GMT T1XX platform

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2019 Chevrolet Silverado 1500 Crew Cab LT (front), 10.20.19.jpg
ManufacturerGeneral Motors
Production2018–present (Trucks)
January 2020-present (Extended length SUV’s)
May 18, 2020-present (SUV’s)
Body and chassis
ClassFull-size pickup truck/SUV
Body style(s)4-door SUV
4-door extended SUV
2-door pickup truck
4-door pickup truck
Engine(s)in development
Transmission(s)in development
PredecessorGMT K2XX

The GMT T1XX is the assembly code for a vehicle platform architecture in development by General Motors for its line of full-size trucks and large SUVs that has been announced to start production in the fall of 2018 for the 2019 model year.[1] The "XX" is a place holder for the last two digits of the specific assembly code for each model. As an example, the project code for the Suburban is T1YC.[2] The platform replaced the GMT K2XX series that was introduced in April 2013 for the trucks, followed by the December 2013 production of large SUVs.[3][4]

The vehicles are expected to make some use of aluminum body panels as a weight-saving measure.[2]

Production of the pickups (which was introduced in January 2018 with a preview of the 2019 model year Chevrolet Silverado), and was followed by GM's full-size sport-utility vehicles that were introduced in 2019 for the 2021 model year, and will go on sale in the Spring of 2020.[1] In line with GM's plan to reduce its total number of platforms to four by 2025, the T1XX platform is also expected to include an eventual replacement for the current model of Chevrolet Express which has been in production since 1995 based on the GMT 600 platform.[5][2]


Basic platform Years Model Notes Code Introduction Production Sale
GMT1XX 2019- Chevrolet Silverado Regular Cab
Double Cab
Crew Cab
January 2018 Silao
Fort Wayne
Fall 2018
2019- Chevrolet Silverado HD GMT1HC June 2019
2020- Chevrolet Tahoe 4-door SUV GMT1UC December 10, 2019 Arlington December 2019 Spring 2020
GMC Yukon GMT1UG January 14, 2020 Summer 2020
Cadillac Escalade GMT1XL February 4, 2020 Fall 2020
Chevrolet Suburban 4-door extended SUV GMT1YC December 10, 2019 Spring 2020
GMC Yukon XL GMT1YG January 14, 2020 Summer 2020
Cadillac Escalade ESV GMT1XL April 2020 Fall 2020


  1. ^ a b Lienert, Paul; Klayman, Ben (28 Jul 2014). "GM moves next version of big pickups ahead by nine months - sources". Reuters. Detroit: Reuters. Retrieved 14 June 2017.
  2. ^ a b c Brooks, Glen. "ANALYSIS - future Chevrolet SUVs & pick-ups". just auto. Retrieved 1 August 2017.
  3. ^ GM K2XX Vehicle Platform from GM Authority
  4. ^ From Supercars
  5. ^ Klayman, Ben; Lienert, Paul (2 Oct 2014). "GM's 2025 platform plan: Simplify and seek to save billions". Reuters. Detroit: Reuters. Retrieved 14 June 2017.