GM's 72-hour sale starts today and runs through July 6. The sale terms include 0% financing for 72 months on select models for those buyers who qualify.
Not every GM vehicle is included in the deal but the 2009 and 2010 Chevrolet Silverado 1500 and GMC Sierra 1500 half-ton pickup trucks are.
GM is also offering 0% financing for up to 60 months for well-qualified buyers on the 2009 Hummer H3T and Cadillac Escalade EXT.
Other models have separate incentives you can find here.