I have a 2002, thinking 2001 should be the same.

To replace the bulb, pull the socket straight out, the retainer should keep the bulb in place, loosen the retainer to take the bulb out (twist and pull), take note on the orientation of the connectors, put the new bulb in (twist and push, make sure the base of the bulb is in contact with the metal rim) put the retainer on to lock the bulb in place, look in front of the lamp assembly to make sure the bulb is NOT touching the glare shield inside the assembly, make adjustment to the bulb if it does and lock it back in place, then put the socket back on (hopefully, it is not upside down, if so, turn the bulb around). There isn't much room, just be patient. It took me a couple of hours to figure out how to take bulb out the first time around. Common mistake is to try to lossen the retainer with the socket in place, that may be the reason why you can't take the bulb out of the socket.

Good luck.

BC