First step: Clean your car!
Survey your prey.
you want to pry lightly from the TOP and BOTTOM halfs of the light, not from the left like I'm playing around.
Before you go yanking the light out anymore, you have to disconnect the wire harness. For those who care, like me (rabid for dem leds) red is +12, white/black stripe is ground. The switch interupts the +12, which is different from the other dome lights. The switched lead then goes to the BASE of the bulb, not the TIP.
This is why you cleaned your car. If you did poorly like me, then these little retention clips went shooting out of the fixture when it released from the head liner. they're a lot easier to find ina clean car

There are three of them.
You can see where the little spring clips get reinstalled, one is installed on the right portion, when the left remains empty.
Beginning disassembly, there are two screws that need to be removed #2 phillips works fine.
There are two of these little tabs that need to be released in order for the module to come free. Take good care in not snapping them!
The back will now remove from the face.
This should contain all the information you need for a new bulb.
Also from my memory these are the same bulb from the front map lights, Stanley 12V, 8W.
You can find all my pictures here
http://img.infinint.net/v/ua/jigg007/car_001/
I plan to add more pictures of crap I do in the future, to the DIY album, we will see how my free time plays out.
Re-installation is the process reversed, not too difficult at all. I hope this helps you.
LEDs, here I come!!