I had the same problem, with the same make/year. You need to replace your hub/hubs. I replace only the one on the driver side front but it's recommended that you replace both at the same time. It's quite easy to do I did it myself.
Coupe DeVille
The number of miles per gallon that the 1997 Cadillac DeVille can achieve is dependant on a number of factors such as the condition the vehicle is in or the driving style of the driver. However, the Cadillac DeVille is believed to get between 17 and 23 miles per gallon.
One reason a 1998 Cadillac Deville would cut off while driving could be the fuel pump or the car is out of fuel. Another reason could be the spark plugs.
water pump or thermostat housing crack
I have a 98' cadillac deville and it should constantly read around 197-201 when you are driving. It will definitely increase when you come to rest: example at a street light. something is definitely wrong and should be checked.
You have a hole in your brake line.
17 city 26 highway. Expect around 20-22 combined driving.
The gas tank for a 2004 Cadillac DeVille has a capacity of approximately 18 gallons. This allows for a decent driving range before needing to refuel. Always check the owner's manual for specific details and recommendations regarding fuel and maintenance.
The 1994 Cadillac DeVille has a fuel tank capacity of approximately 20 gallons. This allows for a reasonable driving range, especially considering the car's fuel efficiency for its size and era. Always refer to the owner's manual for the most accurate information regarding your specific vehicle.
From all of my experience with cars if a car turns off while in motion it tends to be the alternator.
when overheating occurs at highway speeds the cause is usually. a radiator or coolant circulation problem, Check for a restricted or clogged radiator.
crank or camshaft sensor check for codes put your beauiful car on the neutral when you're braking you'll stop to stall