99 lumina lights

Do you mean the daytime running lamps? Or, it could be that the ambient light sensor is broken or always sending the "it's dark outside" signal to turn on the automatic lights. If they turn off when you turn the car off, I wouldn't worry about it.

where is the sensor located?

Pull fuse #33

I know the 2000 Silverado has a thing where if you Triple tap the dome overide button then it would turn off the headlights and running lights does the lumina have anything similar?

E brakre