2025 Chevy Silverado 3500 Engine Specs
The 2025 Chevy Silverado 3500 Engine Specs define the heart of this heavy-duty truck, offering unmatched power and versatility for demanding tasks.
Whether you’re towing massive trailers, hauling equipment, or navigating tough terrain, the Silverado 3500’s engine lineup delivers.
Chevrolet has crafted two V8 engines to meet diverse needs, balancing raw strength with modern efficiency.
This in-depth guide explores the 2025 Chevy Silverado 3500 Engine Specs, their performance, and how they suit various workloads.
Why the 2025 Chevy Silverado 3500 Excels
The 2025 Chevrolet Silverado 3500 HD is a leader in the heavy-duty truck segment.
Its rugged design, cutting-edge technology, and powerful engines make it a top pick for professionals and adventurers.
The 2025 Chevy Silverado 3500 Engine Specs stand out, offering two V8 powertrains tailored to different demands.
Competing with trucks like the Ford F-350 Super Duty and Ram 3500, the Silverado 3500’s engine versatility gives it an edge.
Let’s dive into the engines and uncover what makes them exceptional.
Overview of 2025 Chevy Silverado 3500 Engine Specs
The 2025 Chevy Silverado 3500 Engine Specs feature two robust V8 engines: a 6.6L gasoline V8 and a 6.6L Duramax Turbo-Diesel V8.
Both are paired with a 10-speed Allison automatic transmission for smooth power delivery.
These engines are built for heavy-duty tasks, boasting impressive towing and payload capacities.
Below, we’ll break down each engine’s specifications and ideal applications to guide your decision.
6.6L Gasoline V8 Engine
The standard 6.6L gasoline V8 is a reliable workhorse in the 2025 Chevy Silverado 3500 Engine Specs.
It produces 401 horsepower at 5,200 rpm and 464 lb-ft of torque at 4,000 rpm.
This engine is perfect for drivers seeking power without the higher cost of diesel.
It supports towing up to 18,700 pounds when properly equipped, ideal for moderate loads.
Its pushrod 16-valve design ensures longevity and consistent performance.
While fuel economy isn’t EPA-rated due to the truck’s weight, it’s respectable for its class.
The gas V8 is standard across all trims, from the Work Truck (WT) to the premium High Country.
It’s a budget-friendly choice for those who don’t need extreme towing capabilities.
6.6L Duramax Turbo-Diesel V8 Engine
The 6.6L Duramax Turbo-Diesel V8 is the powerhouse of the 2025 Chevy Silverado 3500 Engine Specs.
It delivers 470 horsepower at 2,800 rpm and an impressive 975 lb-ft of torque at 1,600 rpm.
Its low-end torque makes it perfect for towing, with a maximum capacity of up to 36,000 pounds in specific configurations.
Paired with the Allison 10-speed transmission, it ensures seamless gear shifts.
This engine excels in demanding tasks like towing large trailers or hauling heavy equipment.
Real-world fuel efficiency is superior to the gas V8, especially under load.
Available across all trims, the diesel comes at a higher cost but is worth it for heavy-duty needs.
For more details, visit Chevrolet’s official Silverado 3500 page to explore configurations.
Transmission and Drivetrain Integration
Both 2025 Chevy Silverado 3500 Engine Specs are paired with an Allison 10-speed automatic transmission.
This transmission is renowned for its durability and precision, enhancing towing performance.
It features Electronic Precision Shift for smooth gear changes under heavy loads.
The Silverado 3500 offers rear-wheel drive (RWD) as standard, with four-wheel drive (4WD) available for better traction.
The 4WD system includes a two-speed transfer case, ideal for off-road conditions.
This combination ensures efficient power delivery, whether on highways or rugged job sites.
Performance and Towing Capabilities
The 2025 Chevy Silverado 3500 Engine Specs are engineered for extreme workloads.
The gasoline V8 offers reliable performance, with a payload capacity of up to 7,442 pounds in dual-rear-wheel setups.
It accelerates to 0-60 mph in about 7.0 seconds, impressive for a heavy-duty truck.
The Duramax diesel is the standout for towing, handling up to 36,000 pounds with ease.
Its 975 lb-ft of torque ensures stability, even on steep inclines with loads up to 32,000 pounds.
Chevrolet’s trailering technology, including a hitch platform, trailer brake controller, and advanced camera systems, simplifies towing.
The truck’s chassis and suspension are tuned for stability, ensuring confident handling.
Learn more about towing tech in our guide to 2025 Silverado 3500 towing features.
Fuel Efficiency and Operating Costs
Fuel efficiency is a key factor for heavy-duty truck buyers.
The 2025 Chevy Silverado 3500 Engine Specs aren’t EPA-rated due to their weight, but real-world data offers clarity.
The 6.6L gasoline V8 consumes more fuel than the diesel, especially when towing.
It’s best for shorter trips or lighter tasks to keep costs down.
The 6.6L Duramax Turbo-Diesel V8 offers better efficiency, particularly for long hauls or heavy loads.
Owners report lower fuel costs over time, making it ideal for frequent heavy-duty use.
To optimize efficiency, avoid rapid acceleration, maintain steady speeds, and follow maintenance schedules.
For maintenance tips, check Chevrolet’s service guide.
Trim Levels and Engine Availability
The 2025 Silverado 3500 comes in Work Truck (WT), LT, LTZ, and High Country trims.
The 2025 Chevy Silverado 3500 Engine Specs are available across all trims, with the diesel as an upgrade.
The WT trim, starting at $48,495, includes the gasoline V8 as standard.
The LT trim adds a 13.4-inch touchscreen and trailer brake controller, ideal for diesel buyers.
The LTZ and High Country trims offer luxury features like leather interiors and advanced tech.
A new Trail Boss package enhances off-road capability with all-terrain tires and skid plates, compatible with both engines.
Explore trim options in our article on 2025 Silverado 3500 trim comparisons.
Comparing the Silverado 3500 to Rivals
The 2025 Chevy Silverado 3500 Engine Specs compete with the Ford F-350 Super Duty and Ram 3500.
The F-350 offers a higher tow rating of 28,000 pounds with its diesel and a modern interior.
The Ram 3500 leads with a 34,000-pound tow capacity and luxurious cabins in top trims.
However, the Silverado 3500’s Duramax diesel matches or exceeds rivals in torque, and its Allison transmission is unmatched for reliability.
The gasoline V8 provides strong performance at a lower price than competitors’ base engines.
Consumer feedback, with 88% of owners recommending it, highlights its comfort and towing ease.
For competitor insights, see MotorTrend’s heavy-duty truck comparison.
Choosing the Right Engine for You
Selecting from the 2025 Chevy Silverado 3500 Engine Specs depends on your needs.
The 6.6L gasoline V8 suits budget-conscious buyers or those with moderate towing requirements.
Its lower cost and solid performance make it practical for small businesses or occasional tasks.
The 6.6L Duramax Turbo-Diesel V8 is ideal for professionals towing frequently or handling heavy loads.
Its torque, towing capacity, and efficiency justify the premium for demanding jobs.
Consider fuel costs, maintenance budgets, and driving conditions when deciding.
For a deeper dive, read our guide on gas vs diesel for Silverado 3500.
Conclusion
The 2025 Chevy Silverado 3500 Engine Specs offer unmatched versatility for heavy-duty truck buyers.
The 6.6L gasoline V8 delivers reliable power at a lower cost, perfect for moderate tasks.
The 6.6L Duramax Turbo-Diesel V8 provides exceptional torque and towing for demanding jobs.
Both engines, paired with the Allison 10-speed transmission, ensure top performance.
Whether you prioritize cost, power, or efficiency, the Silverado 3500 has an engine for you.
Test drive at your local dealer or visit Chevrolet’s Silverado 3500 page for more.