AM General produced buses, large trucks, and Jeeps for industrial, military, and government use. In the late 1970s, it developed the High Mobility Multipurpose Wheeled Vehicle (HMMWV, nick-named "Humvee") for military use as a heavy-duty replacement for the jeep. The vehicle later became available in a civilian version sold under the Hummer brand name. Another familiar product from the AM General line was the JeepDJ-5 series—a purpose built "Delivery Jeep" 2-wheel drive (RWD) version of the Jeep CJ-5—used in huge numbers as a right-hand drive mail delivery vehicle by the United States Postal Service.
AM General, which remains an independent company and government and military contractor, sold the rights to the Hummer name to General Motors in 1999 but continues to build the vehicles for GM. GM was sued early in 2003 by DaimlerChrysler, owners of the Jeep brand, for the Hummer's seven slot grille which resembled the design DaimlerChrysler argued consumers associated with Jeep vehicles. The lawsuit was dismissed due to the past corporate history involving AMC and Jeep. Production of the Hummer H1 (the "H1" designation differentiates it from the H2 and H3 that were derived from GM-developed platforms) was discontinued in June 2006.
On August 20, 2004, it was announced that Ronald Perelman's MacAndrews & Forbes Holdings company would form a joint venture with AM General's current owner, Renco Group, to give Perelman 70% ownership of AM General. The deal reportedly cost close to US$1 billion
In 1983, the LTV Corporation bought AM General from American Motors Corporation and established it as a wholly owned subsidiary of the LTV Aerospace and Defense Company.
In 1984, the AM General headquarters moved from the American Motors AMTEK Building in Southfield, Michigan to Livonia, Michigan, and two years later to South Bend, Indiana, where the primary manufacturing operations were located.
Production began at the Mishawaka, Indiana assembly plant in the fall of 1984 and the first deliveries were made in early 1985. The total production by mid-1991 was more than 72,000 vehicles including international sales.
In 1992, LTV sold AM General to The Renco Group, Inc., who in 2002 converted it to a limited liability company.
By March 1995 about 100,000 HMMWVs had been built. Since 1991, an additional 20,000 HMMWVs were ordered by international governments. To date, more than 190,000 units have been produced.
Late in 2000, AM General was awarded another production contract for 2,962 trucks in the M998A2 series. The contract contained six single-year options running to fiscal year 2007.
The Humvee offers exceptional speed, mobility and agility and is built upon a multi-purpose platform, which will accommodate a broad range of configurations. Humvees feature full-time four-wheel drive, independent suspension, steep approach and departure angles, 60 percent gradeability and 16 inches of ground clearance. Humvees are currently in use by the U.S. Army, Marine Corps, Air Force and Navy at locations throughout the United States and overseas.
The LSSV is a GM-built Silverado 2500 HD (or 3500 HD) and is powered by a Duramax 6.6 liter turbo diesel engine. The LSSV is available in a crew cab or standard cab. It can also be equipped with the Enhanced Mobility Package which adds underbody protection, a tire pressure monitoring system, and other upgrades.
Prior to the development of newer vehicles, such as the HMMVW, AM General also acquired contracts from the Department of Defense to build medium and heavy trucks for the armed forces. These included the M35 series of trucks and heavier 5-ton series of trucks.
At least two Chinese automotive companies are known to produce HMMWV copies/clones