AM General
In December 1999, AM General sold the brand name to General Motors, but continued to manufacture the vehicles. GM was responsible for the marketing and distribution of all civilian Hummers produced by AM General. Shortly thereafter, GM introduced two of its own design models, the H2 and H3, and renamed the original vehicle H1. AM General continued to build the H1 until it was discontinued in 2006, and was contracted by GM to produce the H2. The H3 was built in Shreveport, LA alongside the Chevrolet Colorado and GMC Canyon pickups, with which it shared the GMT-355 platform (modified and designated GMT-345). Hummer dealership buildings featured an oversized half Quonset Hut style roof, themed to the Hummer brand's military origins.