Used GMC Sierra 2500HD for Sale near Oneco, CT
CarGurus recommends the 2020 GMC Sierra 2500HD
## Summary
- With 1,443 currently listed for sale on CarGurus and an **average price of $48,924.00**, 33.5% of 2020 GMC Sierra 2500HD models for sale on CarGurus are rated as good or great deals.
- **Favorably reviewed:** Owners rated the 2020 GMC Sierra 2500HD 4.88 / 5 stars.
- **74.1% of 2020 Sierra 2500HD models on CarGurus are accident free**.
- The 2020 GMC Sierra 2500HD features a robust build with plenty of upscale options, a spacious interior, and advanced technology to improve driving comfort and connectivity.
## Why it stands out
The 2020 GMC Sierra 2500HD distinguishes itself in the heavy-duty truck segment with its combination of luxury, capability, and advanced technology. Designed as a professional-grade pickup, it offers buyers a premium experience compared to its competitors, focusing on comfort and high-end finishes. The Sierra 2500HD has a variety of upscale features, including a spacious cabin, advanced infotainment systems, and options for powerful V8 engines. With strong towing capabilities and a reputation for reliability, it appeals to both those who need a workhorse and those looking for an everyday vehicle. This model year also stands out due to its aesthetic appeal and thoughtful engineering, which provide a smooth ride whether in urban settings or off-road conditions.
## Other model years to consider
- **[2023 GMC Sierra 2500HD](https://www.cargurus.com/Cars/l-Used-2023-GMC-Sierra-2500HD-c32421)**
- Average price: $57,121.00
- Good/great deal percentage: 33.1%
- User rating: 4.33 / 5
- Total listings: 3,709
- **[2021 GMC Sierra 2500HD](https://www.cargurus.com/Cars/l-Used-2021-GMC-Sierra-2500HD-c30860)**
- Average price: $50,627.00
- Good/great deal percentage: 32.8%
- User rating: 4.69 / 5
- Total listings: 2,125
- **[2022 GMC Sierra 2500HD](https://www.cargurus.com/Cars/l-Used-2022-GMC-Sierra-2500HD-c31559)**
- Average price: $53,419.00
- Good/great deal percentage: 33.3%
- User rating: 4.86 / 5
- Total listings: 2,254
These recommendations are based on CarGurus' proprietary market data from February 23, 2026, CarGurus experts' opinions, and generative AI.
4.5 Overall rating
(272 reviews)Customers say
The GMC Sierra 2500HD is a favored choice among truck owners, known for its impressive power, towing capabilities, and comfortable ride. Drivers consistently appreciate its smooth handling and luxurious features that cater to both work and leisure needs. Owners often highlight its reliability and strong performance in challenging tasks like towing heavy loads. However, some owners do express concerns regarding fuel economy and pricing, noting that it can feel expensive compared to competitors, as well as mentioning quality issues in certain models. Overall, the Sierra 2500HD stands out for its performance and comfort, making it a solid option for those in need of a heavy-duty truck.
AI generated from the text of customer reviews.
What people say
I’m not a fan of black. This truck had a black exterior and interior. It’s not for me. GM should offer more color choices.
This truck is an SLT model, so its loaded with a lot of luxury features including power leather seats, premium sound (Bose), factory remote start, heated and cooled seats, heated steering wheel, etc.
The direct injection system and potential carbon buildup on the 6.6 gas V8 engines concern me - especially for long term use. GMC needs to work on developing a more reliable HD gas engine for longevity.
Good towing package/prep and good condition aesthetically. Little to no rust apparent.
Solid truck with plenty of power and all the bells and whistles. Rides smoothly, the Cadillac of trucks for sure.
GMC Sierra 2500HD FAQs
Is the GMC 2500 reliable?
Yes, the GMC Sierra 2500HD is known for its reliability, especially in certain model years. According to JD Power's rankings, the most reliable years for the Sierra 2500HD include 2020, 2018, 2016, 2014, 2012, 2011, and 2010. These models have earned high marks for their durability and dependability, making them solid choices if you're in the market for a heavy-duty pickup.
How many miles per gallon does a GMC 2500 diesel get?
The GMC Sierra 2500HD with the diesel engine delivers a fuel efficiency of around 17 mpg on the highway, based on tests of the Denali trim. While other diesel-powered competitors like the Silverado 2500 LTZ and Ram 2500 Tradesmen have achieved slightly better highway mileage at 19 mpg, the Sierra 2500HD still offers a respectable balance of power and fuel economy for a heavy-duty truck.
Is a GMC 2500 a good truck?
The 2024 GMC Sierra 2500 HD is indeed a good truck, known for its competence and power in the heavy-duty segment. It features a comfortable ride, a functional interior, and a potent turbocharged V8 engine. While it boasts a higher maximum tow rating than its predecessors, it still faces stiff competition from other brands. Nonetheless, it remains a solid choice for those needing a reliable and capable heavy-duty truck.
What is the MPG for a 2024 GMC Sierra 2500 HD diesel?
The 2024 GMC Sierra 2500 HD diesel has an average combined fuel economy of roughly 14 mpg, based on data from multiple vehicles, fuel-ups, and miles driven. This figure provides a realistic expectation of what owners can expect in terms of fuel efficiency, considering the truck's heavy-duty capabilities and performance demands.
How much does the GMC Sierra 2500HD cost in Oneco, CT?
The average GMC Sierra 2500HD costs about $55,655.17. The average price has decreased by -3.5% since last year. The 769 for sale near Oneco, CT on CarGurus, range from $5,347 to $130,169 in price.
Is the GMC Sierra 2500HD a good car?
CarGurus experts gave the 2024 GMC Sierra 2500HD an overall rating of 8/10 and GMC Sierra 2500HD owners have rated the vehicle a 4.4/5 stars on average. If a vehicle has both strong expert and owner reviews, you can feel confident in its quality. If either expert reviews, owner reviews, or both are spotty, you might want to do some research to figure out where the car falls short.
How many GMC Sierra 2500HD vehicles in Oneco, CT have no reported accidents or damage?
654 out of 769 for sale near Oneco, CT have no reported accidents or damage.
Is the GMC Sierra 2500HD safe?
CarGurus experts gave the 2024 GMC Sierra 2500HD a safety rating of 9/10.
What fuel types are available?
Diesel, Biodiesel, Flex Fuel Vehicle, Gasoline engines are available.
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