Shares of General Motors Co. /zigman2/quotes/205226835/composite GM +4.14% fell 4.1% in morning trading Wednesday, after the auto maker said first-quarter deliveries fell 7% fomr a year ago to 618,335 vehicles. GM said the declines come as the auto industry experienced "significant declines" in March as a result of the COVID-19 pandemic. Deliveries fell for all of GM's brands, with Chevrolet down 3.8%, Buick down 34.7%, Cadillac down 15.8% and GMC down 5.5%. The model with the most deliveries was Chevrolet's Silverado LD, as that increased 33.6% to 112,925 vehicles, followed by the Chevy Equinox, which dropped 17.0% to 73,453 vehicles. GM said inventory at the end of the first quarter was 668,443 vehicles, down 18% from last year. GM's stock fell 43.2% over the first three months of the year, the worst quarterly performance since it began trading in its current form in November 2010, while the Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA +1.44% dropped 23.2% over the same time to suffer its worst quarterly performance since Q3 1974.