DETROIT—General Motors is the latest car company to unveil plans for an emissions-free future. On Monday morning, the US’ largest automaker announced that the next 18 months will see two new electric vehicles join the Bolt EV in showrooms, and 18 more are due by 2023. “GM believes in an all-electric future and a world free of automotive emissions,” said Mark Reuss, GM’s executive VP for product development, purchasing, and supply chain. “When the Bolt EV was announced at CES it was described as a platform, and this is the next step.”

The announcement took place at GM’s Design Dome, site of many a new product reveal. As you’ll see from the photo above, there were a number of cars hidden by dust sheets. We were given a sneak peek at three of these—a conventional-looking midsize crossover and two more futuristic vehicles, including something that looked like a driverless pod—but sadly photography was not allowed, and no one took the wraps off what looked like either a Corvette or Camaro variant.

As has been the case with other electrification roadmaps, concrete details were thin on the ground at GM’s Warren Technical Center this morning. We do know a few specifics, however. For example, unlike other automakers, GM isn’t counting plug-in hybrids like the Volt or 48v “mild hybrids” among that number. But we don’t know how those EVs will split across GM’s various brands or whether some will only be for specific regions.