Used 2021 GMC Sierra 3500HD for Sale Nationwide
688 results
CarGurus Analysis:
2021 GMC Sierra 3500HD
With 691 currently listed for sale and an average price of $52,109.00, 29.7% of 2021 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars.
80.8% of 2021 Sierra 3500HD models on CarGurus are accident free.
CarGurus Analysis: 2021 GMC Sierra 3500HD
Summary
With 691 currently listed for sale and an average price of $52,109.00, 29.7% of 2021 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 GMC Sierra 3500HD 5 / 5 stars.
80.8% of 2021 Sierra 3500HD models on CarGurus are accident free.
Why it stands out
The 2021 GMC Sierra 3500HD stands out in the heavy-duty truck segment due to its combination of impressive towing and hauling capabilities coupled with luxurious features, particularly in its higher trim levels. As a refined alternative to its rivals, the Sierra 3500HD offers superior tech features, making it suitable for both work-related tasks and comfortable cruising. This model year continues the legacy of the GMC Sierra series, providing buyers with various configurations to meet their specific needs, from robust work-towing potential to plush luxury within the Denali trim. Additionally, the 2021 version benefits from fewer recalls than its competitors, which can contribute to better long-term value retention.
Other model years to consider
- Average price: $69,722.00
- Good/great deal percentage: 31.6%
- User rating: 5 / 5
- Total listings: 1,362
- Average price: $57,229.00
- Good/great deal percentage: 30.7%
- User rating: N/A
- Total listings: 1,291
- Average price: $77,444.00
- Good/great deal percentage: 30.9%
- User rating: 5 / 5
- Total listings: 1,238
This analysis is based on CarGurus' proprietary market data from June 8, 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 |
|---|---|
| Denali Crew Cab LB 4WD | $66,900 |
| Crew Cab LB 4WD | $44,800 |
| Double Cab LB 4WD | $40,200 |
| Crew Cab 4WD | $44,600 |
| SLE Crew Cab 4WD | $49,400 |
| AT4 Crew Cab 4WD | $60,300 |
| SLT Crew Cab 4WD | $57,400 |
| 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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