A new Jeep Cherokee makes its way over obstacles during a media conference at the New York International Auto show March 27, 2013 in New York. - 

The "big three" automakers -- Chrysler, GM, and Ford -- are reporting sharp gains in sales for the month of March. Chrysler says the latest month was their best since 2007.

Juli Niemann, an analyst with Smith Moore & Company, joins Marketplace Morning Report host Jeremy Hobson to discuss the numbers and what's got customers buying again.