Last August, GM merged those separate online shopping experiences into a single storefront, now offering a combined roster of about 270,000 parts and accessories from GM and ACDelco.

A new GM valve body is now arriving at dealerships, GM Authority has learned, addressing a backlog that has left many GM customers waiting months for repairs.

The broader strike, which targets 38 parts distribution centers owned by GM and Stellantis, "is going to have these shops telling their customers 'We don't know when we can fix your vehicle.

More: GM announces closure of Arizona IT Innovation Center, resulting in 940 job cuts Kelly said Flint Assembly, where GM also builds heavy-duty pickups, is running normally with no parts issues.