The Hummer brand began in 1992 with AM General's sale of a civilian variant of the M998 Humvee, which was originally used in combat situations. Hummers are large trucks and SUVs, and they were available in three different vehicles: the Hummer H1, the Hummer H2, and the Hummer H3. The H2 and H3 models were based on much smaller GM production vehicles, as opposed to the military variant. Unfortunately, Hummer production was ceased in 2009, and the brand was disassembled altogether by the year 2010.

The original military Hummers were first built in 1983-1985 in the Humvee variant by AM General Corporation. This production was under contract with the U.S.'s armed forces, and the first production generated 70,000 units. AM General had its sights set on selling a civilian variant of the vehicle beginning in the late '80s. This version of the Humvee, which was put into production partly through actor Arnold's Schwarzenegger's insistence, featured sound insulation, more luxurious upholstery, air conditioning, sound insulation, convenience and technology packages, and wood trim.

To prove the Humvee vehicles were worth producing, the Hummer company sent a matching set from London to Beijing, where they encountered rough roads along the way. The vehicles easily succeeded, due to the fact that they were built to specifically tackle off-road driving. This journey was highlighted on ESPN, but it would really be the Humvee's Desert Storm service during the Gulf War that grabbed the attention of the masses. Two years later, in 1992, the first "Hummer" (H1) went on sale on the market.

The Hummer H1 was followed by the Hummer H2 and Hummer H3. The H2 was built in two variations: The HT SUT and the H2 SUV. This was followed by the Hummer H3 and Hummer H3T truck, which were the smallest Hummer models built. They were both based on the same platform as the GMC Canyon and Chevy Colorado trucks, called the GMT355 platform. There was also a Hummer HX Concept car built in 2008, which was a two-door, off-road model. This concept was much smaller than all previous Hummer models. Hummer also had a hybrid model in the works, which would have used technology similar to the Chevy Volt's. This Hummer was showcased in 2009 and had the potential to go up to forty miles each day on battery power. At this point, an internal combustion engine would kick in and generate more power.

In 1999, Hummer had sold its brand to General Motors, but AM General still manufactured the automobiles. GM actually introduced the H2 and H3, but AM continued to produce the H1 until its discontinuation in 2006. The company also built the H2 model. By the time 2006 rolled around, Hummer was being sold in thirty-three countries and was produced in several different countries as well. Higher oil prices essentially killed the Hummer brand, which was discontinued when GM filed for bankruptcy in 2009. GM actually changed its mind, and sold to a Chinese company, but the deal buckled, and in 2010 the brand officially collapsed.