1998 Buick /Lesabre
3800
tech = kk
question = my car never ran hot or gave me any problems one day it
started riding funny so i pulled over and turned the car off when i lifted
up the hood it was no water in it and there was no sign of
leakage(water was in it a couple days prior).I put water in it, but then it
wouldn't crank. Please tell me what could this possibly be??

The conditions you are describing are tell-tale signs that the "Upper intake
manifold plenum" has failed internally. When this happens, coolant fills the
lower intake manifold and cylinders. This causes what is called a hydrostatic
lock and the engine wont crank over.
The upper plenum and gaskets will need to be replaced, as well as the
spark plugs, and the cylinders will need to be cleaned out.