They're not all for the Chevrolet Volt, but 200 new jobs are coming to General Motors Detroit-Hamtramck plant in July.

GM is adding the positions to the factory because the overall production rate will increase once the facility starts making the 2013 Chevrolet Malibu, sources "familiar with the situation" told the Detroit Free Press. Those same sources told the paper that there is now a shortage of Volts in California, following a four-week shutdown (originally scheduled for five weeks). Another shut-down – this one for three weeks – is still on the calendar for June before the new Malibu comes on board, the sources said.

GM is having decent months of Volt sales, selling 1,462 in April after moving a record 2,289 in March. GM introduced the Eco version of the Malibu (made in Kansas City) first, and the Hamtramck plant will only be building the standard versions for that launch later in the summer.