FILE - This Jan. 17, 2017, file photo shows a Ford sign at an auto dealership, in Hialeah, Fla. There’s no apparent signs that Wall Street is worried about a plant fire that is forcing Ford to cut back on production of its F-150 pickup, the top-selling vehicle in America. The company suspended F-150 and Super Duty production in several cities. (AP Photo/Alan Diaz, File)

A fire that damaged a Michigan auto parts supply factory is causing production problems at Ford, Fiat Chrysler, BMW and General Motors, but it's too soon to tell whether dealers will run short of vehicles.

So far Ford has been hit hardest by parts shortages. The company has had to temporarily lay off 7,600 workers as it cuts production of the F-Series pickup truck, the top-selling vehicle in America.

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FILE - In this May 2, 2018, file photo, emergency personnel respond to a fire at Meridian Magnesium Products of America in Eaton Rapids, Mich. The fire that damaged the auto parts supply factory is causing production problems at Ford, Fiat Chrysler and General Motors, but it’s too soon to tell yet whether dealers will run short of vehicles. So far Ford has been hit hardest by parts shortages. (Matthew Dae Smith/Lansing State Journal via AP, File)

But General Motors has been forced to stop producing full-size vans at a factory in Missouri, and production of Fiat Chrysler's Pacifica minivan has been curtailed in Windsor, Ontario. BMW says it expects some production interruptions at its SUV plant near Spartanburg, S.C.

It's all because of a May 2 fire that severely damaged the main plant at the Meridian Magnesium Products of America factory in Eaton Rapids, Mich., near Lansing that makes structural parts, about one-third of which goes to Ford. Multiple automakers have turned to Meridian to produce parts made of the lightweight metal as they try to shed pounds to meet government fuel efficiency standards.

Ford says it's working with suppliers to limit the impact on production. "We're confident that any impacts will be short-term," Joe Hinrichs, executive vice president and president of Global Operations, said in a statement.

The company said it still has an ample selection of trucks at U.S. dealerships. At the current sales rate, Ford Motor Co. has enough trucks to last 84 days.

Fiat Chrysler confirmed that Pacifica production had been affected but said no workers had been laid off. Instead, they'll make more of an older minivan as the company works with Meridian to get more Pacifica parts.

Spokeswoman Jodi Tinson said FCA isn't expecting any large production disruptions at any factories other than Windsor.

But a union official at a Jeep Wrangler SUV plant in Toledo, Ohio, said it's possible some weekend overtime shifts could be cut due to parts shortages. Mark Epley, Jeep unit chairman for United Auto Workers Local 12, said Thursday they've got parts and still are running 10-hour shifts. "This weekend may be a different story," he said.

At GM's Wentzville, Mo., factory, the company has been forced to cut production of the GMC Savana and Chevrolet Express big vans.

BMW said it's working to find other sources for magnesium parts but until supplies stabilize, it won't build as many X5 and X6 SUVs. X3 and X4 production won't be affected.

Ford expects to continue Super Duty production at a factory in Avon Lake, Ohio, near Cleveland.

The cause of the fire at the Meridian plant isn't known. Authorities said there were explosions and two workers were hurt. People reported feeling the blasts miles away.