Stock Speaker Size?

So what is the speaker size that comes with the Pontiac Grand Am? My rear speakers are going out and I need to know what type of power I am dealing with so I don't replace them with 3-ways that will drain my battery. I am not ready to put in a whole new soundsystem with amp and powerpack.

Installing different speakers such as three ways, will not drain your battery.

Speakers only use the SIGNAL that is sent to them from the head unit - this signal does not increase with the new speakers.

The amp is an altogether different story - it will drain your battery when the engine is not running.

i believe that your front speakers are 4x6 and your rears are 6x9. even though the fronts have a 6 1/2 face plate, they are definately 4x6

cool, thanks