The first Hummer, marketed in 1992, was a civilian version of the military M998 Humvee. The brand, originally sold by AM General, was purchased by General Motors in 1998, who then sold three models: the H1, H2 and H3. The H1 was based on the Humvee while the H2 and H3 were based on smaller consumer vehicles.
After struggling through the recession in 2008 and facing numerous bids for the brand that, for various reasons, ultimately fell out, GM announced it would discontinue the brand in February 2010. A few offers were still made through April, but all ultimately failed to take off. The last Hummer H3 rolled off the line on May 24, 2010.
AM General, the original maker of the vehicle, lost a bid to build a replacement for the military Hummer in 2015, but later announced it planned to revive the brand by making a civilian model version named "V1 Gorilla."
Information and video courtesy of the King Rose Archives channel.