Yes
Underneath the right headlight
It's behind the headlight.
Pull up on the two small ("L" shaped) slides(on top of headlight ass.).Headlight pulls out.
behind right headlight
By removing the locks that hold the headlight assembly in place you can wiggle the headlight assembly out to gain access to the headlight bulbs for replacement.
To remove the headlight lens on a 1999 Buick Century, start by opening the hood and locating the mounting screws securing the headlight assembly. Remove these screws, then gently pull the assembly forward to unclip it from the vehicle. Disconnect the wiring harness from the back of the headlight, and you can then access and replace the headlight lens as needed. Be sure to reverse the steps to reassemble everything properly.
The chime is located on the dashboard of the Century. If it does not sound, you may need to have your vehicle's electrical system examined.
The original installed refrigrant was R12.
Yes, that is possible with some modifications.
Under the right headlight, there is 2, one for high tone, one for low tone.
The radio in a 2002 Buick Century is changed by removing the bezel, disconnecting the wiring harness, and removing the retaining screws. It can then be pulled from its mounts and a new radio installed.
Where is the headlight sensor for a 1999 buick regal? Its in the back, sike ;D