2025 GMC Yukon Denali

Small-Block (EcoTec3 L87)

6.2L Naturally Aspirated V8

The deep-chested heart of the Yukon Denali: a naturally aspirated 6.2-liter small-block making 420 hp and 460 lb-ft, delivering effortless low-rpm pull and the unmistakable burble of a big American V8.

The L87 belongs to GM's Gen-5 small-block family branded EcoTec3, an all-aluminum, direct-injected lineage descended from the legendary Chevrolet small-block, succeeding the earlier L92 truck V8.

• Its Dynamic Fuel Management can run on any of 17 different cylinder patterns, recalculating the optimal firing combination roughly every 125 milliseconds.
• Despite its size it is built entirely from aluminum to keep weight down in heavy SUVs and trucks.
• It carries forward a small-block bloodline that traces back to GM's 1955 V8, one of the longest-running engine architectures in the industry.