Used 2020 GMC Sierra 1500 for Sale Nationwide
6,392 results
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 277 hp 3L I6 Diesel
- Exterior color:
- Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 123,733
- Stock #:
- 342621
- VIN:
- 3GTU9DET6LG342621
2020 GMC Sierra 1500
SLT Crew Cab 4WD
123,733 mi
$28,999
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Gray (Satin Steel Metallic)
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray (DARK WALNUT/DARK ASH GREY)
- Transmission:
- Automatic
- Mileage:
- 70,668
- Stock #:
- G7281A
- VIN:
- 3GTU9FEL5LG370387
2020 GMC Sierra 1500
Denali Crew Cab 4WD
70,668 mi
$38,999
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Summit White
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 87,532
- Stock #:
- LD36653TB
- VIN:
- 1GTP9EEL2LZ344269
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
87,532 mi
$36,207
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Summit White
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 6-Speed Automatic
- Mileage:
- 67,583
- Stock #:
- 36865A
- VIN:
- 3GTU9AEF7MG218254
-$896
2021 GMC Sierra 1500
Crew Cab 4WD
67,583 mi
$29,886
$28,990
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 112,226
- Stock #:
- E50249
- VIN:
- 3GTU9FEL7LG280223
2020 GMC Sierra 1500
Denali Crew Cab 4WD
112,226 mi
$32,423
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 310 hp 2.7L I4
- Exterior color:
- White
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 60,792
- Stock #:
- 210148771
- VIN:
- 1GTR9CEK8MZ421118
2021 GMC Sierra 1500
Elevation Double Cab 4WD
60,792 mi
$27,450
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 277 hp 3L I6 Diesel
- Exterior color:
- Blue
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 118,118
- Stock #:
- 6GM0550T
- VIN:
- 3GTU9DET7MG359848
2021 GMC Sierra 1500
SLT Crew Cab 4WD
118,118 mi
$28,269
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Summit White
- Fuel type:
- Gasoline
- Interior color:
- Black (Charcoal)
- Transmission:
- 6-Speed Automatic
- Mileage:
- 63,425
- Stock #:
- 3189
- VIN:
- 1GTR9AEF8MZ164503
2021 GMC Sierra 1500
Double Cab 4WD
63,425 mi
$27,995
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 52,857
- Stock #:
- C20245PC
- VIN:
- 1GTU9AEF0LZ215288
-$2,498
2020 GMC Sierra 1500
Crew Cab 4WD
52,857 mi
$33,479
$30,981
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Gray (Steel Metallic)
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black W/Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 81,905
- Stock #:
- GUA07801
- VIN:
- 3GTP9EEL1LG407801
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
81,905 mi
$37,425
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Gray
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Gray
- Transmission:
- Automatic
- Mileage:
- 71,935
- Stock #:
- 21302914T
- VIN:
- 3GTU9FED0MG302914
2021 GMC Sierra 1500
Denali Crew Cab 4WD
71,935 mi
$40,072
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Summit White
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black with Kalahari accents
- Transmission:
- Automatic
- Mileage:
- 44,334
- Stock #:
- 7672A
- VIN:
- 1GTP9EEL2LZ166959
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
44,334 mi
$42,999
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 77,120
- Stock #:
- P0822A
- VIN:
- 1GTU9FEL4KZ181907
2019 GMC Sierra 1500
Denali Crew Cab 4WD
77,120 mi
$37,677
CarGurus Analysis:
2020 GMC Sierra 1500
With 6,292 currently listed for sale and an average price of $34,226.00, 31.5% of 2020 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 GMC Sierra 1500 4.28 / 5 stars.
75.7% of 2020 Sierra models on CarGurus are accident free.
The 2020 GMC Sierra 1500 features advanced technology, impressive cargo management tools, and a range of powerful engines, including a turbocharged 4-cylinder option.
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 310 hp 2.7L I4
- Exterior color:
- Summit White
- Combined gas mileage:
- 20 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 59,350
- Stock #:
- FV202
- VIN:
- 3GTP9CEK5LG258420
2020 GMC Sierra 1500
Elevation Crew Cab 4WD
59,350 mi
$31,585
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Gray (Satin Steel Metallic)
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 82,355
- Stock #:
- 26UG067
- VIN:
- 1GTU9CED7MZ209290
2021 GMC Sierra 1500
Elevation Crew Cab 4WD
82,355 mi
$33,244
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 86,376
- Stock #:
- PLG1445
- VIN:
- 1GTU9DELXKZ154103
-$1,159
2019 GMC Sierra 1500
SLT Crew Cab 4WD
86,376 mi
$34,398
$33,239
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Green
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Green
- Transmission:
- Automatic
- Mileage:
- 103,010
- Stock #:
- M26-193
- VIN:
- 3GTU9BED0LG340795
2020 GMC Sierra 1500
SLE Crew Cab 4WD
103,010 mi
$26,988
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 277 hp 3L I6 Diesel
- Exterior color:
- Red Quartz Tintcoat
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 124,517
- Stock #:
- G829A
- VIN:
- 3GTU9CET5LG296287
2020 GMC Sierra 1500
Elevation Crew Cab 4WD
124,517 mi
$25,450
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Gray (Dark Sky Metallic)
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 47,767
- Stock #:
- 26FT050A
- VIN:
- 3GTU9BED8LG267918
-$1,024
2020 GMC Sierra 1500
SLE Crew Cab 4WD
47,767 mi
$32,733
$31,709
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 310 hp 2.7L I4
- Exterior color:
- Summit White
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 65,782
- Stock #:
- BB5648
- VIN:
- 3GTP9BEK2MG197815
2021 GMC Sierra 1500
SLE Crew Cab 4WD
65,782 mi
$31,275
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- 4X2
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Gray
- Fuel type:
- Gasoline
- Mileage:
- 99,092
- Stock #:
- 264971
- VIN:
- 3GTP8FED9LG264971
2020 GMC Sierra 1500
Denali Crew Cab RWD
99,092 mi
$30,998
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- White
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 82,322
- Stock #:
- Y0945
- VIN:
- 1GTR9CED2KZ344261
2019 GMC Sierra 1500
Elevation Double Cab 4WD
82,322 mi
$27,803
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Summit White
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 72,026
- Stock #:
- P10448A
- VIN:
- 3GTU9DED1LG406086
2020 GMC Sierra 1500
SLT Crew Cab 4WD
72,026 mi
$34,449
CarGurus Analysis: 2020 GMC Sierra 1500
overall
Summary
With 6,292 currently listed for sale and an average price of $34,226.00, 31.5% of 2020 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2020 GMC Sierra 1500 4.28 / 5 stars.
75.7% of 2020 Sierra models on CarGurus are accident free.
The 2020 GMC Sierra 1500 features advanced technology, impressive cargo management tools, and a range of powerful engines, including a turbocharged 4-cylinder option.
Why it stands out
The 2020 GMC Sierra 1500 is a standout in the full-size pickup truck segment, thanks to its impressive blend of functionality, comfort, and cutting-edge technology. With multiple engine options including a robust V8, a turbocharged 4-cylinder, and a powerful turbodiesel, the Sierra provides versatility for various driver needs, from heavy towing to daily commuting. Notably, the truck's improved infotainment system is user-friendly, featuring clear graphics and tactile controls that many drivers appreciate over competing models with massive touchscreens. While some owners have reported issues with engine performance and mixed feedback on interior design, the Sierra remains popular for its spacious and well-equipped cabin, making it suitable for both work and leisure. The AT4 trim, in particular, attracts buyers looking for an off-road-capable vehicle that doesn't compromise on comfort.
Other model years to consider
- Average price: $53,301.00
- Good/great deal percentage: 33.5%
- User rating: 5 / 5
- Total listings: 9,569
- Average price: $43,768.00
- Good/great deal percentage: 32.7%
- User rating: 5 / 5
- Total listings: 9,163
- Average price: $50,458.00
- Good/great deal percentage: 33.5%
- User rating: 4.6 / 5
- Total listings: 9,521
This analysis is based on CarGurus' proprietary market data from June 8, 2026, CarGurus experts' opinions, and generative AI.
Relevant articles
The Best Trucks Under $25,000 in 2026
New trucks cost more than ever, but the prices of used ones finally seem to be cooling. You still can't find the latest and fanciest full-sizes for budget prices, but fortunately, there are plenty of good trucks under $25,000 these days. Here, we've assembled a list of the best.
Best Truck Lease Deals in June 2026
Leasing a truck can be a great way to get into one of the latest models, with the best technology, at a more affordable monthly price. Here are the best deals we've found this month.
Best Car Deals in June 2026
In the market for a new or used car this year? Whether you’re looking to buy or lease, we’ve collated a list of the best car deals available this month.
4.3 Overall rating
Filter by rating
Jeremy S
Reviewed a 2020 GMC Denali Crew Cab 4WD on Nov 23, 2024
Great truck, great value, awesome vehicle accessories package. Highly recommend this truck.
Heriberto M
Reviewed a 2020 GMC Sierra 1500 on Jun 24, 2024
It’s a reliable truck great engine and just a great choice for pickup truck
Rodney C
Reviewed a 2020 GMC Sierra 1500 on Jun 30, 2025
Body dented and scratches, former work truck , transmission shutter , definitely abused, four wheel clunks when engaged , not a good value
Deborah E
Reviewed a 2020 GMC Sierra 1500 on Aug 7, 2022
Absolutely stunning vehicle. Pure luxury pick-up truck. Serious power, w/a 6.2L V8 engine; smooth, wonderful ride, lots of driver convenience & safety features; comfortable seating, roomy cab interior....I could go on. GMC has left nothing out of their Sierra Denali line. Beautiful truck - everyone Ive talked to feels the same. Commanding presence on the road. Tops Dodge Ram & Ford models, in my opinion. I have a 2020 model. The 2023 model tops even THAT!!!
2020 GMC Sierra 1500 Trims
| Trim type | MSRP |
|---|---|
| Elevation Double Cab 4WD | $43,800 |
| Elevation Crew Cab RWD | $42,900 |
| SLE Crew Cab 4WD | $43,700 |
| SLT Crew Cab RWD | $46,900 |
| Elevation Crew Cab 4WD | $46,200 |
| AT4 Crew Cab 4WD | $53,700 |
| Denali Crew Cab 4WD | $58,600 |
| SLT Crew Cab 4WD | $50,400 |
2020 GMC Sierra 1500 Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2020 GMC Sierra 1500 prices has changed over time.
See more price trends2020 GMC Sierra 1500 Pricing Analysis
Pricing by Popular US Cities
Market Area: Nationwide
Key Insights
- Highest Prices in Chicago: The average price in Chicago, IL ($35,494) reflects a strong demand dynamic, despite a good inventory of 573 listings.
- Best Value in Miami: Miami, FL ($29,919) offers the lowest average price, indicating a potentially price-sensitive market or greater inventory turnover.
- Stable Pricing Across Large Inventories: Cities like Houston (599 listings) and Atlanta (651 listings) show average prices around $32,500, suggesting a healthy balance of supply and demand.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| Chicago, IL | 573 | $35,494 |
| Philadelphia, PA | 467 | $35,463 |
| Atlanta, GA | 651 | $33,505 |
| New York, NY | 431 | $32,324 |
| Dallas, TX | 208 | $32,216 |
| Houston, TX | 599 | $32,526 |
| Los Angeles, CA | 325 | $31,983 |
| Washington, DC | 471 | $32,923 |
| Boston, MA | 440 | $33,068 |
| Miami, FL | 359 | $29,919 |
Pricing Analysis by Model Year
Key Insights
- Significant Premium on New Models: The 2026 GMC Sierra 1500 averages $62,084, indicating strong demand leading to prices ~62.2% above MSRP.
- Rapid Depreciation for Older Models: Significant drops in price begin with the 2019 model, which is now -9.9% below MSRP, underscoring the steep depreciation associated with aging vehicles.
- Best Value Years are Recent: The 2021 model offers a balanced choice with minimal depreciation at -6.2%, making it an attractive option for shoppers.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2026 GMC Sierra 1500 | $38,300 | $62,084 | +62.2% |
| 2025 GMC Sierra 1500 | $38,300 | $54,145 | +41.4% |
| 2024 GMC Sierra 1500 | $37,700 | $50,822 | +34.7% |
| 2023 GMC Sierra 1500 | $37,100 | $46,747 | +26.0% |
| 2022 GMC Sierra 1500 | $35,400 | $43,811 | +23.7% |
| 2021 GMC Sierra 1500 | $30,100 | $36,315 | +20.6% |
| 2019 GMC Sierra 1500 | $29,600 | $32,376 | -9.9% |
| 2018 GMC Sierra 1500 | $29,000 | $26,591 | -8.3% |
| 2017 GMC Sierra 1500 | $28,405 | $23,558 | -17.2% |
| 2016 GMC Sierra 1500 | $27,815 | $21,032 | -24.4% |
| 2015 GMC Sierra 1500 | $26,670 | $19,684 | -26.2% |
| 2014 GMC Sierra 1500 | $26,075 | $17,146 | -34.0% |
These recommendations are based on CarGurus' proprietary market data from June 11, 2026, CarGurus experts' opinions, and generative AI.
