How do you drain gas tank on a 2003 gmc envoy?

To drain the gas tank on a 2003 GMC Envoy, first ensure the vehicle is on a level surface and the engine is off. Locate the fuel pump relay in the fuse box and remove it to prevent the fuel pump from activating. Disconnect the fuel line from the fuel filter or rail, using a fuel line tool if necessary, and direct the line into a suitable container to catch the fuel. Finally, you can siphon any remaining fuel from the tank using a siphon pump or a similar tool. Always follow safety precautions when handling fuel.