General Motors has announced a $150 million investment at its Flint assembly plant to expand production of its heavy-duty pickup trucks. Plans include improving the factory’s conveyor system and  other equipment to increase output.  The factory builds heavy-duty Chevrolet Silverado and GMC Sierra pickups, which have been redesigned for the 2019 model year.

GM did not say any new jobs would be added when it made the Wednesday announcement, but earlier this year, it did announce plans to add 1,000 employees at the plant, which has three shifts per day and employs about 5,000.

Sales were down 2.2 percent for the Sierra from January through March, and nearly 16 percent for the  Silverado as factories switch to the new models. GM expects the increased capacity to increase sales.