There is NOT 1. not on that year.
It is located on the side of the Engine block.
The 1989 Chevy Caprice was 212.2 inches long (5,390 mm).
... what about it?
No it does not.
I have a 89 Chevy caprice. When I had my fuel pump changed, they had to drop the tank...it was in the tank.
My 1989 Chevy Caprice Classic with a 350 CID motor has a 27 gallon tank.
The speed sensor connector is located on top of the transaxle, passenger side. It is next to the end where the CV axle goes into the transaxle.