How much does it cost to fill up the gas tank in 1999 cadillac sts?

The cost to fill up the gas tank of a 1999 Cadillac STS depends on gas prices and the tank's capacity, which is around 18.5 gallons. If we assume an average gas price of about $3.50 per gallon, it would cost approximately $64.75 to fill the tank from empty. However, prices can vary based on location and fluctuations in fuel costs.