Why would all your lights to 2000 impala flicker headlights inside lights dash lights?

Check the voltage levels. If the regulator is having a little trouble, the voltage may jump around a little. It's usually not much of a problem, but if you're very concerned, take the vehicle to an auto parts retail store that has the ability to check your charging system.

my problem on my Chevy blazer was the keyless entry

http://www.youtube.com/watch?v=E9qlLrQ6v5E