General Motors Co. (GM), missing sales goals for the Chevrolet Volt plug-in hybrid, plans to halt production of the sedan for five weeks beginning later this month rather than discount the high-technology cars.

GM will stop making Volts at its Detroit-Hamtramck assembly plant from March 19 until April 23, Chris Lee, a company spokesman, said in an e-mail March 2. The factory had ramped up to full-speed production Feb. 6 after the New Year’s shutdown.

While sales of the Volt in February more than tripled from a year earlier to 1,023, the rate is below what’s needed to meet Chief Executive Officer Dan Akerson’s goal of 45,000 deliveries in the U.S. this year. GM missed its target of 10,000 Volt sales last year, finishing 2011 with 7,671 deliveries.

“This move is to keep proper inventory levels,” Lee said in the e-mail.

GM executives have said publicity surrounding a two- month federal investigation into the safety of the Volt following a fire publicly revealed in November had hurt the car’s sales. The National Highway Traffic Safety Administration said in January that the Volt poses no more fire risk than other cars.

“Although we loaded the Volt with state-of-the-art safety features, we did not engineer the Volt to be a political punching bag,” Akerson said during a Congressional hearing on Volt in January. “And that, sadly, is what the Volt has become.”