A parts shortage has forced GM to halt production of its Blazer mid-size SUV at its plant in Mexico.

The new Chevrolet Blazer introduced to the market earlier this year is built at GM’s plant in Ramos Arizpe.

An ongoing labor dispute between the automaker and the United Automobile Workers union has caused numerous problems for the company in recent weeks.

It appears that this production halt is due at least in part to the turmoil surrounding GM. The plant doesn’t have the necessary parts on hand to build the Blazer. The needed parts are built in the United States.

The decision to build the Chevrolet Blazer in Mexico was criticized by the UAW when it was announced last year.

“This news that the iconic Blazer nameplate will be built in Mexico is disappointing to UAW families and communities across this country,” Terry Dittes, vice president of the UAW’s GM Department, said in 2018. “This is all happening while UAW-GM workers here in the U.S are laid off and unemployed.”

The Chevrolet Blazer has been one of GM’s most important vehicles since its return, selling over 20,000 units last month alone.

The labor dispute between GM and UAW could be coming to an end this week as both parties announced an initial agreement that could be enacted this week. Union members will vote on the proposal on October 25.