2027 Silverado Sierra Diesel: GM Bets on Efficiency

GM is doubling down on diesel power for its next-generation full-size pickups, targeting more than 900 miles of highway range while rivals expand their hybrid strategies.

GM chooses diesel for its next-generation pickups

General Motors is taking a different route from several competitors as it prepares the next-generation 2027 Chevrolet Silverado 1500 and GMC Sierra 1500. Instead of moving its light-duty pickups toward a hybrid-focused strategy, GM is continuing with the 3.0-liter Duramax Turbo-Diesel.

The redesigned trucks are expected to reach customers in late 2026. They represent a major update for two of GM’s most important vehicles in the U.S. pickup market. Chevrolet describes the Silverado as completely redesigned inside and out, while GMC is also introducing a new-generation Sierra with redesigned interiors and new technology.

The 2027 Chevrolet Silverado 1500 receives a completely redesigned exterior for the U.S. market.

The main argument behind GM’s decision is efficiency combined with truck capability. The automaker says the upgraded diesel, when combined with an available 34-gallon fuel tank, can provide a highway driving range of more than 900 miles. That figure is particularly relevant for owners who use their pickups for long-distance travel, towing or heavy-duty daily work.

The updated Duramax remains a major part of the Silverado and Sierra strategy. GM lists 305 horsepower and 495 lb-ft of torque, with the diesel paired with a 10-speed automatic transmission. The engine also receives several technical updates aimed at emissions performance, durability and overall operation.

Diesel versus hybrids in the U.S. pickup battle

GM’s strategy stands out because the full-size pickup segment is moving in several different directions. Ford continues to offer the F-150 PowerBoost full hybrid, while Ram is preparing its range-extended electric pickup strategy.

Ford’s current F-150 PowerBoost combines a 3.5-liter EcoBoost V6 with a hybrid system. The manufacturer lists 420 horsepower and an EPA-estimated 23 mpg combined rating for the 2026 F-150 PowerBoost 4×4 configuration.

Ram, meanwhile, has promoted the Ram 1500 REV, a range-extended electric pickup with a 92-kWh battery and a 130-kW generator. Ram projects up to 690 miles of total driving range for the truck.

GM’s approach is therefore based on extracting more efficiency from a conventional internal-combustion powertrain. The company argues that diesel technology can deliver a strong combination of fuel economy, torque and long-distance range without adding the complexity of a hybrid system.

The 2027 GMC Sierra 1500 also retains the Duramax 3.0L Turbo-Diesel in its next-generation lineup.

Diesel also has another advantage for pickup buyers: torque delivery. High low-end torque can be useful when towing trailers, carrying heavy loads and climbing steep grades.

That remains an important consideration in the U.S., where full-size pickups are frequently purchased for work as well as personal transportation. GM is not abandoning that traditional truck formula. Instead, it is updating the technology around it.

New V8 engines join the diesel

The diesel engine is not the only major powertrain change for the 2027 Silverado and Sierra. GM is also introducing a new generation of gasoline V8 engines.

The company has confirmed new 5.7-liter and 6.6-liter V8s, both part of its sixth-generation Small Block architecture. The 6.6-liter unit produces 481 horsepower, making it the most powerful naturally aspirated V8 in the segment according to GM. The new engines are paired with 10-speed automatic transmissions.

Chevrolet will continue offering four powertrain choices for the 2027 Silverado 1500, including the enhanced TurboMax, the Duramax diesel and the two new V8 engines. The lineup is expected to cover work-oriented models as well as higher-end versions such as High Country and off-road-focused ZR2 and Trail Boss trims.

That gives GM a broad powertrain strategy rather than a single solution. Buyers can choose between turbocharged gasoline power, diesel efficiency or traditional V8 performance.

Technology becomes another major selling point

The redesign also goes beyond the engine bay. GM is introducing a new user interface on both pickups, with a more modern digital environment designed around simpler controls and faster access to vehicle functions.

The Silverado can offer more than 60 inches of combined digital displays, including a 16.3-inch center screen and a 12.2-inch driver information display. Higher trims can also receive an 11.5-inch front passenger screen.

The new Silverado interior combines large digital displays with a redesigned dashboard and updated controls.

The GMC Sierra follows a similar technological path. Its next-generation cabin offers more than 60 inches of combined digital displays, along with a 16.3-inch center display and an available 11.5-inch passenger touchscreen. GMC is also adding features such as its new MultiPro center console and available Super Cruise with trailering.

For GM, the objective is clear: keep the traditional advantages of diesel and V8 power while adding the technology expected from a modern full-size pickup.

The 2027 Chevrolet Silverado and GMC Sierra are U.S.-market pickups, with both next-generation models scheduled to become available in late 2026. Their decision to retain diesel alongside new V8 engines puts GM on a distinct path as Ford and Ram expand electrified solutions in the full-size truck segment.