Most likely the alarm cpu or control module. Sometimes the relay between the module and the starter interrupt goes bad, trace the wiring, find the relay, make sure all connections are secure, if so, try replacing the relay. If not the problem, have it towed and have alarm checked out. There are a few other things to check. However, me realistically diagnosing the problem the way you describe would be like someone listening to a motor over the telephone and trying to determine if a cylinder has low compression. Nearly impossible. Without an actual working knowledge of the mechanics involved with your specific auto you will be lost. I could even describe how to by-pass the alarm between starter and battery, but unless I am there I would not suggest doing it by yourself. In any event, find the alarm cpu/module, follow the wiring to the relay that operates starter/interrupt, check wiring and/or replace relay. If this doesn't work, bring it to a good alarm mechanic, shop around and check the BBB for good guys in the business. One last thing, check your battery, make sure the voltage is appropriate and battery connections are secure. Good luck!
SOURCE: Windows won't go up our down power door locks
It may be as simple as reprogramming your system. There is a way to re-synch your keys to the system. Use the instructions at:
http://www.programyourremote.com/classified/DisplayAd.asp?id=334
That vehicle had a lot of problems with the PCM "Power Control Module" and that may be your problem.
SOURCE: I have a 2002 Impala
I suspected that BCM was defective. Security light, Service Engine light and Air Bag lights kept flashing (also we had clicking noises under the dash and the headlights would blink). The vehicle only had 39k miles and the warranty was expired. The dealer did not find any engine codes
during the diagnostic, but agreed that the BCM was probably the cause.
The repair cost about $350.
I fought with Chevy Customer Service and they sent me a refund check for
1/2 the repair cost. After the BCM was replaced the problem went away! Chevrolet has alot of problems with defective BCM's!
Ask about this ans test your BCM with Chevy dealer.
SOURCE: Won't start. Turn the ignition and nothing.
if nothing happens when you turn the key the problem is most likely the ignition switch and housing(had mine replaced 3 times already. firstr time at 12,000 miles) what you can try is hit key with rubber mallet while trying to turn but this would only be to get it started so you can drive to a chevy dealer(dont waste your time at any old repair shop for this). Hope this helps.
SOURCE: 2003 Monte Carlo SS, FOBS
If the passkey is messed up, there will be a light on the dash that says security, or have a picture of a car with a lock thru it. If there is no light when the key is turned forward, then its NOT a passkey problem.
SOURCE: When I turn off the
is it a cavalier or sunfire in the door there is a dome light switch this allows you to listen to the radio or put thwindow up or down for 30 to 60 seconds sometimes the door switch shorts out on the drivers side you can test by taking the pass door switch and change for drivers door if not a short to body modual
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