2000 Chevy Impala, alarm remote issues

No probably not, someone other than an authorized alarm installer installed it and thats why you have an issue- the main issues is alarms and especially remote starts gains access to very powerful parts of your car and if connected and fused correctly would cause no damage to the car but will rarely fail. If in fact it is plugged up correctly then you have nothing to worry about unless it has a kill switch the car should operate normally without the remote start. If you do have a kill switch and the alarm was engaged and malfunctioned you may not be able to start your car without bypassing the remote start. Try looking for burn out fuse on the alarm fuse connections and the cars fuse box. don't buy an alarm module unless its the main control unit(another alarm) as this will not help- most alarm accessories are sensors most if not all the relays are in the main control box which is the alarm. good luck
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Turn the key on and leave it on until the theft light blinks or goes off.It should start then.This could take 10 to 20 minutes.

That would depend on what kind , how it works , power supply etc.... You mite what to have it towed to a repair shop , that is if it won't start . You could very easily make your vehicle useless . cutting wrong wires . I'm sure you have no idea of the computer systems on your car an the serial data network that all those computers share information on . How to Diagnose Controller Area Network CAN . We are here to help an give you are best suggestions . Without looking at it ,seeing how it's hooked up . I just couldn't say .

Impala's are famous for ignition issues, are the interior lights of your dash coming on when you want them, or just by themselves? The clicking after you turn off, I would check the security system, i.e., remote clickers, cars computer, key chip, ect. Sound like your alarm is attempting to engage

Take the positive lead off the battery. Touch the battery with the lead on and off for about five to seven times. This should reset the alarm. Reconnect the positive lead and using the remote control for the vehicle alarm arm and disarm the alarm once before operating as normal.

alarm remotes not disarming system look in manule for instructions on how to place alarm in valet mode
to disable alarm

the only fix for this is to have the aftermarket alarm removed out of the system. unless you can locate the manufacture of the alarm and purchase another remote.

turn key on but don't start. let sit for 10 minutes or so and start engine.

The Simple Act of Locking the Driver side Door WITH KEY Arm the Factory Alarm. And UNLOCKING Same Door with KEY Disarms it The FOB < Rmote for Alarm Just Honks Horn and Flashes Lights, But it Does the SAME ARMIND & DISARMING. I Hope this Helps You out !!

to disarm the alarm. turn the key in the door or trunk.