Look in the manual to see if there is instructions for the user/owner to disable the panic button. The alternative is to contact a dealer service center for instructions.
Car doesn't have an alarm,just the remote door locks,Panic,turn the key to the lites come on and there should be a button to disable the alarm push and hold it.
The panic feature on the Chevy Impala can be disable by simple hitting the panic button on the remote if that doesn't work disconnect the cars battery.
If your ignition on your Chevy will not work the first thing you should do is check your battery. If your battery is low or dead the car will notstart.
To disable the panic button simply press the red button on your keyless entry system (FOB) and the honking should cease. If this does not work try disconnecting the battery to reset the system.