2027 Chevy Silverado High Country Debuts with New Engine to Fix Lifter Issues

The next-generation Silverado High Country will feature an all-new Gen 6 Small Block V8 engine designed to improve fuel efficiency and reliability.

Published on Feb. 24, 2026

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General Motors is introducing a redesigned 2027 Chevy Silverado High Country with a new Gen 6 Small Block V8 engine that aims to address the lifter failure issues that have plagued owners of previous Silverado models. The new engine is expected to improve fuel efficiency by up to 12% and reduce greenhouse gas emissions by 10%. GM has invested hundreds of millions of dollars into its engine plants to develop this updated V8 powertrain.

Why it matters

The lifter failures and resulting repair costs of up to $8,000 have been a major pain point for Silverado owners over the past decade. This new engine design is GM's attempt to regain customer trust and loyalty in its full-size truck lineup, which competes directly with the Ford F-150 and Ram 1500.

The details

The 2027 Silverado High Country prototype spotted this week features a new Gen 6 Small Block V8 engine, with options expected to include 5.7L and 6.6L displacements. The engine is designed to fix the issues with the Active Fuel Management and Dynamic Fuel Management systems that have led to collapsed lifters, cylinder misfires, bent pushrods, and damaged camshafts. GM has invested $579 million into its Flint Engine Plant and $888 million into its Tonawanda Propulsion Plant to support the new V8 production.

  • A 2027 Chevy Silverado High Country prototype was spotted on February 23, 2026 sitting on a transport trailer.
  • GM is expected to reveal the full 2027 Silverado lineup in the second quarter of 2026.
  • Dealers should have inventory of the 2027 Silverado High Country by late 2026 for the 2027 model year.

The players

Chevy Silverado High Country

Chevrolet's top non-luxury trim level for the Silverado full-size pickup truck.

GM Authority

An automotive news publication that reported on GM's plans for the new Gen 6 Small Block V8 engine in January 2026.

Mark Reuss

The President of General Motors, who told investors in 2024 that the next-generation Silverado trucks will deliver 4% to 6% better efficiency than 2022 models.

Flint Engine Plant

A GM engine manufacturing facility in Michigan that received a $579 million investment for new V8 assembly, block machining, crankshaft production, and cylinder head manufacturing.

Tonawanda Propulsion Plant

A GM engine manufacturing facility near Buffalo, New York that received an $888 million investment, the largest single investment GM has ever made in an engine facility.

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What they’re saying

“The next-generation trucks will deliver 4% to 6% better efficiency than 2022 models.”

— Mark Reuss, President, General Motors (GM Authority)

What’s next

GM will reveal the full 2027 Silverado lineup, including the High Country trim, in the second quarter of 2026. Dealers are expected to have inventory of the 2027 Silverado High Country by late 2026 for the 2027 model year.

The takeaway

The 2027 Chevy Silverado High Country represents GM's attempt to regain customer trust and loyalty in its full-size truck lineup by addressing the longstanding lifter failure issues that have plagued previous Silverado models. The new Gen 6 Small Block V8 engine is designed to improve fuel efficiency, reduce emissions, and provide the reliability that Silverado owners have been seeking.