U.S. sales of medium- and heavy-duty trucks fell 35.5 percent in February from a year earlier to 16,138 units, continuing a sales slide that began in February 2007.
For the first two months, sales of the trucks dropped by the same 35.5 percent, to 33,252.
Sales collapsed at a double-digit pace in every category.
Class 8 trucks, the largest size, tumbled 39.0 percent in February to 6,236. Class 8 sales rose from June through December 2008, then stumbled 23.2 percent in January.
In other size categories, from medium-duty on up for February, Class 4 sales fell 21.9 percent to 3,101; Class 5 sales dropped 44.2 percent to 1,739; Class 6 sales tumbled 50.8 percent to 1,790; and Class 7 sales slid 19.6 percent to 3,272.
International led all brands' sales with 3,827, despite falling 23.4 percent. Ford was No. 2, down 32.9 percent to 3,219.
Freightliner dropped to third from first a year earlier on a 42.4 percent slide in sales to 3,008.