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Used
2021 GMC Sierra 2500 SLE 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.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
Used
2021 GMC Sierra 2500 SLE
Vehicle information
Features
Reviews
Easy to work with salesman Mark Gibson.
Easy to work with salesman Mark Gibson. Friendly, casual atmosphere. Quick attention to details. Easy transition to new vehicle. Previous experience there positive in sales and service.
Beautiful truck
I love my 2021 GMC Denali 2500HD. I have gotten more complements on this truck than any other vehicle that I have owned. I get great highway fuel milage average 19-26mpg,which is great for a heavy duty truck!
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GMC Sierra 2500 prices by year
Model year | Prices from | Deals |
---|---|---|
2025 GMC Sierra 2500 SLE | $43,343 | 4 Good deals |
2024 GMC Sierra 2500 SLE | $39,990 | 11 Great deals |
2023 GMC Sierra 2500 SLE | $37,800 | 10 Great deals |
2022 GMC Sierra 2500 SLE | $29,999 | 19 Great deals |
2016 GMC Sierra 2500 SLE | $17,995 | 12 Good deals |
About the 2021 GMC Sierra 2500 SLE
Base shown (base trim).
- Seating
- 3
- 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 2500 SLE cost?
The 2021 GMC Sierra 2500 SLE price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 SLE is $42,144, with pricing starting at $30,496.
What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 SLE?
The 2021 GMC Sierra 2500 SLE compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 2500 SLE reliable?
The 2021 GMC Sierra 2500 has an average reliability rating of 4.1 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 2500 owners.
Is the 2021 GMC Sierra 2500 SLE a good truck?
Below are the Cars.com consumer ratings for the 2021 GMC Sierra 2500.
- Comfort 4.8
- Interior 4.6
- Performance 4.4
- Value 4.0
- Exterior 4.6
- Reliability 4.1
78% of drivers recommend this car
- Comfort 4.8
- Interior 4.6
- Performance 4.4
- Value 4.0
- Exterior 4.6
- Reliability 4.1
*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.
**Your Saved Vehicles list will be shared along with your contact information when you submit a vehicle request to a dealership. To opt out of this sharing, please view your options on Cars.com Privacy Notice.
GMC Sierra 2500 trims
-
GMC Sierra 2500 2021 Denali
10 Great Deals out of 200 listings starting at $41,965
-
GMC Sierra 2500 2021 AT4
1 Great Deal out of 95 listings starting at $37,396
-
GMC Sierra 2500 2021 SLT
4 Great Deals out of 31 listings starting at $41,510
-
GMC Sierra 2500 2021 Base
12 Great Deals out of 29 listings starting at $30,200
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