It should be an inline filter on the passenger side located under the car near the rear door.
The fuel filter is located on the passenger side frame rail just ahead of the rear wheel. Drivers side, mounted to the frame. The fuel filter on a 1991 Caprice is located on the passenger side frame rail just ahead of the rear wheel.
In the tank
The computer for a 1991 Chevy Caprice Classic is located behind the glove compartment. This provide a centralized location which gives a small level of protection to the computer.
The cast of Caprice Classic - 1991 includes: Stina Rautelin as Taina Castren
Yes you can.
It is located at the bottom of the radiator .
Passenger side rear just before the rear axle on the inside of the frame. It has two quick disconnect on the filter. The only tool needed to replace is a wrench to unscrew the filter from the frame.
No, auto parts stores show different part numbers.
driver side above the oil filter> its a long sensor that screws into the engine block