SECURITY> the alarm and everything else will function just fine. I did this to my Impala 10 months ago and have never had the not starting problem ever again. For more info on the grouping of wires going up the steering column you can go to a website called BulldogSecurity.com and they have more detailed info...Hope this helps you....!

Dec 17, 2008 | 2002 Chevrolet Impala

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