Buck:
Kind of misstated on the Humvee sale to China. I now believe that in 2009 GM sold the Humvee line of vehicles (not the entire AM General company) to a company in China. The New York Times identified the buyer of the Hummer truck unit as China-based Sichuan Tengzhong Heavy Industrial Machinery Company Ltd.. However, the rest of the saga is even more interesting. The latest that I have found on the deal is that today there are three Chinese companies manufacturing the vehicle in China. Interestingly, GM (??) or someone in Detroit is supposedly exporting the H1 frames and/or chassis to them for completion over there. From what I've found there are at least three Chinese automobile manufacturers building Humvee clones. One of these, the Dongfeng "Hanma" rely on imported U.S. made parts including Hummer H1 chassis and GM V8 6.5L diesel engines. These clones are currently made for the Chinese market.
I believe that AM General is still in business in Indiana as you mention, but I believe that they are making the current version of the Humvee that was used in Iraq and Afghanistan
AM General, as noted, was sold to American interests in 1983. This was required as the French state-owned NGO, Renault, owned a majority interest in American Motors, parent of AM General. AMG had contracts with the Humvee, the Postal vehicle of the time (made through 1984) and more-traditional military trucks. The contracts were closed to foreign-owned corporations, so the option was to cancel the contracts (and turn Humvee manufacturing over to someone else), sell AM General, or have Renault sell American Motors.
A Renault sale would have meant immediate bankruptcy for AMC, so AM General was sold. To, of all people, LTV corporation.
It's been passed around since then, but it remains independent of other auto or truck makers.
The Hummer line was another issue. AM General tried to market the civilian Humvee for several years, with little market penetration. They had few dealers and no advertising. GM came forward, and offered a deal: They would buy rights to market the Humvee (as Hummer H1) and hold the name, Hummer, as their division. The Humvee, civilian and military, would continue to be made in South Bend by AM General.
The Hummer H2 and later H3 would be based on GM SUVs, and made by GM. All advertising, dealer recruitment, etc, would be done by GM.
When GM wound up in bankruptcy, the receivers tried to sell the Hummer brand to China - but there were no buyers. It remained a GM property, a dormant brand, until this battery-car idiocy emerged.