General Motors will add two battery-electric vehicles to its lineup in the next 18 months as part of its plan to roll out 20 such vehicles by 2023, the company has announced.

While the initiative will lean heavily on electrification, General Motors will also employ hydrogen fuel cell technology as as part of a two-pronged approach "depending on the unique requirements," according to an announcement.

The new battery-electric vehicles that will arrive in the next 18 months will be "based off learnings from the Chevrolet Bolt EV," according to GM.

"General Motors believes in an all-electric future," said Mark Reuss, GM's executive vice president of product development, purchasing and supply chain. "Although that future won't happen overnight, GM is committed to driving increased usage and acceptance of electric vehicles through no-compromise solutions that meet our customers' needs."

GM also introduced SURUS (Silent Utility Rover Universal Superstructure) — a fuel cell powered, four-wheel steer concept vehicle on a heavy-duty truck frame that's driven by two electric motors. With its capability and flexible architecture, SURUS could be used as an emissions-free delivery vehicle, truck or even an ambulance, according to GM.