2026 GMC Yukon SLE

5.3L V8

5.3L V8

A modern small-block that blends old-school V8 torque and a muted burble with surprising fuel-saving trickery, hauling heavy trucks and SUVs with easy authority. Power delivery is broad and unstressed, exactly what work and towing demand.

Coded L84, this 5.3-liter EcoTec3 is the fifth generation of GM's small-block truck V8 lineage and the direct successor to the L83. It launched in the 2019 GMC Sierra and Chevrolet Silverado and is shared across the Yukon, Tahoe and Suburban.

• Its Dynamic Fuel Management can run on anywhere from one to eight cylinders across 17 different patterns, versus the older system's simple 8-or-4 split.
• It traces its design DNA directly back to GM's original 1955 small-block V8, one of the longest-running engine architectures in the industry.