WHERE IS THE COMPUTER BOX LOCATED IN BUICK CENTURY 2001

SOURCE: horn relay 95 Buick century

It is located in the convenience center to the left of the steering column.

SOURCE: Where is the fuel filter located for Buick Century 2001

The fuel filter is located underneath the car in front of the gas tank.
You have release the fuel pressure. Remove the fuel filler cap, locate the fuel test port on the fuel rail on the passenger side on the end of the right real fuel rail for a 3.1L engine.
3.8L engine yhr test port is located at the pressure regulator under the trim cover.

SOURCE: Radiator Plug Location

It should be on the right lower side of the radiator when looking at the engine .

SOURCE: Fuel gauge is stuck on full for a 2001 Buick

Gm cars are common for having defective fuel tank sending units in the tank. Yours likely needs replaced.

SOURCE: 2001 Buick Century shift solenoid

It is in the side cover on the valve body. The transmission needs to be removed to access the solenoids.