STAGGERING SALES: Chevy Volt sales drop to 603, Nissan moves 676 Leafs in January. “This one has got to hurt. After a record-best 1,529 units sold in December, sales of the Chevrolet Volt dropped to just 603 in January, part of an overall decline in GM model sales compared to the last month of 2011. The good news in this less-than-half drop? If you look at the year-on-year trend, the Volt almost doubled its sales. In January 2011, Chevy sold 321 Volts.” Well, okay then.