Used 2020 GMC Sierra 3500HD for Sale near Alabama
Shop with transparent pricing.
Only show listings that include dealer fees- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Black (Ebony Twilight Metallic)
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 118,892
- Stock #:
- P15149
- VIN:
- 1GT49WEYXMF123378
Sponsored Listing
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
118,892 mi
$49,499
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Fuel type:
- Biodiesel
- Transmission:
- 6-Speed Automatic Overdrive
- Mileage:
- 174,316
- Stock #:
- 8852
- VIN:
- 1GT42WEY8KF138852
Sponsored Listing
2019 GMC Sierra 3500HD
Denali Crew Cab LB DRW 4WD
174,316 mi
$39,099
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Onyx Black
- Fuel type:
- Biodiesel
- Interior color:
- Dark Walnut / Very Dark Ash Leather
- Transmission:
- Automatic
- Mileage:
- 126,283
- Stock #:
- 133063
- VIN:
- 1GT49WEY2MF133063
2021 GMC Sierra 3500HD
Denali Crew Cab LB DRW 4WD
126,283 mi
$52,924
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior color:
- [GAZ] Summit White
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 21,400
- Stock #:
- 26244
- VIN:
- 1GT49SE72MF237360
![[GAZ] Summit White 2021 GMC Sierra 3500HD Pickup Truck Four-Wheel Drive Automatic](https://static.cargurus.com/images/forsale/2026/06/16/16/56/2021_gmc_sierra_3500hd-pic-5017205576063805583-1024x768.jpeg?io=true&width=640&height=480&fit=bounds&format=jpg&auto=webp)
2021 GMC Sierra 3500HD
SLE Crew Cab 4WD
21,400 mi
$42,500
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Summit White
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 129,976
- Stock #:
- 134628
- VIN:
- 1GT49WEY7MF134628
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
129,976 mi
$48,799
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- White Frost Tricoat
- Fuel type:
- Biodiesel
- Interior color:
- Gray (Dark Walnut/Dark Ash Grey)
- Transmission:
- Automatic
- Mileage:
- 96,687
- Stock #:
- C260177Y
- VIN:
- 1GT49WEY8LF346663
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
96,687 mi
$47,891
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Black (Ebony Twilight Metallic)
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 118,892
- Stock #:
- P15149
- VIN:
- 1GT49WEYXMF123378
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
118,892 mi
$49,499
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Fuel type:
- Biodiesel
- Transmission:
- 6-Speed Automatic Overdrive
- Mileage:
- 174,316
- Stock #:
- 8852
- VIN:
- 1GT42WEY8KF138852
2019 GMC Sierra 3500HD
Denali Crew Cab LB DRW 4WD
174,316 mi
$39,099
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Fuel type:
- Biodiesel
- Transmission:
- Automatic
- Mileage:
- 103,513
- Stock #:
- 250025
- VIN:
- 1GT49WEY0LF250025
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
103,513 mi
$50,670
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Black (Ebony Twilight Metallic)
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black with Kalah
- Transmission:
- Automatic
- Mileage:
- 32,335
- Stock #:
- b261942
- VIN:
- 1GT49VEY9MF261942
2021 GMC Sierra 3500HD
AT4 Crew Cab 4WD
32,335 mi
$57,946
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Exterior color:
- Black
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 49,149
- Stock #:
- 28631233
- VIN:
- 1GT49WEY8LF262648
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
49,149 mi
$59,297
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Quicksilver Metallic
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 134,926
- Stock #:
- ZC26070
- VIN:
- 1GT49WEY5MF205616
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
134,926 mi
$46,082
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior color:
- Quicksilver Metallic
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 39,960
- Stock #:
- 12896
- VIN:
- 1GT49WE72LF273569
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
39,960 mi
$56,175
CarGurus Analysis:
2020 GMC Sierra 3500HD
With 472 currently listed for sale and an average price of $51,562.00, 27.8% of 2020 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 GMC Sierra 3500HD 5 / 5 stars.
73.5% of 2020 Sierra 3500HD models on CarGurus are accident free.
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- White Frost Tricoat
- Fuel type:
- Biodiesel
- Interior color:
- Gray (Dark Walnut/Dark Ash Grey)
- Transmission:
- Automatic
- Mileage:
- 148,772
- Stock #:
- 55306
- VIN:
- 1GT49WEY8LF142638
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
148,772 mi
$44,414
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Onyx Black
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 112,121
- Stock #:
- VD1158A
- VIN:
- 1GT49WEY0LF218157
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
112,121 mi
$46,969
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior color:
- White
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 6-Speed Automatic
- Mileage:
- 128,369
- Stock #:
- 171202
- VIN:
- 1GT49TE77MF171202
2021 GMC Sierra 3500HD
SLE Crew Cab 4WD
128,369 mi
$34,390
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Blue
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 81,605
- Stock #:
- T288989
- VIN:
- 1GT49WEY8MF288989
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
81,605 mi
$56,065
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Black (Ebony Twilight Metallic)
- Fuel type:
- Biodiesel
- Interior color:
- Gray (Dark Walnut/Dark Ash Grey)
- Transmission:
- Automatic
- Mileage:
- 100,022
- Stock #:
- H17072B
- VIN:
- 1GT49WEYXMF165968
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
100,022 mi
$50,785
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- White
- Fuel type:
- Biodiesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 120,769
- Stock #:
- 10113X
- VIN:
- 1GT49WEYXMF229829
2021 GMC Sierra 3500HD
Denali Crew Cab LB 4WD
120,769 mi
$46,342
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior color:
- Quicksilver Metallic
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 6-Speed Automatic
- Mileage:
- 48,311
- Stock #:
- STK227802
- VIN:
- 1GT49WE73MF227802
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
48,311 mi
$53,952
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Quicksilver Met
- Fuel type:
- Biodiesel
- Transmission:
- Automatic
- Mileage:
- 198,566
- Stock #:
- P197392
- VIN:
- 1GT42WEY9KF197392
-$1,004
2019 GMC Sierra 3500HD
Denali Crew Cab LB DRW 4WD
198,566 mi
$39,003
$37,998
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- White
- Fuel type:
- Biodiesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 59,981
- Stock #:
- 22778
- VIN:
- 1GT49WEY2MF273923
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
59,981 mi
$55,972
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Exterior color:
- Summit White
- Fuel type:
- Biodiesel
- Interior color:
- Black
- Transmission:
- 6-Speed Automatic
- Mileage:
- 75,472
- Stock #:
- 16084
- VIN:
- 1GT42WEYXKF228276
2019 GMC Sierra 3500HD
Denali Crew Cab LB DRW 4WD
75,472 mi
$51,327
CarGurus Analysis: 2020 GMC Sierra 3500HD
Summary
With 472 currently listed for sale and an average price of $51,562.00, 27.8% of 2020 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 GMC Sierra 3500HD 5 / 5 stars.
73.5% of 2020 Sierra 3500HD models on CarGurus are accident free.
Why it stands out
The 2020 GMC Sierra 3500HD is a standout in the heavy-duty truck segment, known for its impressive towing and hauling capabilities, making it a preferred choice for those who need a reliable workhorse. With a maximum towing capacity of up to 35,500 pounds when properly equipped, it outperforms many competitors in its class. Owners appreciate its robust performance, particularly when pulling heavy loads, and often highlight its comfort and build quality. The Sierra 3500HD also offers a range of luxurious features, especially in higher trims like the Denali, which cater to buyers looking for both functionality and refinement. While some users have noted the absence of certain features like a CD player and have expressed a desire for better lumbar support, the overall consensus is that the Sierra 3500HD provides a strong value proposition in the heavy-duty truck market.
Other model years to consider
- Average price: $69,179.00
- Good/great deal percentage: 29.3%
- User rating: 5 / 5
- Total listings: 1,230
- Average price: $76,670.00
- Good/great deal percentage: 28.7%
- User rating: 5 / 5
- Total listings: 1,179
- Average price: $56,470.00
- Good/great deal percentage: 27.4%
- Total listings: 1,144
This analysis is based on CarGurus' proprietary market data from July 20, 2026, CarGurus experts' opinions, and generative AI.
5.0 Overall rating
Filter by rating
Christine A
Reviewed a 2020 GMC Sierra 3500HD on Jun 16, 2023
Besides the bells and whistles we grabbed this dually because we pull a toy hauler. We went from a sturdy 2500 Dodge Ram to this beauty. We choose the dually 3500 due to the pulling capacity and payload as toy haulers are heavier in front to compensate for the weight that you can put in the back. We have no issues pulling it now and the truck does not squat because the support of the 4 tires. Other friends have regular 3500 and still have issues with the payload and had to put in more money into their vehicle to beef up the suspension when pulling a toy hauler because the payload is less. YOU WONT REGRET BUYING ONE!
Dwayne M
Reviewed a 2020 GMC Sierra 3500HD on Jan 2, 2022
The 2020 GMC Sierra 3500 HD is a great truck and investment. This truck is well built and drives great and is very comfortable to ride in. Plus has great looks.
bill z
Reviewed a 2020 GMC Sierra 3500HD on Oct 18, 2020
better than ford or ram, hard to beat gmc track record
Anonymous
Reviewed a 2020 GMC Sierra 3500HD on Jul 2, 2021
It is missing a CD player. The lumbar support needs more better adjustment.
2020 GMC Sierra 3500HD Trims
| Trim type | MSRP |
|---|---|
| Denali Crew Cab LB 4WD | $65,700 |
| Denali Crew Cab LB DRW 4WD | $66,900 |
| Base Crew Cab LB 4WD | $44,400 |
| Base Crew Cab 4WD | $44,200 |
| SLE Crew Cab 4WD | $48,200 |
| AT4 Crew Cab 4WD | $59,500 |
| SLT Crew Cab 4WD | $56,800 |
| Denali Crew Cab 4WD | $65,500 |
2020 GMC Sierra 3500HD Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2020 GMC Sierra 3500HD prices has changed over time.
See more price trends2020 GMC Sierra 3500HD Pricing Analysis
Pricing by Popular US Cities
Market Area: Nationwide
Key Insights
- Highest Prices in Los Angeles: The average price in Los Angeles, CA ($59,003) is the highest among the listed cities, likely reflecting higher demand and cost of living.
- Lowest Prices in Atlanta: Atlanta, GA ($38,245) offers the lowest average price, indicating a more price-sensitive market or higher inventory turnover.
- Inventory Levels Impact Pricing: Cities with higher inventory, such as Chicago (68 listings) and Dallas (68 listings), show competitive pricing around $54,048 and $55,880, respectively, suggesting a balance between supply and demand.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| Los Angeles, CA | 45 | $59,003 |
| Philadelphia, PA | 70 | $58,998 |
| Chicago, IL | 68 | $54,048 |
| Dallas, TX | 68 | $55,880 |
| Houston, TX | 70 | $46,026 |
| Miami, FL | 53 | $46,900 |
| Washington, DC | 70 | $48,779 |
| Boston, MA | 57 | $52,997 |
| Atlanta, GA | 65 | $38,245 |
Pricing Analysis by Model Year
Key Insights
- Significant New-Car Premium: The 2026 GMC Sierra 3500HD is priced at $91,043, which is approximately 88.5% above its MSRP, indicating strong demand for the latest model.
- Depreciation Trends: Older models, such as the 2014 GMC Sierra 3500HD, show a significant drop in value, with an average price of $28,018, reflecting a depreciation of about 14.5% from its original MSRP.
- Best Value Years: The 2019 model is priced at $43,199, showing a modest depreciation of only -1.5%, making it a potentially attractive option for buyers seeking value.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2026 | $48,200 | $91,043 | +88.5% |
| 2025 | $47,500 | $77,563 | +63.4% |
| 2024 | $46,600 | $70,653 | +51.6% |
| 2023 | $43,400 | $58,758 | +35.3% |
| 2022 | $41,400 | $55,685 | +34.5% |
| 2021 | $37,400 | $53,178 | +42.1% |
| 2019 | $40,800 | $43,199 | -1.5% |
| 2018 | $36,100 | $41,891 | +16.1% |
| 2017 | $35,290 | $38,299 | +8.5% |
| 2016 | $34,635 | $35,992 | +3.9% |
| 2015 | $34,295 | $35,291 | +2.9% |
| 2014 | $32,805 | $28,018 | -14.5% |
These recommendations are based on CarGurus' proprietary market data from July 16, 2026, CarGurus experts' opinions, and generative AI.
FAQs
How much does the 2020 GMC Sierra 3500HD cost in Alabama?
How many 2020 GMC Sierra 3500HD vehicles in Alabama have no reported accidents or damage?
What fuel types are available?
Relevant articles
The Best Dually Trucks of 2026
Trucks have gone quite lux lately, and are more often used to get around town than to get work done. The most capable of these trucks are nicknamed “duallies”, which those equipped with dual rear wheels.
GMC Sierra 3500HD Buying Guide: Cost, Reliability, and the Best Years to Buy
Discover the ultimate buying guide for purchasing a used GMC Sierra 3500HD covering each generation since 1988. Whether you're a first-time buyer or a GMC enthusiast, this comprehensive overview will help you research your next pre-owned GMC Sierra 3500HD.
2025 GMC Sierra 3500HD Pricing, Specs, and Release Date
Like its slightly less beefy 2500HD sibling, the 2025 GMC Sierra 3500HD offers added features for the new model year, including a standard trailer brake controller.
