Do be careful when "Yanking" the old glass out.
The mechanical works in behind the glass sometimes break. Though "yanking"
is in fact the recommended procedure. Iif you break it you will end up
replacing the whole housing unless you are quite ingenious at repairs. This
is experience talking. Mine broke on the yank, and I ended up repairing it
after I was told that I had to replace the whole mirror as parts are not
available individually. It was quite an effort replacing it but mine were
painted to match my car so it was more than the cost of the mirror it was
the paint work too.

As for replacing the mirror.
If you need to replace the whole thing, yes you do have to remove the door
panel as the electrical plugs are in behind it.

You first remove all of the screws and the cup for the door handle. There
may be a plastic plug in the front edge, near the bottom. Be cautious when
removing it, or it may break. Roll your window down, push in the plunger for
your door locks and LIFT on the door panel straight up to remove it. You may
have to give it a little bump to get it started.

There are about four large plastic hooks along the bottom on the inside and
some scattered within the body of the panel. Be careful not to pry out on
them, or they will break.
If they DO break, you will end up with a door panel that will not attach
snugly and it may rattle.

And... lastly... if you want people to take you seriously in this group try
being a bit more cautious with your spelling and usage.
The guys in here (for the most part) are a surprisingly educated, mature
group. They will call you on the carpet for blatant misspellings and
grammatical bumbling.

HAY is food for livestock. HEY is a greeting.
I'm not picking on you, really.

Kate