GM, Ford Production Hampered as Snowstorms Shut Roads

General Motors Co. and Ford Motor Co., the two largest U.S. automakers, canceled or shortened shifts for at least seven vehicle assembly plants in Canada and the U.S. Midwest because of weather-related road closings.

For GM, based in Detroit, the stopped or abbreviated shifts affected production of the Chevrolet Equinox and GMC Terrain compact sport-utility vehicles, the Chevrolet Impala sedan and Camaro coupe, the Cadillac CTS and STS sedans, and Chevrolet Silverado and GMC Sierra pickups.