It is in the exhaust pipe where it comes off of the engine on the passanger side.
They were not used on that year.
That year did not have one. No need for it on that one.
The oxygen sensor is usually mounted in the exhaust manifold pretty close to where the exhaust pipe bolts on.
In the fuel tank.
The 1990 Buick LeSabre oxygen sensor is located on the outside of the air cleaner housing. The oxygen sensor will be on the back side of the housing.
It is mounted on the top of the starter.
34 gal.
spell check your answer
5 qts
it has throttle boddy
1990 through 1998
If you mean a low fuel light, then NO.