The 2021 GMC Sierra is a full-size pickup truck, part of a lineage dating back decades. Available in Regular Cab, Double Cab, and Crew Cab body styles, it competes in a segment with established rivals. Key trims for 2021 included the SLE, Elevation, SLT, AT4, and the range-topping Denali. Pricing typically ranged from around $35,000 to over $60,000. Its popularity stems from its professional-grade image, robust capability, and a focus on upscale interiors, particularly in higher trims.
The Good
The 2021 Sierra offers strong engine options and impressive towing capacities, appealing to practical needs. Its refined interior and premium features, especially on higher trims, provide emotional appeal and comfort. While not the most fuel-efficient, its overall value proposition, particularly for those seeking capability and a touch of luxury, is a significant advantage.
The Bad
Owners have reported issues with the infotainment system occasionally freezing or becoming unresponsive. Some also note a less engaging driving experience compared to some competitors, and fuel economy can be a concern with the larger engine options. The complex multi-function tailgate, while innovative, has also seen some reliability complaints.
2021 GMC Sierra: Quick Overview
- Engine Options: The 2021 GMC Sierra offered a diverse range of powertrains:
- 2.7L Turbocharged 4-cylinder: 310 horsepower, 348 lb-ft of torque
- 5.3L V8: 355 horsepower, 383 lb-ft of torque
- 6.2L V8: 420 horsepower, 460 lb-ft of torque (AT4 and Denali trims primarily)
- 3.0L Duramax Turbo-Diesel: 277 horsepower, 460 lb-ft of torque
- 3.0L Inline-6 Turbocharged Gas Engine (new for 2021): 325 horsepower, 380 lb-ft of torque (late availability)
- Horsepower: Ranging from 310 hp to 420 hp.
- Fuel Economy (Estimated MPG Combined): Varies significantly by engine and drivetrain. The 2.7L Turbo might achieve around 20 MPG combined, while the 5.3L V8 could be closer to 17 MPG. The Duramax diesel offers the best economy, potentially in the mid-20s MPG combined.
- 0-60 Times: Generally in the 6-7 second range for V8 and turbo-four engines, with the diesel potentially being a bit slower but offering strong torque.
- Towing Capacity: Maximum towing capacity can reach up to 12,200 pounds with the 5.3L V8 and max trailering package, or 9,300 pounds with the 2.7L Turbo. The diesel and 6.2L V8 also offer substantial towing capabilities, typically over 9,000 pounds.
- Trim-Level Features:
- SLE: 17-inch wheels, cloth upholstery, 8-inch touchscreen infotainment with Apple CarPlay/Android Auto, LED exterior lighting.
- Elevation: Adds body-colored grille surround, 20-inch aluminum wheels, dual-zone climate control.
- SLT: More premium features like leather upholstery, heated/ventilated front seats, power-folding trailering mirrors, and additional driver-assistance features.
- AT4: Off-road focused with 2-inch factory lift, skid plates, Rancho monotube suspension, all-terrain tires, unique interior styling, and 4WD standard.
- Denali: The luxury trim, featuring premium leather, advanced safety features, unique exterior accents, Bose premium audio, and enhanced comfort amenities.
2021 GMC Sierra Specifications
Vehicle Information
| Year | 2021 |
| Make | GMC |
| Model | Sierra |
| Trim | - |
| Style | - |
| Type | Truck |
| Category | Standard Pickup Truck |
Manufacturing Details
| Made In | Mexico |
| Manufacturing City | SILAO |
Dimensions
| Doors | 4-Door |
| Curb Weight | - |
| Gross Vehicle Weight Rating | 8000 pounds |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | L84 - DI, ALUM, GEN 5, VAR 2 |
| Engine Size | 5.3L |
| Engine Cylinders | 8 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| 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 2021 GMC Sierra Have?
For the 2021 GMC Sierra, several issues have been noted by owners. A recurring concern involves the infotainment system, with reports of the touchscreen freezing, lagging, or becoming completely unresponsive. This often requires a system reset or, in some cases, a dealership visit. Another area of concern for some owners is the complexity and occasional unreliability of the MultiPro Tailgate. While innovative, some users have experienced issues with its deployment, retraction, or electronic components malfunctioning.
Powertrain issues, though not widespread, have been reported. Some owners of the 2.7L Turbo engine have experienced occasional rough idling or hesitations. For those with the 5.3L V8, reports of exhaust manifold leaks have surfaced, although this is a less common issue for the 2021 model year compared to some previous generations. The Duramax diesel, while generally well-received for its efficiency, has seen some isolated reports of DEF (Diesel Exhaust Fluid) system issues or the need for regeneration cycles.
In terms of recalls, the 2021 Sierra has seen a few. One significant recall addressed potential issues with the transmission cooler lines, which could leak and increase the risk of fire. Another recall concerned the brake system, specifically related to the electronic brake booster. It is always advisable for owners to check the National Highway Traffic Safety Administration (NHTSA) website for the most up-to-date recall information pertaining to their specific vehicle.
Long-term reliability is generally considered good for the Sierra, especially with proper maintenance. However, the aforementioned electronic glitches and tailgate issues are points to watch. For 2021 models, the focus remains on these specific electronic and mechanical components rather than widespread engine or transmission failures. Owners who maintain their vehicles according to the manufacturer's schedule are likely to experience fewer significant problems.
Powertrain issues, though not widespread, have been reported. Some owners of the 2.7L Turbo engine have experienced occasional rough idling or hesitations. For those with the 5.3L V8, reports of exhaust manifold leaks have surfaced, although this is a less common issue for the 2021 model year compared to some previous generations. The Duramax diesel, while generally well-received for its efficiency, has seen some isolated reports of DEF (Diesel Exhaust Fluid) system issues or the need for regeneration cycles.
In terms of recalls, the 2021 Sierra has seen a few. One significant recall addressed potential issues with the transmission cooler lines, which could leak and increase the risk of fire. Another recall concerned the brake system, specifically related to the electronic brake booster. It is always advisable for owners to check the National Highway Traffic Safety Administration (NHTSA) website for the most up-to-date recall information pertaining to their specific vehicle.
Long-term reliability is generally considered good for the Sierra, especially with proper maintenance. However, the aforementioned electronic glitches and tailgate issues are points to watch. For 2021 models, the focus remains on these specific electronic and mechanical components rather than widespread engine or transmission failures. Owners who maintain their vehicles according to the manufacturer's schedule are likely to experience fewer significant problems.
How long will the 2021 GMC Sierra last?
Based on owner data and typical maintenance habits, the 2021 GMC Sierra is generally expected to provide reliable service for 150,000 to 200,000 miles or more. Trucks with diligent adherence to the recommended maintenance schedule, including regular oil changes, fluid flushes, and inspections, will naturally last longer. Long-term durability is strong for the core mechanical components, especially the V8 engines and robust chassis. However, like many modern vehicles, the electrical systems and the innovative MultiPro Tailgate can be potential weak points over extended use, potentially requiring repairs sooner than the mechanical parts. Routine check-ups and addressing minor electronic glitches promptly can contribute significantly to its longevity.
What Technology & Safety Features are Included?
The 2021 GMC Sierra is well-equipped with modern technology, entertainment, and safety features, especially in its higher trims. Standard on most models is an 8-inch diagonal GMC Infotainment System with touch screen, featuring Apple CarPlay and Android Auto integration, allowing seamless smartphone connectivity. Bluetooth, a 4G LTE Wi-Fi hotspot, and USB ports are also standard, enhancing convenience. Higher trims, like the Denali, offer an upgraded Bose premium audio system.
Driver-assistance and safety features are becoming increasingly prevalent. Standard features often include a rearview camera and StabiliTrak stability control with traction control. Optional and more advanced features, available on certain trims or as part of packages, include:
Crash-test ratings for the 2021 GMC Sierra from the National Highway Traffic Safety Administration (NHTSA) typically show strong performance in key areas. It often receives a 4-star overall safety rating, with good scores in frontal and side crash tests. However, specific results can vary slightly depending on the configuration (e.g., cab type). The Insurance Institute for Highway Safety (IIHS) often gives it good ratings in its crashworthiness tests, and its available front crash prevention systems have also earned top marks, further contributing to its safety profile.
Driver-assistance and safety features are becoming increasingly prevalent. Standard features often include a rearview camera and StabiliTrak stability control with traction control. Optional and more advanced features, available on certain trims or as part of packages, include:
- Lane Departure Warning
- Lane Keep Assist
- Forward Collision Alert
- Automatic Emergency Braking
- Front Pedestrian Braking
- Blind Zone Alert with Lane Change Alert
- Rear Cross Traffic Alert
- Adaptive Cruise Control
- Surround Vision camera system
Crash-test ratings for the 2021 GMC Sierra from the National Highway Traffic Safety Administration (NHTSA) typically show strong performance in key areas. It often receives a 4-star overall safety rating, with good scores in frontal and side crash tests. However, specific results can vary slightly depending on the configuration (e.g., cab type). The Insurance Institute for Highway Safety (IIHS) often gives it good ratings in its crashworthiness tests, and its available front crash prevention systems have also earned top marks, further contributing to its safety profile.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
2021 GMC Sierra Prices and Market Value
When new, the 2021 GMC Sierra had an MSRP that typically started in the mid-$30,000 range for base models and could climb well over $60,000 for fully-loaded Denali trims. Current used market prices for a 2021 Sierra vary widely based on trim level, mileage, condition, and geographic location, but you can generally find them ranging from the high $20,000s to the $50,000s. GMC Sierras tend to hold their value reasonably well, experiencing moderate depreciation in the first few years. Factors influencing resale value include its strong reputation for capability, the availability of desirable trims like the Denali and AT4, robust engine options, and overall market demand for pickup trucks. Higher mileage or poorly maintained examples will depreciate faster.
2021 GMC Sierra Cost of Ownership
Ownership costs for the 2021 GMC Sierra can be moderate to high, depending on engine choice and driving habits. Fuel costs will be higher for V8 engines, with the diesel offering better economy. Insurance premiums are generally in line with other full-size trucks, influenced by the specific trim and your driving record. Routine maintenance, including oil changes and tire rotations, is standard for the class. However, repairs for complex systems like the MultiPro Tailgate or advanced electronics can be more expensive. Overall, while not the most economical, the Sierra offers good value for its capability and features, with costs generally comparable to its main competitors.
2021 GMC Sierra Fuel Efficiency
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2021 GMC Sierra Safety Rating
NHTSA
2021 GMC Sierra Insurance
Insurance for a 2021 GMC Sierra is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2021 GMC Sierra Compare to Other Truck?
The 2021 GMC Sierra competes fiercely with rivals like the Chevrolet Silverado 1500 (its corporate cousin), Ford F-150, Ram 1500, and Toyota Tundra. In terms of performance, the Sierra offers potent engine options, especially the 6.2L V8 and the efficient Duramax diesel, rivaling the F-150's EcoBoost engines and Ram's Hemi V8. Its towing and payload capacities are competitive across the board. When it comes to features, the Sierra shines with its premium Denali trim, offering a luxurious interior that often surpasses the F-150 and Silverado in refinement, and its innovative MultiPro Tailgate is unique. However, the Ram 1500's interior design and ride quality are often lauded as superior by reviewers.
Reliability is a mixed bag. While the core mechanicals are generally robust, the Sierra, like its Silverado sibling, has faced more reports of electronic glitches and tailgate issues than some competitors like the Toyota Tundra, which historically boasts exceptional reliability. The Ford F-150 also offers a strong reliability record, particularly with its EcoBoost engines. In terms of price, the Sierra often sits slightly above its Chevrolet counterpart, reflecting its more premium positioning. It can be priced competitively with well-equipped F-150s and Ram 1500s, but the Denali trim can quickly escalate the cost.
Recommendations:
Reliability is a mixed bag. While the core mechanicals are generally robust, the Sierra, like its Silverado sibling, has faced more reports of electronic glitches and tailgate issues than some competitors like the Toyota Tundra, which historically boasts exceptional reliability. The Ford F-150 also offers a strong reliability record, particularly with its EcoBoost engines. In terms of price, the Sierra often sits slightly above its Chevrolet counterpart, reflecting its more premium positioning. It can be priced competitively with well-equipped F-150s and Ram 1500s, but the Denali trim can quickly escalate the cost.
Recommendations:
- Similar Alternative: The 2021 Chevrolet Silverado 1500 offers very similar mechanicals and performance at a slightly lower price point, though with a less upscale interior.
- For a More Refined Interior and Ride: The 2021 Ram 1500 is an excellent choice, offering a more sophisticated cabin and a smoother ride, though some of its innovative features might not match the Sierra's.
- For Proven Reliability: The 2021 Toyota Tundra is a stalwart for durability and longevity, though it generally offers less advanced technology and efficiency compared to the Sierra.
- For Engine Innovation: The 2021 Ford F-150 offers a wide array of excellent EcoBoost engine options and a robust, aluminum-intensive design, making it a strong contender across the board.
Final Verdict: Is the 2021 GMC Sierra a Good Truck?
The 2021 GMC Sierra is an ideal choice for buyers who prioritize capability, a strong professional image, and a touch of luxury in their pickup truck. It's well-suited for those who need to tow or haul significant loads but also appreciate a comfortable and refined cabin, especially in SLT, AT4, and Denali trims.
Whether it's worth buying depends on your priorities and budget. Used models offer a good value proposition, especially if you can find one with lower mileage and a well-maintained history. The higher trims like the Denali provide a near-luxury experience, while the AT4 appeals to off-road enthusiasts.
It's worth buying if you can overlook the potential for minor electronic glitches and tailgate issues, which are not universal but have been reported. If absolute, bulletproof reliability is your only concern, competitors like the Toyota Tundra might be a safer bet. However, for a well-rounded package of power, features, and a premium feel, the 2021 Sierra remains a compelling option, particularly if sourced from a reputable seller with a transparent maintenance record.
Whether it's worth buying depends on your priorities and budget. Used models offer a good value proposition, especially if you can find one with lower mileage and a well-maintained history. The higher trims like the Denali provide a near-luxury experience, while the AT4 appeals to off-road enthusiasts.
It's worth buying if you can overlook the potential for minor electronic glitches and tailgate issues, which are not universal but have been reported. If absolute, bulletproof reliability is your only concern, competitors like the Toyota Tundra might be a safer bet. However, for a well-rounded package of power, features, and a premium feel, the 2021 Sierra remains a compelling option, particularly if sourced from a reputable seller with a transparent maintenance record.
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.