DETROIT (AP) — General Motors announced its second major electric vehicle partnership in less than a week on Tuesday, this time a $2 billion deal with startup Nikola.

GM will take an 11% ownership stake in the Phoenix company and will engineer and build Nikola's Badger hydrogen fuel cell and electric pickup truck. The Badger is expected to be in production by the end of 2022.

GM also will help with cost reductions for Nikola's other vehicles including heavy trucks, and the company will use GM's battery system and hydrogen fuel technology.

In exchange for the 10-year deal, GM will get $2 billion worth of Nikola's newly issued common stock that will come in three increments through 2025.

News of the deal sent shares of both companies surging despite a broader-market downturn. Nikola shares were up nearly 38% in trading late Tuesday, while GM advanced about 8%.

The move sets up GM for a new revenue stream and possibly a change in its business model, essentially becoming a parts supplier to other companies for electric vehicle frames, batteries, controls and components.

GM has been under pressure from Wall Street to more quickly monetize its electric vehicle technology, and industry analysts have suggested spinning off its EV unit as a separate company.

Barra said on a conference call that GM has a "platform that others can use that's going to give us scale and help us drive efficiency." She said the electric vehicle platform and batteries are attractive to other companies, which is a huge opportunity for GM.

"We're going to leverage that and really seize the opportunity that we have to grow," she said.

However, she wouldn't comment on whether GM is in talks with other companies.

Nikola will be responsible for the sales and marketing of the Badger, but it will be built on GM's new battery electric truck underpinnings and use GM fuel cell and battery technology. GM also will supply batteries for other Nikola vehicles including heavy trucks.

GM has its own battery electric truck, a GMC Hummer, due to go on sale a year ahead of the Badger.

The deal is the second major partnership announced by GM this month as it lines up companies to share in the costs of developing electric and autonomous vehicle technology. On Thursday GM said it would join with Japanese automaker Honda  to share the costs of building vehicles powered by batteries and internal combustion engines.

GM expects to get more than $4 billion in benefits from the deal with the stock as well as from contracting to manufacture the Badger. GM also will get supply contracts for batteries and fuel cells and electric vehicle regulatory credits that can be used by GM to comply with fuel economy and pollution standards, or sold to other companies.

Nikola founder and Executive Chairman Trevor Milton said the agreement relieves his company of the expense of building another factory to make the Badger, which is a little larger than a Chevrolet Silverado. Nikola, however, will keep building a U.S. factory in Coolidge, Arizona, to make heavy trucks.

Nikola Corp., which hasn't made a profit yet and lost $86.6 million in the second quarter, expects to save over $4 billion in battery and powertrain costs over 10 years.

Wedbush analyst Daniel Ives, in a note to investors Tuesday, wrote that the deal is huge step forward for Nikola, giving the company credibility with Badger production and its hydrogen fuel cell and semi truck ambitions.

"There have been many skeptics around Nikola and its founder Trevor Milton's ambitions over the coming years, which now get thrown out the window with stalwart GM making a major strategic bet on Nikola," he wrote.

Nikola, founded in 2015, became a public company in June after a merger with VectoIQ, a publicly traded special-purpose acquisition company.

When it went public, Nikola added former GM Vice Chairman Stephen Girsky, CEO of VectoIQ, to its board of directors.

Barra said that Girsky made initial introductions to help start the deal.

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AP Business Writer Michelle Chapman contributed to this report.