GMC's first large crossover vehicle, the all-new 2007 Acadia, will be one of the first products at General Motors Corp. to be built on the company's new Lambda platform, which also will underpin the new Buick Enclave and Saturn Outlook. The '07 Acadia will be introduced, along with the Outlook, in late 2006, with the Enclave to follow in spring 2007.

GM has not announced what engines will power the Acadia and its siblings, but executives say the Lambda platform can accommodate V-6 and V-8 powerplants.