1999 Cadillac DeVille run out of gas now won't fire up
Most likely burned up the fuel pump when it ran dry. Fuel pumps use the fuel as a coolant so if you run your fuel tank lower than 1/4 your exposing the pump so it runs hotter, eventually it burns up.
Search Cadillac DeVille Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Cadillac DeVille Experts