General Motors (GM) is one of the world's best-known automakers, and one of the best-loved in the United States of America. GM currently makes Cadillac, Oldsmobile, Saab, Hummer, Opel/Vauxhall, GMC, Buick, and Chevrolet cars. They are in serious financial trouble, and are currently courting the Renault/Nissan alliance, which also owns Dacia (of Romania) and a share in Samsung Motors (Korea.) GM has long exchanged technology with Toyota, and numerous Chevys are actually Toyotas in disguise, in particular the mid-year Chevy Nova which is actually a Toyota Corolla.
The "M561 GAMA-GOAT" is a dual-bodied centrally [articulated] six-wheeled vehicle, with [all wheel drive]. It is made of [aluminum] for light weight, and can slowly traverse calm bodies of water, as it is watertight. It was intended to carry [cargo]. Another variant, the M-792, was fitted as a portable [field hospital]. They have been available to firefighting and law enforcement agencies since  through the [Federal Excess Personal Property] program.