Vehicle Platform

GMT-T1XX Vehicle Platform – Technical Specs & Info

For the development of its large full-size SUVs and pickup trucks, General Motors has a vehicle platform architecture called GMT-T1XX or also known as the T1 platform. The GMT-T1XX is basically a General Motors vehicle assembly code that supports all types of body-on-frame SUVs and pickup trucks which began production since the end of 2018, and then marketed as a 2019 model year.

Successor for the GMT-K2XX Platform…

The GMT-T1XX platform is a successor of the GMT-K2XX platform which was first introduced to the public in 2013 for its lineup of large SUVs and trucks from General Motors. While the GMT-T1XX platform can be found on the 2019 GMC Sierra and 2019 Chevrolet Silverado, and it will also be used by the upcoming 2020 Cadillac Escalade.

GMT-T1XX is a completely new platform engineered from the ground up to underpin full-size SUVs and pickup trucks, although there are also rumors that this platform will be used in mid-size SUVs. For additional information, “XX” is the placeholder for the last two digits of the specific assembly code for each vehicle powered by this platform. For example, the GMC / Chevy Suburban which has a T1YC vehicle assembly code.

GMC Sierra at its assembly plant

GMC Sierra at its assembly plant

It Utilizes More Aluminum Body Panel Material…

The GMT-T1XX platform utilizes most of the aluminum body panel material in order to reduce its weight, rather than steel material which can actually increase vehicle weight. According to a recent report, General Motors has plans to reduce the total number of their vehicles platforms to just four platforms starting in 2025. While the T1XX platform is expected to replace the GMT 600 platform which underpin the current Chevy Express since its first production in 1995.

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The GMT-T1XX platform supports a wide range of GM engines such as the 4.3-liter EcoTec3 V6 LV1 gasoline, 4.3-liter EcoTec3 V6 LV3 gasoline, 5.3-liter EcoTec3 V8 L83 gasoline, 5.3-liter EcoTec3 V8 L84 gasoline, 6.2-liter EcoTec3 V8 L86 gasoline, 6.2-liter EcoTec3 V8 L87 gasoline, 3.0-liter Duramax Inline-Six, and 6.6-liter Duramax V8 L5P engine. The T1XX platform also supports several GM transmissions, including an eight-speed automatic (8LXX) and ten-speed automatic transmissions (10LXX).

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