GM Fuel and Propane Propane Gas Service & Maintenance, Propane Refill, Propane Delivery, Propane Gas Bottled & Bulk, Propane & Natural Gas. Propane and natural gas have been an important part of U.S. energy requirements for more than a century. In fact, with 10 percent of homes relying on it, the U.S. is the leading producer of propane, which is extracted from natural gas during a refining process.