Engine, 2.7L TurboMax

Years 2027 Models 2 Factory citations 3

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Also described as Engine, TurboMax

Also documented for Chevrolet

Documented applications

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

2027 Factory-verified

S on all trims; the 2025 and 2026 lists use L3B for the TurboMax engine

GM factory document — 2027 gmc canyon fleet order guide, p.8.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation 3SB: included in the trim group, upgradeable; Elevation 3VL: S; AT4, AT4X, Denali, Denali Ultimate: not offered; 350 hp (261 kW) at 5200 rpm and 455 lb-ft (617 Nm) at 3000 rpm; pairs with MQC and the 3.42 axle (GU6) in the Regular, Double and Crew Cab tables

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.7.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of L4B in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.