What is the specs of the 2020 Silverado 3500 6.6 gas?
The 2020 Chevrolet Silverado 3500 with the 6.6-liter gas engine is a powerful and capable heavy-duty pickup truck. It offers a range of impressive specifications and features that make it a popular choice for those who need a reliable and versatile work vehicle.
Engine and Powertrain
The 2020 Silverado 3500 6.6 gas is powered by a 6.6-liter V8 engine that produces 401 horsepower and 464 lb-ft of torque. This engine is paired with a 6-speed automatic transmission that provides smooth and efficient power delivery.
Towing and Hauling Capacity
The Silverado 3500 6.6 gas is designed for heavy-duty work, with a maximum towing capacity of 20,000 pounds and a maximum payload capacity of 7,442 pounds. This makes it an excellent choice for those who need to tow large trailers, haul heavy loads, or tackle demanding job sites.
Exterior and Interior Features
The 2020 Silverado 3500 6.6 gas features a rugged and modern exterior design, with available features like LED headlights, a chrome grille, and a variety of wheel options. Inside, the cabin offers a spacious and comfortable interior, with available features like leather-appointed seating, a premium audio system, and advanced infotainment technology.
Safety and Technology
The Silverado 3500 6.6 gas comes equipped with a range of advanced safety features, including forward collision alert, lane departure warning, and a rear vision camera. It also offers a variety of technology features, such as Apple CarPlay, Android Auto, and a 4G LTE Wi-Fi hotspot, to keep you connected and entertained on the road.
Overall, the 2020 Chevrolet Silverado 3500 6.6 gas is a powerful and capable heavy-duty pickup truck that offers a compelling combination of performance, utility, and technology. Whether you're tackling tough job sites or embarking on a long-haul towing adventure, the Silverado 3500 6.6 gas is a reliable and versatile choice.
How many miles per gallon does a 2020 Silverado 6.6 get?
Fuel Economy and Real-World MPG
We tested the Silverado 2500HD with the gasoline 6.6-liter V-8 and it earned 14 mpg on the highway. For comparison, we tested an F-250 with the gas-fed 6.2-liter V-8 and six-speed automatic transmission and it returned 15 mpg in the same test.
What year should I have my Chevy Silverado 3500 to avoid?
Years to potentially avoid for a Chevy 3500 include the 2011-2016 (LML engine) due to common, catastrophic CP4 fuel pump failures, and the 2008-2013 generation for general electrical and transmission issues. Other problematic model years are the 2014-2015, which had many recalls, and 2007-2010 (LMM engine) due to emissions system and potential piston issues.
Engine and fuel system
- 2011-2016 (LML Duramax): Prone to catastrophic failure of the high-pressure fuel pump (CP4), which contaminates the entire fuel system and can cost thousands to repair. This issue is often linked to low fuel lubricity.
- 2007.5-2010 (LMM Duramax): Emissions control parts and an injector configuration can lead to pistons cracking under certain conditions, especially with modifications.
- 2007 (Non-Classic): Reported problems include excessive oil consumption and issues with the fuel system.
You can watch this video to learn more about the CP4 fuel pump failure: 54sTruck MasterYouTube · Sep 4, 2021
General and other issues
- 2008-2013: The second generation of the 3500HD has a higher number of complaints, with a focus on electrical and transmission problems.
- 2012-2013: Suffered from engine and transmission issues, and were the last of the second generation before the redesign.
- 2014-2015: The first two years of the new generation had a high number of recalls and issues, particularly with the transmission, electronics, and air conditioning.
You can watch this video to learn more about the worst years of the Chevy Silverado: 47sCar ExpertlyYouTube · Jun 4, 2025
What is the towing capacity of the 2020 Silverado 3500 6.6 gas engine?
17,400 pounds
Here's what you'll be able to tow or haul with each model's standard gasoline engine: Silverado 3500 HD with 6.6L V8 (Gas) – Towing Capacity of 17,400 pounds, Payload of 7,442 pounds. F-350 with 6.2L V8 (Gas) – Towing Capacity of 16,700 pounds, Payload of 7,850 pounds.
What is the specs of the 2020 Chevy 3500 6.6 gas transmission?
6.6L V8 Gasoline
The new 6.6L V8 gas engine produces 401 hp and 464 lb-ft of torque at 4,000 rpms. It features Direct Injection and Variable Valve Timing and is paired with a 6-speed automatic transmission. The 6-speed automatic also features Auto Grade Braking just like the 10-speed Allison transmission.
