Engine, gas, 4 cylinder, L4, 2.7L, SIDI, VVT, turbo, DOHC, aluminum, TurboMax

Years 2019–20, 2022–26 Models 2 Factory citations 12

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Also described as Engine, 2.7L turbo

Also documented for Cadillac Chevrolet

Documented applications

Canyon — Third generation (VSS-T) (2023–2027)

2023–2026 Factory-verified

S on all trims; the 2024 guide adds 310 hp at 5600 rpm and 430 lb-ft of torque at 3000 rpm; in the 2027 list the TurboMax engine is L4B

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.11.
GM factory document — 2024 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2025 gmc canyon fleet order guide, p.6.
GM factory document — 2026 gmc canyon fleet order guide, p.8.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

gas L4, SIDI, VVT, DOHC, aluminum; TurboMax is the name in the 2025–2026 guides ("Engine, TurboMax")

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.11.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.12.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.12.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.12.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.14.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.12.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of L3B in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.