2004 Sequoia remote button light out

Just noticed the Sequoia's garage door button light is out.
The strange thing that I thought those three buttons (labeled with one two
three dots) were lighted from the same light source. Obviously I am wrong.
The button with one or two dots are still visible in the dark.

How do I replace the light bulb (if any) under it?

BTW, I am waiting to add navigation to the Sequoia but I am fine to use a
PDA as GPS display. I hope the next model year/2006 of Toyota navigation
can also integrate bluetooth. It will make more sense if I choose to
add/upgrade when it is available. Any news about this possibility?

Thanks