How do you remove a gas tank on a 2006 Cadillac sts?

To remove the gas tank on a 2006 Cadillac STS, first ensure the vehicle is on a level surface and safely elevated. Disconnect the negative battery cable, relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls, then disconnect the fuel lines and electrical connectors from the tank. Support the tank with a jack, remove the straps or bolts holding it in place, and carefully lower the tank to remove it from the vehicle. Always follow safety precautions and consult a repair manual for detailed instructions.