GMT K2XX is an assembly code for a vehicle platform architecture developed by General Motors for its line of full-size trucks and large SUVs that started production with the 2014 model year. The "XX" is a place holder for the last two digits of the specific assembly code for each model. The platform, which replaced the GMT900 series that had been in production from 2007 to 2013, was introduced in April 2013 for the 2014 Model Year on the trucks, followed by the December 2013 production on the 2015 large SUVs that debuted in February 2014. The GMT K2XX products are being produced at four GM assembly plants: Arlington (all SUVs), Flint (double and crew cab heavy-duty pickups), and Fort Wayne (regular and double cab light- and heavy-duty pickups) in the United States, along with in Mexico fo