Medium and heavy truck sales were up 4% in March over the same period a year ago and up 28% for the first quarter, according to figures compiled by Wards Communications.

Dealers sold 43,813 trucks with GVW ratings above 10,000 pounds during the month, up from March 2011 (42,188). For the quarter, the total was 133,311, up from 103,962 in 2011.

Compared with March 2011, Class 8 trucks were up 19% (15,418, compared to 13,010). Class 3 and 5 were the only other classes to show a gain.

For the quarter, Class 8 showed the biggest jump over a year ago (47%, 46,845 compared to 31,958). Class 5 sales were up 30%, Class 7 14% and Class 6 12%.

Total sales of all classes have been up 8%, from 1,606,407 to 1,734,312.

Every class has been up, except for Class 4 (down 4%).

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