Ok, here we go, an easy way to prevent your drl's from coming on when driving in a 00-01 cavy, I'm not sure about 02 cavaliers, I haven't tried it on a sunfire but i don't see why it wouldn't work, ok when your in the car simply place the gear in N and flash your high beam off and on 10 times (this must be done fast). You'll know if it works because your service light will come on, but when you turn your car off and back on your service light wont be on and your car goes back to normal. You have to do this every time you turn your car back on.
Or you could just wire in a switch to the BCM and not throw a service light...
Most newbies dont know much about wires and switches so I gave them a way to do it without cutting wires.