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GM Reveals 2027 Silverado, Sierra Sixth-Gen V-8s

By Drooid · Sep 17, 2026, 6:30 PM UTC · How we work

Summary

Story summary

General Motors unveiled sixth-generation small-block V-8 engines for the 2027 Silverado and Sierra trucks.
The 5.7-liter L76 produces 402 hp and 428 lb-ft, while the 6.6-liter L78 delivers 481 hp and 501 lb-ft.
All 2027 light-duty trucks will pair the new V-8s with a 10-speed automatic transmission.
GM calls the 6.6-liter L78 the most powerful naturally aspirated V-8 in its segment.
GM expects the upgraded trucks to maintain its six-year full-size truck sales lead.

History

Historical Context

Chevrolet introduced the 327 cu in small-block V8 in 1962, delivering up to 425 hp in the L-76 version and appearing in 1964 pickups such as the El Camino, which helped GM capture a larger truck market share. That power-upgrade pattern resurfaces in 2027 when GM unveils sixth-generation L76/L78 V8s for the Silverado and Sierra, now rated 402–481 hp.

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Story summary

General Motors unveiled sixth-generation small-block V-8 engines for the 2027 Silverado and Sierra trucks.
The 5.7-liter L76 produces 402 hp and 428 lb-ft, while the 6.6-liter L78 delivers 481 hp and 501 lb-ft.
All 2027 light-duty trucks will pair the new V-8s with a 10-speed automatic transmission.
GM calls the 6.6-liter L78 the most powerful naturally aspirated V-8 in its segment.
GM expects the upgraded trucks to maintain its six-year full-size truck sales lead.

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