Its been using the regular Green stuff since it was new, so just the standard is fine dave
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.
dex - cool orange coolant ,any coolant flush
1994 is close to the time GM changes coolant types. Look at the old fluid color. If it is green then "standard" antifreeze will work. If it is reddish orange then dexcool is the proper type.
Dex cool
All antifreeze is the same.
A 2000 Buick uses Dexcool.
Pentosin Type G12.
G12
Red five year, hoat type.
One type of antifreeze that can be used is Pentosin PENTOFROST A1. Pentofrost A1 is an antifreeze for Asian vehicles in water-cooled engines.
it doesen t use regular antifreeze, you have to use dexcool, its orange color