General Motors and Honda have been transparent about their alliance on battery-electric vehicles. However, details of the arrangement have been left to rumors and speculation until now. Honda has now confirmed it will source two EV’s from GM, one of each of its brands.

“Honda and GM are jointly developing two large-sized EV models using GM’s Ultium batteries, and we are planning to introduce these models to the North American market as model year 2024 vehicles, one from Honda brand and the other from the Acura brand.”

Both models are expected to be crossovers and similar in size to the Cadillac Lyriq. Rumors earlier this year hinted that the Honda model will be produced at GM’s Ramos Arizpe, Mexico plant, while the Acura would be built in Spring Hill, Tennessee. The Ramos Arizpe facility does not currently produce EV’s for GM, but Spring Hill has already been announced as an EV plant.

What is still unclear is how deep the parts sharing will be between Honda and GM. Obviously the Honda’s are going to leverage GM’s BEV3 architecture and Ultium batteries, but what else? Honda could theoretically supply its own drive units and other components to differentiate its products from GM’s.

While GM is helping Honda get a head start on bringing EV’s to market, Honda has its own plans. The company says it will begin launching EV’s on its own dedicated EV architecture in the second half of the 2020’s. Known as e:Architecture, this platform will launch in North America first before going global.