GM GMT platform

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GMT is the designation prefix used for all General Motors truck, sport utility vehicle, and crossover SUV automobile platform applications. This includes both traditional body-on-frame trucks and newer unibody models.

GMT 001[edit]

The GMT 001 name is technically applied to the Chevrolet HHR, based on the GM Delta platform.

GMT 190[edit]

The GMT 190 name was applied to the Suzuki Vitara-derived Chevrolet Tracker.

GMT 191/192/193[edit]

The GMT 191/192 names are applied to the Chevrolet Equinox and similar Pontiac Torrent, respectively, while GMT 193 is used for the Suzuki XL7.

GMT 199[edit]

The GMT 199 names are applied to GM U-based minivans, includes the Chevrolet Lumina APV, Oldsmobile Silhouette and Pontiac Trans Sport were 1st made in 1990 to 1996. North American minivans were succeeded to GM U-body/GMT200.

GMT 200[edit]

The GMT 200 names are applied to the GM U-based minivans. These include the Chevrolet Venture, Oldsmobile Silhouette, Pontiac Trans Sport later Montana and Opel Sintra. North American minivans were succeeded to GM U-body/GMT201 in 2005.

GMT 201[edit]

The GMT 201 names are applied to the GM U-based minivans. These include the Chevrolet Uplander, Pontiac Montana SV6, Buick Terraza and Saturn Relay. North American vans were phased out in 2005 with the introduction of vehicles based on the GM Lambda platform.

GMT 250[edit]

A variation of the U-body used for the Pontiac Aztek and Buick Rendezvous crossover SUVs.

GMT 265/267[edit]

The GMT 265/267 is a crossover SUV platform based on the GM Sigma platform and used by the Cadillac SRX.

GMT 325/330[edit]

The GMT 325/330 series was a compact truck line including mid-size pickup trucks and SUVs. It debuted in 1981, though it was not given its GMT name until the late 1980s when the new GMT 400 was introduced. The GMT 325/330 was GM's compact truck and SUV line, designated by an S (RWD) or T (4WD/AWD).

GMT 345[edit]

The GMT 345 is the derivative of this platform as used on the Hummer H3.

GMT 345 Applications:

GMT 355[edit]

The GMT 355 is the redesigned S/T compact pickup truck design and the successor to the GMT 325 series. GMT 355s are built in Shreveport, Louisiana and Rayong, Thailand. GMT 355 uses an A-arm independent suspension in front and live axle with leaf springs in the rear. The Atlas straight-4 and straight-5 engines are widely used, starting in 2009, a 5.3L V8 was added. A 4-speed automatic and 5-speed manual transmission are also specified.

The GMT 355 platform was actually a joint-venture with Isuzu, though most of the design was done by Isuzu. Part of the agreement was that GM had to sell it first in the U.S., to be sold legally as an Isuzu. Despite its close numbering to the GMT 360 series, the two programs share nothing.

GMT 355 Applications:

GMT 360[edit]

The GMT 360 debuted in 2001 with the Chevrolet TrailBlazer, GMC Envoy, and Oldsmobile Bravada, as the next generation S/T mid-size SUVs. While it replaced the GMT 330, it shared nothing with the older platform. It used hydroformed frame rails like the larger GMT 800, and was built for GM's Atlas inline engines. The GMT 360 (and the long-wheelbase GMT 370) went on to be one of the most rebadged GM products with six different marques represented.

The 360 uses an independent suspension in front. In the rear, the Ascender and TrailBlazer use a 5-link rear suspension, while the rest have an air suspension. A 4-speed automatic is the only transmission available.

Prior to GM's 2009 bankruptcy, all GMT 360 products were discontinued and the Moraine, Ohio plant that produced the GMT 360 series was closed. Simultaneous with the cancellation of the GMT 360 program, development of the GMT 361 replacements were also suspended. A new body-on-frame midsize SUV retaining the Chevrolet TrailBlazer name and built in Thailand was launched as part of the GMT 700 program; however, it will not be sold in North America, as the GM Lambda platform crossovers are considered by General Motors to fill the market's need.


GMT 400[edit]

The GMT 400 and similar GMT 480 is the platform for the 1988-1998 full-size pickup truck platform. However, the C/K 2500 and 3500 series pickup trucks are designated GMT400 through the model year 2000. The GMT 410, GMT 420, GMT 425, and GMT 430 were used for full-size SUVs from 1991 to 1999. This was the first GMT designation for the C (RWD) and K (4WD/AWD) full-size trucks and SUVs.

GMT 400 frames were built by A.O. Smith Automotive Products, Dana Holding Corporation, and Tower Automotive.


GMT 510[edit]

The GMT 510 series were to be based on the GM Lambda platform, and hence are unibody vehicles, rather than vehicles with frames, and are unrelated to the GMT 530/560 series. They would have complemented the GMT 960 series, which are Lambda sport wagons. Due to poor sales of all U-Body vans, this series has been cancelled.

GMT 530/560[edit]

The GMT 530 series of trucks are medium-duty commercial trucks, such as the 1990-2002 Chevrolet Kodiak and GMC Topkick. The GMT 560 platform is the one of the 2003-2009 Kodiak/Topkick trucks.

GMT 600[edit]

The GMT 600 was used in the full-size Chevrolet Express vans for model years 1996-2002. The updated GMT 610 version is used for model years 2003-present.


GMT 700[edit]

The GMT 700 platform provides the replacements for both the GMT 355 midsize pickups and GMT 360 midsize SUVs. Most GMT 700s for the global market are built in Rayong, Thailand, though North American market models will be made at GM's Wentzville, Missouri plant alongside the GMT 600 vans from the 2014 model year onward. Subsequently, the GMT 355 plant in Shreveport, Louisiana will be closed. Both the global and North American models are made at CAMI's Ingersoll, Ontario plant.


GMT 745[edit]

GMT 800[edit]

The GMT 800 and similar GMT 880 was the basis for the 1999-2007 Chevrolet Silverado full-size pickup truck. The derived GMT 820 and GMT 830 was used in the Suburban, among other full-size SUVs. This is the successor to the GMT 400 series of C/K pickups and SUVs.


GMT 900[edit]

2007 GMT900 Cadillac Escalade

The GMT 900 debuted at the 2006 North American International Auto Show, as the next generation C/K full-size pickups and SUVs, and replacements for the GMT 800s. The first GMT 900 vehicle was the Chevrolet Tahoe, which arrived at dealers in January 2006. The GMC Yukon (regular and Denali) and Cadillac Escalade soon followed. Chevrolet Avalanches and Suburbans, GMC Yukon XLs, and Cadillac Escalade ESV and EXT were at dealers July 2006.


GMT 960[edit]

The GMT 960 series are based on the GM Lambda platform, and hence are unibody vehicles, rather than vehicles with frames, and are unrelated to the GMT 900 series.


GMT K2XX[edit]

Also known as the "Next Generation Full-Size Pickup" and "Next Generation Full-Size SUV" platform within General Motors, the GMT K2XX is the replacement for the GMT 900 series. The K2XX platforms went into production in the summer of 2013.

The first GMT K2XX vehicles were light-duty 2014 model year Chevrolet Silverado and GMC Sierra full-size pickups. The 2015 Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, GMC Yukon XL, Cadillac Escalade, and Cadillac Escalade ESV full-size SUVs followed, then the 2015 Chevrolet Silverado HD and GMC Sierra HD. Concurrent with the switch from GMT 900 to GMT K2XX, the Chevrolet Avalanche and Cadillac Escalade EXT were no longer produced. Hybrid versions of the Silverado, Sierra, and full-size SUVs were also discontinued. However, fuel economy of GMT K2XX vehicles increased over the GMT 900 predecessors thanks to usage of new Generation V/EcoTec3 V8 engines with direct injection and weight savings from the use of more high-strength steel. Turbocharged and diesel engines for light-duty models are also under consideration for future GMT K2XX trucks and SUVs.

Four plants build GMT K2XX products: Arlington Assembly (all SUVs), Flint Truck Assembly (double and crew cab heavy-duty pickups), and Fort Wayne Assembly (regular and double cab light- and heavy-duty pickups) in the United States, along with Silao Assembly in Mexico (crew cab light duty pickups). The first GMT K2XX vehicles produced were light-duty crew cabs built at Silao Assembly, followed shortly afterwards by light-duty regular and double cabs built at Fort Wayne Assembly.

External links[edit]