I have had my 2003, 3.4, sedan style Impala since 2006. Every once in a while the SECURITY light comes on but the car is running fine (it will come on while I'm driving). I can shut the car off and turn it back over and the light will disappear. It had only come on a hand ful of times, since I have had it, but there appears to be nothing wrong while the vehicle is running. Any ideas on why this is occuring?
Disable the passlock permanently. It is not as hard as it seems. The dash assembly comes out easily and underneath the steering column there is a metal plate held in with some bolts that needs to come off. Once you get the bolt off there will be (3) wires running up the column (yellow, black and white) these will be tied or taped together. They are the only group of three coming up the steering column. START the car (vital to do this) and while the car is running snip the yellow wire in two. Tape the ends and put everything back together. Problem solved. I did this 10 months ago and have never had the problem again. I did 3 months of research finding out what a sorry system the Passlock is. The security orange or yellow dashlight will stay on but this does not affect anything.
I had the same problem and i had to have the whole security system replaced. it started off just the same way with just a light then maybe a year or less later my vehicle refused to start once i saw the light come on and i would have to sit with the key in the ON position for 10 minutes until the security reset itself. i suggest you take it to a chevy dealership and get it looked at. although there are plenty of people who have/had the same exact problem chevy will not cover it under warranty. cost me about 800 bucks to get fixed so i suggest you catch it early maybe there will be a quicker/cheaper fix for you.
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Nov 26, 2012 - Uploaded by Artome001
Chevy Impala, 2008, does not crank or start. ... 2003-2007 Chevrolet/GMC Silverado/Sierra No Start/no crank/electrical issue FIX - Duration: ...
Does the "security" light come on? It may be an issue with the GM Passlock anti-theft system. There is tons of information on repairing the GM Passlock problems. Just search for "2003 Passlock issues."
I was told u cant bypass security light - it may be a broken wire or a wire came off starter or it could be the key switch - mine would do that - leave key in the ignition (may have to leave ignition on) for any where from 11 - 30 minutes and see if it starts then - if it does I had to have the ignition replaced and there is a recall on those for that - it costed me $605 to get it fixed - waiting to here back from Chevy about getting reimbursed for it!
If the security light has come on, that is indicating a problem in the antitheft system. Tho it may be intermittent right now, it can only get worse. Read thru this link, it will help you understand the problem, offer some tips and tricks, and show you some ways to bypass and fix it.
That indicates there is a pass-code error. There are a few reasons why. Easiest way to explain it, is that your key has a "chip" in it, with a resistance or "password" that your cars computer is looking for. It means that your cars computer did not see the right password. It will probably reset itself once it sees the correct password a few times. If not, you want to get it checked, because if it happens too often, the vehicle will not start.
The causes for this problem on these vehicles are generally the ignition switch or passlock sensor. There is also sometimes a water leak that occurs at the right front cowl, check the inside passenger side floor area, if it is wet. It could then be a BCM problem. Goodluck
Looks like the TDM in the security system (VATS/PassKey) is having problems, it's typical on those cars and it can get worse till the car wont start anymore. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.
Are you reffering to the alarm or the pass lock system that put the theft light on.....If its the alarm the put the key in the door and unlock it. If its the pass lock system put the key in the ignition and turn it on and try to start the vehicle. After it shuts itself off leave the key on for ten min until the theft light stops flashing the turn key off and try to start it again. This may take a few times....
Add Duplicate Key (PK3 or PK3+ key)
1. Insert an existing key into the ignition cylinder. 2. Turn the ignition cylinder to ON (RUN) and back to OFF. 3. Remove the existing key and, within fifteen seconds, insert the new key and turn it to ON (RUN). 4. The security light will light up for two seconds to indicate success in programming the key into the vehicle. Originate New Master Key (PK3 or PK3+ key)
1. Insert new key into ignition cylinder and turn it to the ON (RUN) position. The security light on the dash will illuminate and stay on for ten minutes. 2. When the security light goes out, you have one minute to start the next step. Turn the ignition cylinder to OFF and then back to the ON (RUN) position. The security light on the dash will illuminate and stay on for ten more minutes. 3. When the security light goes out, you have one minute to start the next step. Turn the ignition cylinder to OFF and then back on the ON (RUN) position. The security light on the dash will illuminate and stay on for ten more minutes. 4. After the security light has gone off the third time, the key has been programmed into the vehicle’s computer and will operate the car. It has replaced ALL the previous electronic key codes and is the ONLY key programmed into the vehicle’s computer.
Add Duplicate Key (PK3 or PK3+ key)
1. Insert an existing key into the ignition cylinder. 2. Turn the ignition cylinder to ON (RUN) and back to OFF. 3. Remove the existing key and, within fifteen seconds, insert the new key and turn it to ON (RUN). 4. The security light will light up for two seconds to indicate success in programming the key into the vehicle.