According to MovieWeb:
"The Dreads are a trio of black SUVs who, when they transform, have dreads and speak like Michael Clarke Duncan. These government off-road outfitted Chevrolet Suburbans are part of the MechTech crew, and they sport giant pincher's and a giant gun."
Transformers: Dark of the Moon, starring Shia LaBeouf and Rosie Huntington-Whiteley, arrives in theaters July 1st 2011!