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GM T1 Vehicle Platform
The T1 platform, otherwise known as GMT-T1 or T1XX, is a General Motors vehicle architecture designed for pickup trucks and body-on-frame SUVs.
The T1 platform replaces the GM K2 platform and made its debut on the 2019 Chevrolet Silverado and 2019 GMC Sierra.
| Names: | GM T1 platform, GMT-T1, T1XX |
| Predecessor: | GMT-K2 platform |
| Successor: | GM VSS-T |
| Type: | Body on frame |
| Size: | Full Size |
| Supported vehicle type: | Pickup truck or SUV |
| Layout: | Front-Engine, 2WD (RWD) and 4WD |
| Powerplant layout: | Longitudial |
| Debut date: | 2019 model year, 2018 calendar year |
| Vehicles | |
| Chevrolet: | 2019+ Silverado, 2021+ Tahoe, 2021+ Suburban |
| GMC: | 2019+ Sierra, 2021+ Yukon, 2021+ Yukon XL |
| Cadillac: | 2021+ Escalade, 2021+ Escalade ESV |
| Buick: | none |
The T1 platform is brand new and engineered from the ground up to underpin full-size pickup trucks and SUVs.
It has been rumored that GM intended to utilize the T1 platform to underpin both its midsize and full-size body-on-frame pickup trucks and SUVs. However, the effort to underpin the mid-size models was scrapped. As such, the platform is now believed to be capable of supporting full-size body-on-frame models.
T1 support a wide range of GM’s four-, six-, and eight-cylinder GM engines and transmissions.
Engines
- Gasoline engines:
- Turbo 2.7L I-4 L3B
- EcoTec3 engine family:
- 4.3L V-6 LV3 EcoTec3
- 5.3L V-8 L82 EcoTec3
- 5.3L V-8 L84 EcoTec3
- 6.2L V-8 L87 EcoTec3
- 6.6L V-8 L8T
- Turbo-diesel Duramax engines:
Transmissions
- GM 8-speed automatic transmission (8LXX)
- GM 10-speed automatic transmission (10LXX)
- A new GM-designed and Allison-branded 10-speed automatic transmission for HD models
Applications of the T1 platform include:
Chevrolet
- Fourth-generation 2019 Chevrolet Silverado and newer
- Fifth-gen 2021 Chevrolet Tahoe and newer
- Twelfth-gen 2021 Chevrolet Suburban and newer
GMC
- Fourth-generation 2019 GMC Sierra and newer
- Fifth-gen 2021 GMC Yukon / 2021 GMC Yukon XL and newer
Cadillac
- Fifth-gen 2021 Cadillac Escalade / 2021 Cadillac Escalade ESV and newer
GM is working on a version of the T1 platform for Battery Electric Vehicles (BEVs). That version of the architecture is referred to internally as the BT1 platform, short for Battery T1.
