Hummer is onomatopoeic. Hummer represents a range of roaring, road-hogging humdinger, big trucks and SUVs. Hummer has its roots in military trucks and its 'civilian' worthy brand of trucks and SUVs was first marketed in 1992 when the heavy vehicle manufacturer AM General began selling a civilian version of the M998 Humvee. In 1998, General Motors purchased the brand name and marketed three vehicles: the original Hummer H1, based on the Humvee; and the H2 and H3 models. By 2008, Hummer's 'guzzling' viability came under question in a time of economic recession and it was placed under review by GM management. A year later in 2009, a Chinese manufacturer, Sichuan Tengzhong Heavy Industrial Machinery Company, announced that it would acquire Hummer, pending government approvals, but later withdrew its bid. After filling a rental-car fleet order, the last Hummer H3 trundled off the assembly line at Shreveport on May 24, 2010.