How do you change the cornering lights on a 1995 Oldsmobile Aurora?

The left turn signal, the one right next to the cornering light, is burned out. I have the correct bulb but I have no idea how to get in there to change it. Even looked through the owner's manual, nothing. Help would me much appreciated!|||Some lens covers are tricky. Don't take a chance in cracking it. Go to a pro and have it fixed correctly.|||Is there a white knob type thing on the top of the complete assembly? If so, turn it then push it either forward or back, if you look down and behind the assembly you will see that it's a sort of lock rod, you have to push that away in order to free it up then you should be able to loosen it enough to change the bulb out.