The United Auto Workers national strike against General Motors is beginning to have ripple effects for the automaker. GM has confirmed production at its Oshawa, Ontario assembly plant is now impacted due to a shortage of parts caused from the strike.

GM Canada has confirmed it has temporarily laid off 1,200 workers from the Oshawa assembly plant. The layoff is the result of the assembly plant running out of parts to produce the company’s Chevrolet Silverado and GMC Sierra pickup trucks. GM anticipated this as a result of the U.S. strike, which has been ongoing since Sunday.

While the truck assembly line has been shutdown, the Oshawa plant will continue to produce the Cadillac XTS and Chevrolet Impala, both of which are slated to end production anyway in December. Even though production of the two sedans hasn’t ended, getting them to dealerships may be difficult since many Teamsters are boycotting transporting GM vehicles.

Speaking of parts shortages, GM has also developed an app for dealerships to leverage to share parts amongst each other. The app was built in anticipation of dealerships ultimately running out of replacement parts if the strike lasts very long, which is impacting GM distribution centers.

GM hasn’t stated what the plan is if the strike lasts so long that dealerships start running low on parts inventory.