GMT T1XX platform

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]

Main article: List of GM platforms
GMT T1XX
Overview
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
LayoutFR/AWD
Body style(s)4-door SUV
4-door extended SUV
2-door pickup truck
4-door pickup truck
Powertrain
Engine(s)in development
Transmission(s)in development
Chronology
PredecessorGMT K2XX
SuccessorVSS-T

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]

Vehicles
Basic platformYearsModelNotesCodeIntroductionProductionSale
GMT1XX2019-Chevrolet SilveradoRegular Cab
Double Cab
Crew Cab		GMT1RC
GMT1EC
GMT1CC		January 2018Silao
Fort Wayne
Flint		Fall 2018
GMC SierraGMT1RG
GMT1EG
GMT1CG
2019-Chevrolet Silverado HDGMT1HCJune 2019
GMC Sierra HDGMT1HG
2020-Chevrolet Tahoe4-door SUVGMT1UCDecember 10, 2019Arlington December 2019Spring 2020
GMC YukonGMT1UGJanuary 14, 2020Summer 2020
Cadillac EscaladeGMT1XLFebruary 4, 2020Fall 2020
Chevrolet Suburban4-door extended SUVGMT1YCDecember 10, 2019Spring 2020
GMC Yukon XLGMT1YGJanuary 14, 2020Summer 2020
Cadillac Escalade ESVGMT1XLApril 2020Fall 2020

References
  1. 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. 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.
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