Turn it floaty
The 1999 General Motors/Buick Century has its electronic horns in standard locations on the front of the vehicle. They will be located behind and under the front frame, aft of the bumper assembly.
The fuel filter for a 1999 Buick century is located on the drivers side frame in front of the fuel tank. It is an inline type and is easy to change.
1999 Buick Century Turn Signal Bulb Numbers can be looked up with the link below in Sources and Related Links.
Where are the relay switches on a 1999 Buick Century for the headlights
how do I remove the sunvisors off a 1999 Buick Century
If you mean size than 5.25 in front doors, 6x9 in back
how to replace window toggle switch 1999 buick century
i believe it is the rear right speaker. if it is plain green with NO black, then it is the positive wire check this site out: http://www.modifiedlife.com/1998-buick-century-car-radio-stereo-audio-wiring-diagram/
Try it, if it doesn't work then all you have to do is go to Walmart and get an adapter for it.
5
99 ?
10W-30