2004 Chevy Impala - no response after key security delay

If your 2007 Chevy Impala is making a clicking noise before the key is even inserted into the ignition, it could be caused by a few different issues. Some potential causes include:

1. Faulty starter motor: The starter motor is responsible for starting the engine when the ignition is turned on. If the starter motor is faulty or has worn out, it may make a clicking noise as it tries to engage with the flywheel.
2. Loose or damaged starter motor relay: The starter motor relay is an electrical component that sends power to the starter motor when the ignition is turned on. If the relay is loose or damaged, it may cause a clicking noise.
3. Low battery: If the battery is low on charge or has gone bad, it may not have enough power to start the engine, causing a clicking noise.
4. Other electrical issues: There may be other electrical issues, such as a loose connection or a problem with the ignition switch, that are causing the clicking noise.

To determine the cause of the clicking noise, it is recommended to bring your vehicle to a mechanic or a dealership for further diagnosis and repair. They will be able to test the starter motor, battery, and other electrical components to determine the source of the problem and recommend the appropriate repairs.

• How do you reset security system on a 2004 chevy impala the way i learned how to reset them is to turn on the ignition switch to the on position until all the lights come on but don't turn it to start leave for 15 minutes and when you come back turn key to off position and wait three seconds and then it should be reset. I hope this helps.

Most likely its failing to properly read the transponder in the key head. Make sure you dont have keys for other cars near the impala key.

Also try a different key... if same symptoms the transponder antenna in the ignition lock may be failing or the immobilizer itself.

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Passlock Security system... - Discussion on Topix

Why do think the key security is bad? If you still have a factory key, this is not the problem...if no factory key, you can take your VIN number or original key to GM dealer to get new key that they will program for you...Check for dirty battery connections:)

Hi Glenn, did you by chance replace your PCM with a used computer? If so you will need to have it reflashed, If not sounds to me like the Passkey security needs to be relearned. Also wondering why you replaced PCM after replacing EGR valve, Please if you can give me some more info on your veh. Body control module controls security so something is not right. Please get back to me, Thanks Randy.

I’m happy to assist further over the phone at https://www.6ya.com/expert/randall_d932ef6e01588b0f

Is the "Security" light coming on?. If so, there is a problem with the Passlock key antitheft system. It is common for the ignition cylinder key detection contacts to go bad.

Replacing the key cylinder fixes the problem. The new cylinder has to be "relearned". See the internet and search for "2004 Chevrolet passlock system relearn procedure".

You have to have the key coded with the ignition switch at a lock smith,or the dealer.

check all the ground cables and wires.make sure that the ground cable going to the engine is clean and tight.

If the battery has gone dead, it could cause the security system to go into full lock-up mode. If it has locked up the accessories will work after the battery is charged back up , but the power to the starter will be cut off and it wont turn over. You need to do the 30 minute learn procedure. A GM dealer will print it out for you and you can do it yourself. It's very simple if you follow the procedure exact. hope this helps and good luck.