See main article: List of GM platforms.
| GMT T1XX | |
| Manufacturer: | General Motors |
| Production: | July 2018–present (Trucks) January 2020-present (Extended length SUVs) May 18, 2020-present (SUVs) |
| Predecessor: | GMT K2XX |
| Layout: | FR/4X4 (4WD) |
| Class: | Full-size pickup truck/SUV |
| Body Style: | 4-door SUV 4-door extended SUV 2-door pickup truck 4-door pickup truck |
| Similar: | Ford T platform Chrysler DR platform Nissan ZW platform Toyota T200 platform |
| Engine: | in development |
| Transmission: | in development |
The GMT T1XX is the assembly code for a vehicle platform architecture developed 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 placeholder 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.
Production of the pickups was introduced in January 2018 with a preview of the 2019 model year Chevrolet Silverado, followed by GM's full-size sport-utility vehicles that were introduced in 2019 for the 2021 model year that went on sale in the spring of 2020. 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]
| Basic platform | Years | Model | Notes | Code | Introduction | Production | Sale |
|---|---|---|---|---|---|---|---|
| GMT1XX | 2019- | Chevrolet Silverado | Regular Cab Double Cab Crew Cab | GMT1RC GMT1EC GMT1CC | January 2018 | Silao Fort Wayne Flint | Fall 2018 |
| GMC Sierra | GMT1RG GMT1EG GMT1CG | ||||||
| 2019- | Chevrolet Silverado HD | GMT1HC | June 2019 | ||||
| GMC Sierra HD | GMT1HG | ||||||
| 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 | GMT1UL | 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 | GMT1YL | April 2020 | Fall 2020 |