The bonus cash is in addition to any prior dealership sales and low-interest rates. Certain models, specifically popular vehicles, are excluded from GM’s offer. Such models include the 2007 Cadillac Escalade; 2007 GMC Yukon/Yukon XL Denali; Chevrolet Corvette; Hummer H1; Pontiac Solstice; and the Saturn Sky, Aura, and the VUE Green Line SUV.