GMT (General Motors Truck) is a nomenclature used by General Motors to designate multiple vehicle platforms. In use since the early 1980s, the GMT nomenclature is used for light trucks, full-size SUVs, and vans, along with several medium-duty trucks. With only a few exceptions, nearly all GMT vehicles use body-on-frame construction, along with rear-wheel drive (or all-wheel drive) powertrain configurations. Primary applications Primary applications of the platform – those that are equivalent in basic RWD/frame structure to each other – existed from 1981 to 1989, and again since 2018. Light trucks and SUVs Pickups and SUVs have been the main vehicles underpinned by GMT platforms, being involved for the entirety of the platform's existence. Fullsize GMT400 – Chevrolet C/K and variants, 1988 – 1998 GMT800 – Chevrolet Silverado and variants, 1999 – 2007 GMT900 – Chevrolet Silverado and variants, 2007.5 – 2013 GMTK2XX – Chevrolet Silverado and variants, 2013 – 2019 GMTT1XX – Chevrolet Silverado and variants, 2018–present Midsize GMT325 – Chevrolet S-10 and truck rebadgings, 1981 – 2012 GMT330 – Chevrolet S-10 Blazer and SUV rebadgings, 1982 – 2012 GMT355 – First-gen. Chevrolet Colorado and truck rebadgings, 2002 – present GMT360 – Chevrolet TrailBlazer and rebadgings, 2001 – 2009 GMT700, later GMT31XX – Second-gen. Chevrolet Colorado, 2012–present Hummer In contrast to the Hummer H1–designed and assembled by AM General, the Hummer H2 and Hummer H3 were developed by GM, receiving their own platform designations. Designated the GMT825, the H2 was derived from the GMT820 (Chevrolet Tahoe/GMC Yukon), with its own midsection frame design and a rear frame shared with the 2500-series GMT800 pickup trucks. The H3 SUV was designated the GMT345, a close variant of the GMT355 (Chevrolet Colorado/GMC Canyon). The 2009-2010 H3T pickup truck was designated as the GMT745, adopting a nomenclature closer in line with the GMT700 used by the later second-generation Colorado/Canyon. Vans The 1996 Chevrolet Express/GMC Savana replaced the previous G-series Van/Vandura, adopting the GMT600 designation. As part of a model update and revision for 2003, GM changed the Express/Savana to GMT610, which remains in use, the model line competes with the Ford Transit, and Ford E-Series (dependent on configuration), Mercedes-Benz/Freightliner Sprinter, Dodge Ram Wagon, and the Ram ProMaster (cargo van only). Medium trucks For 1990, the Chevrolet Kodiak/GMC TopKick medium-duty trucks adopted the GMT530 designation (sharing the cab of the GMT400 trucks). For 2003, the line was redesigned, becoming the GMT560 platform (sharing a