GMT K2XX

Main article: List of GM platforms

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 placeholder 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.^[2][3] 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 Silao Assembly in Mexico for the crew cab light duty pickups.

GMT K2XX
Overview
Manufacturer	General Motors
Production	Trucks: April 2013-October 2019 Extended length SUVs: December 2013-December 2019 SUVs:January 2014-December 2019
Body and chassis
Class	Full-size pickup truck/SUV
Layout	FR/4WD
Body style(s)	4-door SUV 4-door extended SUV 2-door pickup truck 4-door pickup truck
Powertrain
Engine(s)	LV3 EcoTec3 4.3 L V6 285 hp (213 kW)[1] L83 EcoTec3 5.3 L V8 355 hp (265 kW)[1] L86 EcoTec3 6.2 L V8 420 hp (313 kW)[1] LY6 Vortec 6.0 L V8 360 hp (268 kW) LML Duramax 6.6 L V8 397 hp (296 kW) L5P Duramax 6.6 L V8 445 hp (332 kW)
Transmission(s)	6-speed 6L80 automatic[1] 8-speed 8L90 automatic
Dimensions
Wheelbase	116.0 in (2946 mm)
Chronology
Predecessor	GMT900
Successor	GMT T1XX

The first GMT K2XX vehicles produced were the light-duty 2014 model year Chevrolet Silverado and GMC Sierra full-size pickups, with Silao producing the crew cabs first, followed afterwards by Fort Wayne assembling the light and HD regular size and double cab versions. The 2015 Chevrolet Tahoe, Chevrolet Suburban, GMC Yukon, GMC Yukon XL, Cadillac Escalade, and Cadillac Escalade ESV full-size SUVs were the next vehicles to start production,^[4][5] followed by the 2015 Chevrolet Silverado HD and GMC Sierra HD.

The K2XX platform marks the first time that no Sport Utility Trucks, hybrid trucks and hybrid SUVs will be built on this platform, as the Chevrolet Avalanche and Cadillac Escalade EXT SUTs, and the hybrid versions of the Silverado, Sierra, and full-size SUVs were discontinued after the 2013 model year.^[6] However, fuel economy of GMT K2XX vehicles will still increase over the GMT 900 predecessors thanks to usage of new Generation V/EcoTec3 V8 engines with direct injection, weight savings from the use of more high-strength steel, and the use of the 8L90 automatic transmission. Turbocharged and diesel engines for light-duty models are also under consideration for future GMT K2XX trucks and SUVs.

There have been customer complaints relative to 8L90 driveline vibrations in the K2XX platform dubbed the "Chevy Shake".^[7]

The K2XX was replaced by the GMT T1XX beginning in the 2019 model year.

Applications

• 
  2015 Chevrolet Suburban
• 
  2015 GMC Yukon XL Denali
• 
  2015 Chevrolet Tahoe
• 
  2015 GMC Yukon
• 
  2014 Chevrolet Silverado
• 
  2014 GMC Sierra
• 
  2015 Cadillac Escalade ESV

Basic platform	Years	Model	Notes	Code	Introduction	Production	Sale
GMTK2XX	2014-2018	Chevrolet Silverado	Regular Cab Double Cab Crew Cab	GMTK2RC GMTK2EC GMTK2CC	September 26, 2013 at The Texas State Fair	Silao Fort Wayne Flint	Fall 2013
		GMC Sierra		GMTK2RG GMTK2EG GMTK2CG
	2015-2019	Chevrolet Silverado HD		GMTK2HC			January 2014
		GMC Sierra HD		GMTK2HG
	2015-2020	Chevrolet Tahoe	4-door SUV	GMTK2UC	September 12, 2013	Arlington December 1, 2013	February 2014
		GMC Yukon		GMTK2UG
		Cadillac Escalade		GMTK2UL	October 7, 2013		April 2014
		Chevrolet Suburban	4-door extended SUV	GMTK2YC	September 12, 2013		February 2014
		GMC Yukon XL		GMTK2YG
		Cadillac Escalade ESV		GMTK2YL	October 7, 2013		April 2014
	2019	Chevrolet Silverado LD	Double Cab

See also

• GM GMT platform

References

1. "2008 Silverado Standard Features & Options". GM. 2013-05-05. Retrieved 2013-05-07.
2. GM K2XX Vehicle Platform from GM Authority
3. From Supercars
4. "GM Arlington Plant Prepares For Big SUV Launch" from Dallas Morning News (December 2, 2013)
5. "General Motors Arlington plant begins shipping 2015 full-size SUVs" Archived 2016-08-07 at the Wayback Machine from Dallas Morning News (February 7, 2014)
6. "GM announces end of Chevy Avalanche with Black Diamond edition". Autoblog. 13 April 2012. Archived from the original on 16 April 2012. Retrieved 13 April 2012.
7. "Mysterious, Unfixable 'Chevy Shake' Affecting Pickup Trucks Too » AutoGuide.com News". AutoGuide.com News. 2016-03-30. Retrieved 2017-10-20.