The 2021 GMC Sierra 3500HD is a heavy-duty pickup truck designed for demanding work. Part of the Sierra's fourth generation (2020-present), it's available as a regular cab, double cab, or crew cab. Key trims include the base Sierra, SLE, SLT, AT4, and Denali. Pricing ranges from approximately $37,000 to over $70,000, depending on configuration and options. Its distinctive styling, powerful engine options, and luxurious Denali trim contribute to its popularity.
The Good
The 2021 GMC Sierra 3500HD boasts impressive performance with its robust engine options and exceptional towing capacity, appealing to practical buyers. Its comfortable cabin, especially in higher trims like Denali, and bold design offer emotional satisfaction. While not the most fuel-efficient, its dependability and reputation enhance its overall value.
The Bad
The 2021 GMC Sierra 3500HD can suffer from a stiff ride, particularly when unladen. Some owners have reported issues with the infotainment system and certain electronic components. Fuel economy, as expected for a heavy-duty truck, is not a strong point. Potential buyers should also be aware of the vehicle's large size, which can make maneuvering in tight spaces challenging.
2021 GMC Sierra 3500HD: Quick Overview
- Engine Options:
- 6.6L V8 Gas: Produces 401 horsepower and 464 lb-ft of torque.
- 6.6L Duramax Turbo-Diesel V8: Produces 445 horsepower and 910 lb-ft of torque.
- Horsepower:
- Gas: 401 hp
- Diesel: 445 hp
- Fuel Economy:
- Fuel economy is not officially rated for heavy-duty trucks by the EPA. Expect significantly lower MPG than light-duty trucks. The gas engine provides around 12-14 mpg combined, and the diesel provides about 14-16 mpg combined, depending on driving conditions and load.
- 0-60 Times:
- 0-60 times are not typically published for heavy-duty trucks. Expect the diesel to be quicker due to its high torque output. Estimates are in the 7-8 second range for the diesel.
- Towing Capacity:
- Maximum towing capacity with the diesel engine and proper configuration is up to 36,000 lbs. The gas engine offers slightly less towing capacity.
- Trim-Level Features:
- Sierra: Basic work truck with vinyl seating, manual features, and basic infotainment.
- SLE: Adds cloth seating, upgraded infotainment system, and more convenience features.
- SLT: Leather seating, chrome exterior trim, dual-zone climate control, and more advanced technology.
- AT4: Off-road focused with a lifted suspension, skid plates, and unique styling.
- Denali: Premium luxury trim with exclusive leather, wood trim, advanced technology, and enhanced comfort features. Includes features like heated and ventilated seats, premium audio systems, and advanced safety features.
2021 GMC Sierra 3500HD Specifications
Vehicle Information
| Year | 2021 |
| Make | GMC |
| Model | Sierra 3500HD |
| Trim | - |
| Style | Crew Cab Rear-Wheel Drive |
| Type | Pickup Truck |
| Category | Standard Pickup Truck |
Manufacturing Details
| Made In | United States |
| Manufacturing City | FLINT |
Dimensions
| Doors | 4-Door |
| Curb Weight | 3204.17 kg |
| Gross Vehicle Weight Rating | 6350.29 kg |
| Overall Height | 205.49 cm |
| Overall Length | 675.89 cm |
| Overall Width | 208.03 cm |
| Wheelbase Length | 436.88 cm |
| Standard Seating | 6 |
Engine & Performance
| Engine | 6.6-L V-8 OHV 16 Diesel |
| Engine Size | 6.6L |
| Engine Cylinders | 8 |
| Transmission | 6-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 6-Speed |
| Drivetrain | Four-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Recirculating |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $46,095 USD |
| Invoice Price | $43,692 USD |
| Delivery Charges | $1,595 USD |
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What Problems Does the 2021 GMC Sierra 3500HD Have?
The 2021 GMC Sierra 3500HD, like many modern vehicles, has experienced its share of reported problems. Some owners have reported issues with the infotainment system, including glitches, slow response times, and connectivity problems with Apple CarPlay and Android Auto. Other reported problems relate to the diesel exhaust fluid (DEF) system, which can sometimes trigger warning lights or require servicing. Some owners have also reported issues with the automatic transmission, particularly rough shifting or delayed engagement.
Recalls for the 2021 model year have addressed issues such as potential fuel leaks or brake system malfunctions. It's essential to check the NHTSA (National Highway Traffic Safety Administration) website for the latest recall information and ensure any outstanding recalls have been addressed.
Long-term reliability concerns often revolve around the longevity of the Duramax diesel engine's components, such as the fuel injectors and high-pressure fuel pump. Proper maintenance, including regular oil changes and fuel filter replacements, is crucial for extending the life of these components. Additionally, the complexity of modern diesel engines means that repairs can be expensive. The 2020 model year, being the first year of the generation, experienced a higher frequency of reported issues compared to the 2021 model, suggesting some improvements in the later year. Overall, maintaining a rigorous maintenance schedule is paramount for long-term reliability.
Recalls for the 2021 model year have addressed issues such as potential fuel leaks or brake system malfunctions. It's essential to check the NHTSA (National Highway Traffic Safety Administration) website for the latest recall information and ensure any outstanding recalls have been addressed.
Long-term reliability concerns often revolve around the longevity of the Duramax diesel engine's components, such as the fuel injectors and high-pressure fuel pump. Proper maintenance, including regular oil changes and fuel filter replacements, is crucial for extending the life of these components. Additionally, the complexity of modern diesel engines means that repairs can be expensive. The 2020 model year, being the first year of the generation, experienced a higher frequency of reported issues compared to the 2021 model, suggesting some improvements in the later year. Overall, maintaining a rigorous maintenance schedule is paramount for long-term reliability.
How long will the 2021 GMC Sierra 3500HD last?
With proper maintenance, a 2021 GMC Sierra 3500HD can easily achieve 200,000 to 300,000 miles or more. Years of service can extend beyond 10-15 years depending on usage. Long-term durability largely depends on adherence to the recommended maintenance schedule, especially for diesel models. Potential weaknesses over time include wear and tear on suspension components, drivetrain parts, and potential rust in regions with harsh winters. The diesel engine's emissions control systems also require ongoing attention and can be costly to repair as they age. Regular fluid changes and inspections are critical to maximize lifespan.
What Technology & Safety Features are Included?
The 2021 GMC Sierra 3500HD offers a range of built-in tech and safety features. The infotainment system typically includes an 8-inch touchscreen display with Apple CarPlay and Android Auto compatibility. Higher trims may feature navigation and a premium Bose sound system.
Driver-assistance features include standard features like a rearview camera, and available options such as forward collision alert, lane departure warning, automatic emergency braking, and blind-spot monitoring. Adaptive cruise control is also often available on higher trims.
Safety features encompass standard airbags, electronic stability control, and traction control. Optional safety features include a surround-view camera system, which provides a bird's-eye view of the vehicle, and a bed-view camera, which helps with hitching a trailer.
Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) should be consulted for specific safety performance information. Note that heavy-duty trucks are not always subjected to the same comprehensive testing as light-duty vehicles. However, the available safety features contribute to a safer driving experience.
Optional features extend to things like a head-up display, which projects important information onto the windshield, and a digital rearview mirror, which uses a camera to provide an unobstructed view behind the vehicle. These technologies enhance both convenience and safety.
Driver-assistance features include standard features like a rearview camera, and available options such as forward collision alert, lane departure warning, automatic emergency braking, and blind-spot monitoring. Adaptive cruise control is also often available on higher trims.
Safety features encompass standard airbags, electronic stability control, and traction control. Optional safety features include a surround-view camera system, which provides a bird's-eye view of the vehicle, and a bed-view camera, which helps with hitching a trailer.
Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) should be consulted for specific safety performance information. Note that heavy-duty trucks are not always subjected to the same comprehensive testing as light-duty vehicles. However, the available safety features contribute to a safer driving experience.
Optional features extend to things like a head-up display, which projects important information onto the windshield, and a digital rearview mirror, which uses a camera to provide an unobstructed view behind the vehicle. These technologies enhance both convenience and safety.
What Colors Options are Available?
Exterior Colors
Summit White
Onyx Black
Cardinal Red
Pacific Blue Metallic
Brownstone Metallic
Quicksilver Metallic
Hunter Metallic
Dark Sky Metallic
White Frost Tricoat
Interior Colors
Jet Black
Dark Walnut/Slate
Cocoa/Dune
Forge Brown
2021 GMC Sierra 3500HD Prices and Market Value
When new, the 2021 GMC Sierra 3500HD ranged from around $37,000 for a base model to over $70,000 for a fully loaded Denali. Current used market prices vary greatly based on condition, mileage, and trim level. Expect prices from the low $30,000s to the high $60,000s. Depreciation is relatively slow compared to some vehicles, especially for diesel models in good condition. Factors affecting resale value include mileage, condition, trim level (Denali models hold value well), engine type (diesel generally commands a premium), and overall market demand for heavy-duty trucks.
2021 GMC Sierra 3500HD Cost of Ownership
The 2021 GMC Sierra 3500HD is generally costly to own. Insurance premiums are higher than average due to its size and potential repair costs. Fuel costs are substantial, especially with the gas engine. Maintenance, including oil changes and tire replacements, is more expensive than for smaller vehicles. Repairs, particularly for the diesel engine and its emissions system, can be significant. Long-term ownership requires a dedicated budget for upkeep. It is not an economical vehicle.
2021 GMC Sierra 3500HD Fuel Efficiency
Fuel Type
Diesel
Fuel Capacity
136.27 liters
City Mileage
-
Highway Mileage
-
2021 GMC Sierra 3500HD Warranty
Basic
Original warranty
36 months / 36,000 miles
Estimated remaining
Expired
Powertrain
Original warranty
60 months / 60,000 miles
Estimated remaining
12 months / 60,000 miles
Rust
Original warranty
72 months / 100,000 miles
Estimated remaining
24 months / 100,000 miles
2021 GMC Sierra 3500HD Insurance
Insurance for a 2021 GMC Sierra 3500HD is moderately priced, reflecting its status as a Pickup Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2021 GMC Sierra 3500HD Compare to Other Pickup Truck?
The 2021 GMC Sierra 3500HD competes with the Ford F-350, Ram 3500, and Chevrolet Silverado 3500HD (its corporate sibling). Performance is comparable across the board, with each offering powerful gas and diesel engine options. In terms of features, the Sierra 3500HD offers a luxurious Denali trim that rivals the top trims of its competitors. Reliability is generally similar, though individual owner experiences can vary.
Price-wise, the Sierra 3500HD is often positioned competitively, though the Denali trim can be more expensive than some rivals' top-tier offerings. The Ram 3500 often stands out for its ride quality and interior design, while the Ford F-350 boasts impressive towing and payload capabilities.
The Chevrolet Silverado 3500HD is very similar to the Sierra, sharing many components and features. The choice between them often comes down to styling preferences and available deals. The Ram 3500 is a worthy alternative if ride comfort is a priority. The Ford F-350 might be preferred for those who need maximum towing capacity. Ultimately, test driving each and comparing specific configurations is recommended.
Price-wise, the Sierra 3500HD is often positioned competitively, though the Denali trim can be more expensive than some rivals' top-tier offerings. The Ram 3500 often stands out for its ride quality and interior design, while the Ford F-350 boasts impressive towing and payload capabilities.
The Chevrolet Silverado 3500HD is very similar to the Sierra, sharing many components and features. The choice between them often comes down to styling preferences and available deals. The Ram 3500 is a worthy alternative if ride comfort is a priority. The Ford F-350 might be preferred for those who need maximum towing capacity. Ultimately, test driving each and comparing specific configurations is recommended.
Ranks #310 Truck
| 1 | 2023 Toyota Tundra | (5.0★) |
| 2 | 2022 Honda Ridgeline | (5.0★) |
| 3 | 2023 Ford E-Transit Chassis | (0.0★) |
| 4 | 2020 Mercedes-Benz Sprinter Cab Chassis | (0.0★) |
| 5 | 2024 Chevrolet Silverado 3500HD | (0.0★) |
| 6 | 2023 Hyundai Santa Cruz | (5.0★) |
| 7 | 2023 Nissan Frontier | (5.0★) |
| 8 | 2024 GMC Sierra 2500HD | (0.0★) |
| 9 | 2023 Ram 4500 | (0.0★) |
| 10 | 2022 Jeep Gladiator | (5.0★) |
| 11 | 2012 Suzuki Equator | (0.0★) |
| 12 | 2009 Mitsubishi Raider | (5.0★) |
| 310 | 2021 GMC Sierra 3500HD | (0.0★) |
Final Verdict: Is the 2021 GMC Sierra 3500HD a Good Pickup Truck?
The 2021 GMC Sierra 3500HD is ideal for individuals and businesses requiring a heavy-duty truck for towing and hauling. It's worth buying if you need its capabilities and appreciate its styling and available luxury features. A used model can be a good value, especially if well-maintained and with lower mileage. The Denali trim is desirable for those seeking a premium experience. Consider the diesel engine for heavy towing needs, but be prepared for higher maintenance costs. Ensure any potential purchase has a clean vehicle history and has undergone a thorough inspection.
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.