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*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
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Used
2021 GMC Sierra 3500 Denali trucks
for sale
near me
- Down Payment
- $0
- Net trade-in value
- $0
- Months
- 72
- APR
- 7.0%
- Sales tax
- 0.0%
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.






Used
2021 GMC Sierra 3500 Denali
Vehicle information
Features
Reviews
Leena has been the best!
Leena has been the best! Always professional and willing to walk me through details of auto's I’ve been interested in.
Truck is a Solid vehicle overall.
Has a really Big feel to it. I currently use mine to pull gooseneck trailer. I haven't had a load yet that I couldn't pull. The downsides to this truck is to me I feel it could get better fuel mileage. Also I had trouble with #4 injector...dealership replaced it. Now my AC doesn't work all the time. Although it sounds like it's blowing it isn't.
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GMC Sierra 3500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 3500 Denali | $74,685 | 8 Good deals |
2024 GMC Sierra 3500 Denali | $60,711 | 110 Good deals |
2023 GMC Sierra 3500 Denali | $49,999 | 13 Great deals |
2022 GMC Sierra 3500 Denali | $49,880 | 16 Great deals |
2020 GMC Sierra 3500 Denali | $36,995 | 9 Great deals |
2019 GMC Sierra 3500 Denali | $29,900 | 35 Good deals |
2018 GMC Sierra 3500 Denali | $26,999 | 25 Good deals |
2017 GMC Sierra 3500 Denali | $29,500 | 12 Good deals |
2016 GMC Sierra 3500 Denali | $24,250 | 12 Good deals |
About the 2021 GMC Sierra 3500 Denali
Base shown (base trim).
- Seating
- 2
- Door count
- 2
- Drivetrain
- Rear-wheel drive
- Combined MPG
- 0
- Transmission
- 6-Speed A/T
- Engine
- 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

How much does the 2021 GMC Sierra 3500 Denali cost?
The 2021 GMC Sierra 3500 Denali price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 3500 Denali is $60,451, with pricing starting at $46,599.
What are some similar vehicles and competitors of the 2021 GMC Sierra 3500 Denali?
The 2021 GMC Sierra 3500 Denali compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 3500 Denali reliable?
The 2021 GMC Sierra 3500 has an average reliability rating of 4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 3500 owners.
Is the 2021 GMC Sierra 3500 Denali a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 3500.
- Comfort 4.5
- Interior 4.5
- Performance 5.0
- Value 4.0
- Exterior 4.5
- Reliability 4.0
100% of drivers recommend this car
- Comfort 4.5
- Interior 4.5
- Performance 5.0
- Value 4.0
- Exterior 4.5
- Reliability 4.0
*Estimated payments are calculated by Cars.com and are for informational purposes only. We’ve estimated your taxes based on your provided ZIP code. These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale and financing of the vehicle. Other taxes may apply. They do not represent a financing offer or a guarantee of credit from the seller. Actual terms vary by lender.
GMC Sierra 3500 trims
-
GMC Sierra 3500 2021 Base
5 Great Deals out of 31 listings starting at $34,970
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