Pontiac G5 tail light flash question

My rear driver side flasher no longer works and the front one flashes very fast so I assume that the rear one is just burnt. The tail light still works but the flasher does not. Is there more than 1 bulb per tail light, 1 for the brake light and 1 for the flasher ? If so, does anybody know what kind of replacement bulb i need ?

Do I have to remove the tail light to replace the blub ???

Thanks

Yes- pull out the tail light lense by uncovering the plastic nuts inside the car- then slip the lense out- and then unplug electrical connector- then remove light bulb- Autozone or any other parts house can read the numbers on the bulb- or look it up for you...