The 2020 GMC Sierra 3500HD is a heavy-duty pickup truck, part of the Sierra lineup that has been a staple for over two decades. As a third-generation model, it offers robust capabilities for demanding tasks. Available in various body styles including Regular Cab, Double Cab, and Crew Cab, and with short or long bed options, it caters to diverse needs. Key trims include the Pro (base), SLE, SLT, AT4, and the luxurious Denali. Pricing for a new 2020 model typically ranged from around $40,000 to over $80,000 depending on configuration. It stands out for its potent towing and hauling capacities, sophisticated interior options especially in higher trims like the Denali, and its strong presence, making it a popular choice for those who need uncompromising workhorse performance.
The Good
The 2020 Sierra 3500HD excels in brute strength with class-leading towing and payload capacities. Its refined interior, especially in higher trims, offers remarkable comfort for long hauls, appealing to practicality. The imposing design evokes power and capability, satisfying an emotional desire for a capable machine, while its robust build promises long-term reliability.
The Bad
Potential buyers should be aware of some reported issues concerning the Duramax diesel engine, particularly regarding exhaust fluid system problems and potential turbocharger issues. Some owners have also noted a less refined ride quality compared to some competitors, especially when unladen, and the infotainment system can occasionally be laggy.
2020 GMC Sierra 3500HD: Quick Overview
- Engine Options:
- 6.6L V8 Gasoline: Produces 401 horsepower and 464 lb-ft of torque. This engine is paired with a 6-speed automatic transmission.
- 6.6L Duramax V8 Turbo-Diesel: Produces 445 horsepower and 910 lb-ft of torque. This engine is paired with an Allison 10-speed automatic transmission. - Horsepower: As listed above, ranging from 401 hp to 445 hp.
- Fuel Economy: EPA estimates are not typically provided for heavy-duty trucks like the Sierra 3500HD due to their specialized nature and intended use, which often involves towing and heavy loads. Real-world fuel economy will vary significantly based on configuration, load, and driving conditions. Expect MPG to be in the single digits for towing and low double digits for highway driving.
- 0-60 Times: Official 0-60 mph times are not a primary focus for heavy-duty trucks. However, expect 0-60 times to be in the 8-10 second range for gasoline models and potentially slightly faster for diesel models when unladen, though this is highly dependent on configuration and driver.
- Towing Capacity: This is a key strength. When properly equipped, the 2020 GMC Sierra 3500HD can tow up to 35,500 pounds (fifth-wheel/gooseneck towing). Maximum conventional towing capacity is around 20,000 pounds. Payload capacity also varies but can exceed 7,000 pounds.
- Trim-Level Features:
- Pro: Basic work truck features, vinyl seating, durable interior, standard infotainment.
- SLE: Adds cloth seating, upgraded infotainment with a larger touchscreen, cruise control, keyless entry.
- SLT: Features leather upholstery, heated front seats, dual-zone automatic climate control, improved exterior styling.
- AT4: Off-road focused trim with unique styling, skid plates, Rancho shocks, all-terrain tires, and an available premium suspension package. Includes features from SLT.
- Denali: Top-tier luxury trim with premium leather, heated and ventilated front seats, navigation, Bose audio system, unique Denali styling, and advanced safety features.
2020 GMC Sierra 3500HD Specifications
Vehicle Information
| Year | 2020 |
| Make | GMC |
| Model | Sierra 3500HD |
| Trim | - |
| Style | Crew Cab 4WD |
| Type | Truck |
| Category | - |
Manufacturing Details
| Made In | - |
| Manufacturing City | - |
Dimensions
| Doors | 4-Door |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 6.6-L V-8 |
| Engine Size | 6.6L |
| Engine Cylinders | 8 |
| Transmission | 10-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 10-Speed |
| Drivetrain | Four-Wheel Drive |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 2020 GMC Sierra 3500HD Have?
The 2020 GMC Sierra 3500HD, while generally robust, has had some reported issues that potential buyers should be aware of. One of the more frequently discussed concerns revolves around the Duramax 6.6L V8 turbo-diesel engine. Some owners have reported problems with the Diesel Exhaust Fluid (DEF) system, leading to warning lights and potential performance issues if not addressed. This can manifest as the vehicle entering a 'limp mode' if the DEF level is too low or if the system detects a fault. Another area of concern for some diesel owners is related to the turbocharger, with isolated reports of premature failure or performance degradation.
In terms of recalls, the 2020 Sierra 3500HD was subject to several. For instance, there were recalls related to the fuel pump potentially failing, the rear-view camera not functioning properly, and issues with the airbag control module. It's crucial for buyers to check the VIN against any outstanding recalls with the National Highway Traffic Safety Administration (NHTSA) or GMC directly.
Long-term reliability for heavy-duty trucks is often tied to their intended use. When used within their capabilities and maintained meticulously, Sierras can be very durable. However, vehicles subjected to constant, extreme towing or harsh working conditions may show wear and tear sooner. Owners who neglect routine maintenance, particularly on the diesel engine's fuel and exhaust systems, are more likely to encounter problems. While the gasoline V8 is generally considered more straightforward and less prone to complex emissions-related issues, it still requires proper maintenance. Some subjective complaints have also been noted regarding the infotainment system, with occasional reports of lag or freezing, although these are often software-related and can sometimes be resolved with updates.
In terms of recalls, the 2020 Sierra 3500HD was subject to several. For instance, there were recalls related to the fuel pump potentially failing, the rear-view camera not functioning properly, and issues with the airbag control module. It's crucial for buyers to check the VIN against any outstanding recalls with the National Highway Traffic Safety Administration (NHTSA) or GMC directly.
Long-term reliability for heavy-duty trucks is often tied to their intended use. When used within their capabilities and maintained meticulously, Sierras can be very durable. However, vehicles subjected to constant, extreme towing or harsh working conditions may show wear and tear sooner. Owners who neglect routine maintenance, particularly on the diesel engine's fuel and exhaust systems, are more likely to encounter problems. While the gasoline V8 is generally considered more straightforward and less prone to complex emissions-related issues, it still requires proper maintenance. Some subjective complaints have also been noted regarding the infotainment system, with occasional reports of lag or freezing, although these are often software-related and can sometimes be resolved with updates.
How long will the 2020 GMC Sierra 3500HD last?
With proper and consistent maintenance, the 2020 GMC Sierra 3500HD is engineered for longevity, often expected to serve reliably for 200,000 to 300,000 miles or more. Owner data and maintenance habits are critical factors. Those who perform regular oil changes, fluid flushes, and address any minor issues promptly will likely see their trucks last significantly longer. The Duramax diesel engine, in particular, is known for its durability when cared for, often surpassing the lifespan of gasoline counterparts. However, continuous heavy towing or neglect of the diesel exhaust fluid system can accelerate wear and potentially lead to costly repairs, impacting overall durability over time. The chassis and frame are built to withstand significant stress, contributing to long-term structural integrity.
What Technology & Safety Features are Included?
The 2020 GMC Sierra 3500HD offers a robust suite of technology and safety features, particularly in its higher trim levels, blending work capability with modern convenience. Standard on most trims is a touchscreen infotainment system, with screen sizes varying from 7 to 8 inches depending on the model. These systems typically include Apple CarPlay and Android Auto integration, allowing seamless smartphone connectivity for navigation, music, and calls. Bluetooth connectivity is also standard.
Driver-assistance and safety features are progressively integrated throughout the trim levels. While base models focus on essential safety, higher trims like the SLT, AT4, and Denali offer a more comprehensive package. Optional features include front and rear parking sensors, a rear-view camera (with available trailering cameras for enhanced visibility when towing), blind-spot monitoring, and rear cross-traffic alert. The Denali trim often includes an advanced trailering technology package that can feature systems like trailer length indicator and jack-knife alert.
Other notable tech includes available wireless charging, multiple USB ports, and an available premium Bose audio system for an enhanced listening experience. For drivers seeking more advanced aid, optional adaptive cruise control and forward collision alert are available on certain configurations.
Crash-test ratings for heavy-duty trucks like the Sierra 3500HD are not as extensively tested by organizations like the NHTSA or IIHS as their lighter-duty counterparts. However, the Sierra line generally performs well in the tests it undergoes, demonstrating structural integrity. The 2020 Sierra 3500HD is built with a high-strength steel frame and a reinforced cab, designed to provide excellent protection in the event of a collision. The availability of advanced airbags and electronic stability control further enhances its safety profile.
Driver-assistance and safety features are progressively integrated throughout the trim levels. While base models focus on essential safety, higher trims like the SLT, AT4, and Denali offer a more comprehensive package. Optional features include front and rear parking sensors, a rear-view camera (with available trailering cameras for enhanced visibility when towing), blind-spot monitoring, and rear cross-traffic alert. The Denali trim often includes an advanced trailering technology package that can feature systems like trailer length indicator and jack-knife alert.
Other notable tech includes available wireless charging, multiple USB ports, and an available premium Bose audio system for an enhanced listening experience. For drivers seeking more advanced aid, optional adaptive cruise control and forward collision alert are available on certain configurations.
Crash-test ratings for heavy-duty trucks like the Sierra 3500HD are not as extensively tested by organizations like the NHTSA or IIHS as their lighter-duty counterparts. However, the Sierra line generally performs well in the tests it undergoes, demonstrating structural integrity. The 2020 Sierra 3500HD is built with a high-strength steel frame and a reinforced cab, designed to provide excellent protection in the event of a collision. The availability of advanced airbags and electronic stability control further enhances its safety profile.
What Colors Options are Available?
Exterior Colors
Summit White
Cardinal Red Tintcoat
Onyx Black
Pacific Blue Metallic
Quicksilver Metallic
Cayenne Metallic
Hunter Metallic
Carbon Fiber Metallic
Deep Ocean Blue Metallic
Dark Slate Metallic
Interior Colors
Jet Black
Gideon/Very Dark Ash
Dark Walnut/Very Dark Ash
Graystone/Very Dark Ash
2020 GMC Sierra 3500HD Prices and Market Value
When new, the 2020 GMC Sierra 3500HD had an MSRP that typically started in the low $40,000s for base models and could climb well into the $80,000s for loaded Denali trims with the Duramax diesel engine. Currently, on the used market, prices for a 2020 Sierra 3500HD can range significantly, from around $45,000 to over $75,000, depending heavily on mileage, condition, trim level, and specific options. The Sierra 3500HD tends to hold its value relatively well, especially diesel models, due to its strong demand in work and towing applications. Factors affecting resale value include maintenance history, remaining warranty, overall condition, and market demand for heavy-duty trucks. Depreciation is generally moderate for this segment compared to smaller vehicles, especially for well-maintained diesel variants.
2020 GMC Sierra 3500HD Cost of Ownership
Owning a 2020 GMC Sierra 3500HD is generally considered costly, reflecting its heavy-duty nature. Insurance premiums will be higher than for smaller vehicles due to its size, cost, and towing capabilities. Fuel costs, especially with the gasoline engine or when towing heavily with the diesel, can be substantial, though the diesel is more efficient when not under heavy load. Maintenance is crucial; regular oil changes, filter replacements, and adherence to the diesel exhaust fluid schedule are essential for long-term health. Repairs on heavy-duty components and diesel engines can be expensive. While it offers immense capability, it is not an economical daily driver for most.
2020 GMC Sierra 3500HD Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
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City Mileage
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Highway Mileage
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2020 GMC Sierra 3500HD Insurance
Insurance for a 2020 GMC Sierra 3500HD is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2020 GMC Sierra 3500HD Compare to Other Truck?
The 2020 GMC Sierra 3500HD competes directly with other formidable heavy-duty trucks, primarily the Ford F-Series Super Duty (F-350) and the Ram 3500. In terms of performance, the Sierra 3500HD is highly competitive, especially with its Duramax diesel engine offering impressive torque for towing. The Ford F-350 often leads in maximum towing and payload figures, while the Ram 3500 is known for its available segment-exclusive coil-spring rear suspension (on some models) that can provide a more refined ride and excellent articulation for off-roading or heavy loads.
Regarding features, the Sierra 3500HD, especially in its AT4 and Denali trims, offers a luxurious and high-tech cabin. GMC often touts its MultiPro Tailgate as a unique and practical feature. The F-Series Super Duty and Ram 3500 also offer comparable high-end interiors and advanced technology, including sophisticated towing aids and infotainment systems. GMC's infotainment system is generally user-friendly, though some competitors might offer slightly more advanced or integrated tech.
Reliability perceptions can vary. While GMC's Duramax diesel is well-regarded, some owners have reported issues with emissions systems, a commonality across all modern diesel trucks. Ford's Power Stroke diesel and Ram's Cummins diesel also have their respective loyal followings and reported quirks. Historically, Ram trucks have sometimes faced more criticism for interior build quality or specific component issues compared to GMC or Ford, though the 2020 models were generally well-received.
In terms of price, all three trucks are in a similar, high bracket for their top trims. The Sierra 3500HD often strikes a good balance, offering premium features at a competitive price point, particularly when compared to the most loaded Denali versions. However, specific deals and configurations can significantly impact the final price.
Recommendations:
- For maximum towing capacity: The Ford F-350 might edge out the Sierra.
- For a potentially more refined ride and unique features: The Ram 3500 with its advanced suspension options is a strong contender.
- For a blend of luxury, capability, and value: The 2020 GMC Sierra 3500HD remains an excellent choice, especially in SLT, AT4, or Denali trims, offering a compelling package for demanding users.
Regarding features, the Sierra 3500HD, especially in its AT4 and Denali trims, offers a luxurious and high-tech cabin. GMC often touts its MultiPro Tailgate as a unique and practical feature. The F-Series Super Duty and Ram 3500 also offer comparable high-end interiors and advanced technology, including sophisticated towing aids and infotainment systems. GMC's infotainment system is generally user-friendly, though some competitors might offer slightly more advanced or integrated tech.
Reliability perceptions can vary. While GMC's Duramax diesel is well-regarded, some owners have reported issues with emissions systems, a commonality across all modern diesel trucks. Ford's Power Stroke diesel and Ram's Cummins diesel also have their respective loyal followings and reported quirks. Historically, Ram trucks have sometimes faced more criticism for interior build quality or specific component issues compared to GMC or Ford, though the 2020 models were generally well-received.
In terms of price, all three trucks are in a similar, high bracket for their top trims. The Sierra 3500HD often strikes a good balance, offering premium features at a competitive price point, particularly when compared to the most loaded Denali versions. However, specific deals and configurations can significantly impact the final price.
Recommendations:
- For maximum towing capacity: The Ford F-350 might edge out the Sierra.
- For a potentially more refined ride and unique features: The Ram 3500 with its advanced suspension options is a strong contender.
- For a blend of luxury, capability, and value: The 2020 GMC Sierra 3500HD remains an excellent choice, especially in SLT, AT4, or Denali trims, offering a compelling package for demanding users.
Final Verdict: Is the 2020 GMC Sierra 3500HD a Good Truck?
The 2020 GMC Sierra 3500HD is an ideal vehicle for those who require significant towing and hauling power for professional work, recreational activities like fifth-wheel RVing, or heavy-duty hauling needs. It is worth buying for individuals or businesses that can leverage its substantial capabilities. For those prioritizing luxury alongside power, the SLT, AT4, and especially the Denali trims deliver a refined experience. Buying used offers considerable value, as these trucks are built to last, but careful inspection, especially of the diesel powertrain and emissions systems, is advised. New buyers gain the latest warranty and potentially improved features, but at a premium cost. It's a practical purchase for those who truly need its heavy-duty prowess, rather than an everyday commuter vehicle.
Jovan
Jovan specializes in interpreting vehicle records and making sense of VIN data. With over 10 years of experience in the automotive data industry, his work ensures that every report is clear, accurate, and useful for car buyers.