Used 2021 GMC Sierra 3500HD for Sale near Ontario
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CarGurus Analysis: 2021 GMC Sierra 3500HD
Summary
With 94 currently listed for sale and an average price of $68,116.00 CAD, 26.6% of 2021 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favourably reviewed: Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars.
100.0% of 2021 Sierra 3500HD models on CarGurus are accident free.
Why it stands out
The 2021 GMC Sierra 3500HD is a prime choice for buyers seeking a robust heavy-duty pickup truck that combines power with refinement. This fifth-generation truck offers impressive towing and hauling capabilities, with the ability to tow up to 16,100 kilograms (35,500 pounds) and haul up to 3,375 kilograms (7,442 pounds) of cargo, making it suitable for both work and play. The 2021 model benefits from a strong selection of engine options, including a powerful 6.6-litre Duramax turbodiesel V8 that produces 445 horsepower and 910 lb-ft of torque.
Shoppers can choose from various trim levels, which allow for a balance of work truck sensibilities and luxury features, especially in higher trims like the Denali, which boasts premium leather upholstery and advanced technology. The truck also comes with a range of smart tech features designed for towing and off-roading, making it versatile for different users' needs. That being said, while the truck's capabilities are impressive, the higher trim levels can be quite expensive, which might deter some buyers.
Other model years to consider
- Average price: $83,161.00 CAD
- Good/great deal percentage: 30.6%
- User rating: 5 / 5
- Total listings: 147
- Average price: $77,354.00 CAD
- Good/great deal percentage: 26.5%
- User rating: N/A
- Total listings: 147
- Average price: $93,593.00 CAD
- Good/great deal percentage: 31.1%
- User rating: 5 / 5
- Total listings: 119
This analysis is based on CarGurus' proprietary market data from May 25, 2026, CarGurus experts' opinions, and generative AI.
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5.0 Overall rating
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John P
Reviewed a 2021 GMC Sierra 3500HD on Nov 3, 2023
This truck is incredible and very comfortable for even daily use.
Anonymous
Reviewed a 2021 GMC Sierra 3500HD on Jun 5, 2021
This truck was what was needed to pull our 42’ 5th wheel safely. It has the comfort of a nice ride and the power to pull and the and the strength to haul what I need.
Joe H
Reviewed a 2021 GMC Sierra 3500HD on Feb 8, 2021
The Black Diamond Edition is one of the most popular trucks out there. There has been only 2 in our area and both sold before they arrived at the lot.
2021 GMC Sierra 3500HD Trims
| Trim type | MSRP |
|---|---|
| SLE Double Cab LB 4WD | $47,800 |
| SLE Crew Cab 4WD | $49,400 |
| AT4 Crew Cab 4WD | $60,300 |
| Denali Crew Cab 4WD | $66,700 |
2021 GMC Sierra 3500HD Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2021 GMC Sierra 3500HD prices has changed over time.
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