My left bass was blown a few years ago...wasn't awful, but when you moved all the audio to the left side of the car, you were noticably missing something.

Now, suddenly, you can hear it rattle a LOT LOT LOT. ANY bass parts at all(and its not like I'm listening to bass heavy songs lol) and it fuzzes up completely. Only way to stop it is to change all the sound to the right side of the car.

I know I need to replace it.
but is there a temporary fix I can do it just get rid of that rattling speaker and keep the other left side speakers going?

unhook it

Stupid question, but where?

At the blown speaker.

Pull the door panel off and you will be able to unplug the speaker right from the back. It'* not as hard as you may think.