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?
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.
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?
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.
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Re: 2001 Chevy Impala Security System
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:
Damaged or loose/unseated terminals in these BCM
connectors may cause
a security light or no start condition:
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!
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.
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It's the anti-theft system . (SECURITY ) Keeps vehicle from being stolen ! Important: If the wrong ignition key is used in an attempt to start the vehicle, a Data Trouble Code (DTC) will be set and the Body Control Module (BCM) will not send a fuel enable or starter enable message to the Powertrain Control Module (PCM) for three minutes even if the correct ignition is used.
The Pass-Key II?® Theft Deterrent system prevents vehicle theft by disabling the starter motor and fuel system. If the Body Control Module (BCM) dose not identify the use of the correct ignition key to start the vehicle, the (BCM) will communicate a message to the Powertrain Control Module (PCM) which will disable the crank relay and fuel delivery to the engine.
When the (BCM) identifies the use of the correct ignition key (resistor pellet) to start the vehicle, the (BCM) will send a fuel enable and starter enable message to the (PCM) which will allow the vehicle to start.
Your best bet would be have it towed to a qualified repair shop !
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
it could be your security system that locked itself up these cars are bad for that, the way to see is to turn the key on and see if the security light flashes on and off if so it is locked, the way to unlock it is to turn the key to the on position until all the lights come on and let it sit for 10 minutes and then turn the key off for 3 seconds and then it should start. if this doesnt help then it could be the fuel pump. hope this helps.
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
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.
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....!