Question about 1999 Chevrolet Lumina

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Car won't start when security light is blinking

Lights on dash and headlights on but no juice to starter

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  • Anonymous Jan 15, 2009

    2005 Chevy Impala security light comes on when car is started. Did not want to start today

  • Anonymous Mar 04, 2009

    2002 Chevy Blazer Xtreme has flashing security light and won't start for 10 minutes. It doesn't do it all the time, only when I am already running late. lol. I read that it is a security problem with the key being worn down. The ignition doesn't recognize the key and as a security measure, prevents the car from starting. How to fix... not quite sure, but I am going to get another key and see if that works.

  • Anonymous May 09, 2009

    2003 Impala Message Center will show Red_Battery, then switch to Yellow_Security, then flash Yellow_Security, then flash Yellow_Security, then flash Red_Battery, then repeat. After a while (about 10 minutes), the car will start immediately. This occured with both the old and the new battery.

  • rgolding May 17, 2009

    security light flashing on dash and vehicle won't turn over at all help



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Vehicle anti-theft (VAT) system is not getting proper reading from the ignition switch. Your key has a resistor built into the head of the key (a silver bar on a black backing). Shine up this bar with some fine steel wool on both sides of the key. Possibly the wiring in the steering column that leads to the VAT module has gone bad or the connections in the ignition switch that mate up with the key's resistor no longer connect properly. End result: the starter and fuel injection system remain dead when all else seems normal............Security light on dash will stay on/flashing. There will be a 3 minute dead/reset period between each unsuccessful start attempt.

Posted on Mar 12, 2009

  • KmanF350 Mar 12, 2009

    You can get yourself a resistor (Radio Shack or elsewhere) that matches your key's resistor and splice it into the harness (found in the steering column) that leads to the VAT module. It will be 2 wires cased in a "hunters orange" jacket. This would be a last resort fix. The alternative is to have a dealer replace faulty parts, but this can be expensive and a resistor is cheap. (under $5)


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I have impala 2001 it has 36k mile and security light sometimes light on haw can i make it off

Posted on Oct 08, 2009

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I had this same problem . with my monte carlo . I was told from a mechanic buddy of mine to replace the battery wires as well as the brass mount that the wire goes to by the fuse box . it worked . he told me that with the littlest corrosion that the key would not get enough amps to engage the starter

Posted on Mar 06, 2009

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Make sure your battery is fully charged, and your cables are tight. also might be a loose connection at the starter.

Posted on Dec 01, 2008

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When I turn my ignition to the start positon the headlights and the dash lights come on but no crank the security light is blinking but not to sure if that is the issue I think it could be my starter,...

if the security light is blinking, it's the VATS system not recognizing the resister pill in the key. I currently have the same non start issue, but I bypassed the VATS ignition key but the car still doesn't start. My security light acts like it should. It comes on when the key is inserted and goes off after 5 seconds. If it blinks, it's not seeing the right value.

Google VATS system bypass. Resistors cost me about 3 bucks at radioshack.

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