Question about 2003 Chevrolet Impala

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Security light comes on and car doesn't want to start sometimes.

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  • gusta2006 Jul 24, 2008

    my 2004 chevy impala was stolen they bust the ignition and when i got it fixed the security lights keeps blinking and the car won't start

  • Anonymous Aug 07, 2008

    the security light is on sometimes then it won't start. ten minutes later it will start, the dealer said it is the ignition switch heating up the metal in side and when it cools off it will start again, they want 700 to change the switch which is in the dash, does that sound like the problem

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Disable the passlock system permanently. The other functions will still work just fine. The passlock system for some mystery reason sometimes senses an intrusion even if there is not one and locks down the fuel injectors. Underneath the steering column there is a metal plate held in place with a few bolts. It needs to come out. In order to do so you may have to remove some dash components but it is not as hard as it seems. Once the plate is removed running up the steering column there will be (3) wires bundled or tied together. These are the wires for the passlock system (Yellow + Black - and White neutral) It is the only group of 3 configured like this. START the car and while the car is running snip the YELLOW wire ONLY! and tape off the ends. Put everything back together and live better knowing your car will now start each and every time. The Yellow or Orange security light will stay on permanently but this will not cause any other problems.

Posted on Feb 16, 2009

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Read your owners manual - it suggests taking it to the dealer as something is wrong with the PassLock system.

Posted on Jul 25, 2008

2 Suggested Answers

jturcotte
  • 6811 Answers

SOURCE: what would make the security

Possibly key is worn out. Key has a resistor with contacts on both sides, right? Do you have an extra key that works better? Or, have a new key made at the dealer.

Posted on Sep 03, 2010

judd0081
  • 334 Answers

SOURCE: I have a 2000 monte carlo ss 3800 series.

The problem might be your Vats security system. This causes the car to either "not start" or "shut down" while running, or start for 5 seconds and then die. (depending on the system) If the security light flashes, i guarantee that this is what the problem is. 1st trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year.

Cheap fix: Bypass the chip in your key. Temporary, but effective.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. For a list of cars effected by this problem. See the NEWROCKIES link on the right side of their page.........
----- http://newrockies.ca?ap_id=judd0081
----- With this fix, you can take that whole Vats, passlock, passkey **** system out of your car all together. Good info on both sites

Posted on Jan 16, 2011

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