Used 2021 GMC Sierra 1500 for Sale nearSlidell, LA
539 vehicles found
- 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:
- White Frost Tricoat
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 69,709
- Stock #:
- 133093
- VIN:
- 3GTU9DELXLG351760
Sponsored by Gulfport Nissan
2020 GMC Sierra 1500
SLT Crew Cab 4WD
69,709 mi
$39,762
- 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 (Satin Steel Metallic)
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 61,423
- Stock #:
- 26G2049A
- VIN:
- 3GTU9DED4LG222308
Sponsored Listing
2020 GMC Sierra 1500
SLT Crew Cab 4WD
61,423 mi
$38,974
- Year:
- 2021
- 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:
- Dark Walnut/slate
- Transmission:
- Automatic
- Mileage:
- 78,200
- Stock #:
- 229333DTA
- VIN:
- 3GTU9DEL0MG119931
Sponsored Listing
2021 GMC Sierra 1500
SLT Crew Cab 4WD
78,200 mi
$35,738
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 2 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Summit White
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 6-Speed Automatic
- Mileage:
- 75,688
- Stock #:
- LOP22254
- VIN:
- 3GTN9AEF7MG308864
-$500
2021 GMC Sierra 1500
LB 4WD
75,688 mi
$23,952
$23,452
- 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:
- Dark Walnut/slate
- Transmission:
- Automatic
- Mileage:
- 29,644
- Stock #:
- 26G2119A
- VIN:
- 3GTU9DED8LG204488
2020 GMC Sierra 1500
SLT Crew Cab 4WD
29,644 mi
$40,224
- Year:
- 2022
- 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:
- 69,193
- Stock #:
- PFS1424A
- VIN:
- 3GTUUGEDXNG690465
2022 GMC Sierra 1500
Denali Crew Cab 4WD
69,193 mi
$46,124
- Year:
- 2021
- 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 (Dark Sky Metallic)
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black w/Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 121,173
- VIN:
- 1GTP9EEL5MZ226461
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
121,173 mi
$32,931
- 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:
- Quicksilver Metallic
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 107,499
- Stock #:
- 4UT11129
- VIN:
- 1GTU9BET2MZ320671
2021 GMC Sierra 1500
SLE Crew Cab 4WD
107,499 mi
$25,119
- Year:
- 2022
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Silver
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Brown
- Transmission:
- Automatic
- Mileage:
- 120,398
- Stock #:
- 14316
- VIN:
- 3GTPUEELXNG578533
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
120,398 mi
$38,996
- Year:
- 2022
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- 4X2
- Engine:
- 310 hp 2.7L I4
- Exterior color:
- Titanium
- Combined gas mileage:
- 20 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 8-Speed Automatic
- Mileage:
- 39,053
- Stock #:
- 268407A
- VIN:
- 1GTPHCEK2NZ632634
2022 GMC Sierra 1500
Elevation Crew Cab RWD
39,053 mi
$36,709
- 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:
- Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 47,106
- Stock #:
- 28885258
- VIN:
- 3GTU9FET2MG445404
2021 GMC Sierra 1500
Denali Crew Cab 4WD
47,106 mi
$42,647
- 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:
- Gray
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 80,517
- Stock #:
- 27794998
- VIN:
- 3GTU9CET6MG201673
2021 GMC Sierra 1500
Elevation Crew Cab 4WD
80,517 mi
$35,097
- 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:
- Pacific Blue Metallic
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 94,662
- Stock #:
- 26G2283A
- VIN:
- 3GTU9DED5MG176960
2021 GMC Sierra 1500
SLT Crew Cab 4WD
94,662 mi
$35,999
CarGurus Analysis:
2021 GMC Sierra 1500
With 6,759 currently listed for sale and an average price of $36,147.00, 33.9% of 2021 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 GMC Sierra 1500 4.9 / 5 stars.
81.0% of 2021 Sierra models on CarGurus are accident free.
The 2021 GMC Sierra 1500 offers advanced technology, exceptional engine performance, and luxury features that provide great value for money, though some owners noted minor annoyances.
- 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:
- Onyx Black
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black with Kalahari accents
- Transmission:
- Automatic
- Mileage:
- 66,487
- Stock #:
- TG347177A
- VIN:
- 3GTP9EED3MG363049
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
66,487 mi
$40,700
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Blue
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 37,072
- Stock #:
- 70081280
- VIN:
- 3GTU9FELXMG389678
2021 GMC Sierra 1500
Denali Crew Cab 4WD
37,072 mi
$45,147
- 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:
- Gray (Dark Sky Metallic)
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Dark Walnut/Slate
- Transmission:
- Automatic
- Mileage:
- 83,051
- Stock #:
- 18823C
- VIN:
- 1GTU9DET8MZ393457
2021 GMC Sierra 1500
SLT Crew Cab 4WD
83,051 mi
$34,593
- 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:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 69,956
- Stock #:
- 100473
- VIN:
- 3GTP9EEL6LG162204
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
69,956 mi
$38,925
- Year:
- 2022
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- 4X2
- Engine:
- 355 hp 5.3L V8
- Exterior color:
- Pacific Blue Metallic
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 98,586
- Stock #:
- 26G2257A
- VIN:
- 3GTPHDED4NG525852
2022 GMC Sierra 1500
SLT Crew Cab RWD
98,586 mi
$34,224
- 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:
- White
- Combined gas mileage:
- 19 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 65,957
- Stock #:
- MX4588
- VIN:
- 1GTU9CED4LZ316201
2020 GMC Sierra 1500
Elevation Crew Cab 4WD
65,957 mi
$33,956
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- 4X2
- Engine:
- 277 hp 3L I6 Diesel
- Exterior color:
- Silver
- Combined gas mileage:
- 26 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 53,035
- Stock #:
- 1376
- VIN:
- 3GTP8DET1LG282330
2020 GMC Sierra 1500
SLT Crew Cab RWD
53,035 mi
$34,584
- Year:
- 2022
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 310 hp 2.7L I4
- Exterior color:
- Gray
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 56,982
- Stock #:
- 28935629
- VIN:
- 3GTPUJEK9NG678591
2022 GMC Sierra 1500
Elevation Standard Crew Cab 4WD
56,982 mi
$34,297
- 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:
- Gray (Satin Steel Metallic)
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black with Kalahari accents
- Transmission:
- Automatic
- Mileage:
- 125,189
- Stock #:
- G28300A
- VIN:
- 1GTU9EET8MZ404513
Preparing for a close up...
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2021 GMC Sierra 1500
AT4 Crew Cab 4WD
125,189 mi
$29,381
- Year:
- 2021
- 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:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 99,183
- Stock #:
- W0468
- VIN:
- 3GTU9DEL7MG244246
Sponsored Listing
2021 GMC Sierra 1500
SLT Crew Cab 4WD
99,183 mi
$32,500
CarGurus Analysis: 2021 GMC Sierra 1500
overall
Summary
With 6,759 currently listed for sale and an average price of $36,147.00, 33.9% of 2021 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2021 GMC Sierra 1500 4.9 / 5 stars.
81.0% of 2021 Sierra models on CarGurus are accident free.
The 2021 GMC Sierra 1500 offers advanced technology, exceptional engine performance, and luxury features that provide great value for money, though some owners noted minor annoyances.
Why it stands out
The 2021 GMC Sierra 1500 is known for its combination of luxury and functionality, making it a standout in the competitive pickup truck market. Owners consistently commend the Sierra for its impressive engine performance, particularly praising the available Duramax turbodiesel engine that offers a perfect blend of power and efficiency. This engine not only enhances towing capacity but also ensures remarkable fuel economy on challenging terrains. Apart from its robust performance, the Sierra boasts advanced technology, including multiple camera systems and an intuitive infotainment setup, which enhances its usability while driving. Despite some criticisms regarding the interior materials feeling less premium in certain trims, the Sierra's upscale Denali version provides a notable upscale experience, appealing to buyers seeking comfort along with capability.
Other model years to consider
- Average price: $43,445.00
- Good/great deal percentage: 33.9%
- User rating: 5 / 5
- Total listings: 9,420
- Average price: $50,216.00
- Good/great deal percentage: 35.1%
- User rating: 4.64 / 5
- Total listings: 9,688
- Average price: $52,978.00
- Good/great deal percentage: 34.7%
- User rating: 5 / 5
- Total listings: 9,610
This analysis is based on CarGurus' proprietary market data from June 29, 2026, CarGurus experts' opinions, and generative AI.
5.0 Overall rating
Filter by rating
Matthew B
Reviewed a 2021 GMC AT4 Crew Cab 4WD on Jan 7, 2025
Best truck I have driven! Highway speeds are great and feels like I’m driving a Cadillac.
Brandon S
Reviewed a 2021 GMC SLT Crew Cab 4WD on Apr 1, 2026
Love the SLT and all the features it has definitely a great value and good driving truck with good suspension and quality
Donald P
Reviewed a 2021 GMC Sierra 1500 on Oct 8, 2023
I love everything about this truck, so much I bought one. I got one with the 3liter duramax. Hopefully it’ll be the last truck I’ll ever own.
Randy R
Reviewed a 2021 GMC Sierra 1500 on Jun 6, 2023
The features on the 2021 GMC Sierra was everything and more then what I expected. The value of the truck was decent considering the times we live in now. Would highly recommend GMC so far
2021 GMC Sierra 1500 Trims
| Trim type | MSRP |
|---|---|
| Elevation Crew Cab RWD | $45,700 |
| SLT Crew Cab RWD | $47,500 |
| SLE Crew Cab 4WD | $47,100 |
| Elevation Double Cab 4WD | $46,400 |
| Elevation Crew Cab 4WD | $49,000 |
| Denali Crew Cab 4WD | $59,300 |
| SLT Crew Cab 4WD | $50,800 |
| AT4 Crew Cab 4WD | $54,700 |
2021 GMC Sierra 1500 Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2021 GMC Sierra 1500 prices has changed over time.
See more price trends2021 GMC Sierra 1500 Pricing Analysis
Pricing by Popular US Cities
Market Area: Nationwide
Key Insights
- Highest Prices in Washington, DC: The market in Washington, DC commands the highest average price at $36,323, likely due to higher demand and limited supply in urban areas.
- Lowest Prices in 2014 Sierra 1500: The 2014 GMC Sierra 1500 is available at the lowest average price of $17,259, indicating significant depreciation for older models.
- Inventory Variation: Cities like Chicago (597 listings) and Atlanta (643 listings) have substantial inventory, which correlates with relatively stable pricing around $35K.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| Washington, DC | 473 | $36,323 |
| Philadelphia, PA | 486 | $35,822 |
| Chicago, IL | 597 | $35,695 |
| Dallas, TX | 212 | $34,622 |
| Los Angeles, CA | 339 | $33,656 |
| Miami, FL | 363 | $33,158 |
| Houston, TX | 642 | $34,223 |
| New York, NY | 452 | $34,187 |
| Boston, MA | 463 | $34,443 |
| Atlanta, GA | 643 | $35,267 |
Pricing Analysis by Model Year
Key Insights
- Significant New-Car Premium: The 2026 GMC Sierra 1500 is priced at $61,417, which is approximately 60.0% above its MSRP, indicating strong demand for the latest model.
- Depreciation Trends: The 2019 model shows a price drop of -8.5% compared to its original MSRP, reflecting typical depreciation patterns for vehicles over time.
- Best Value Years: The 2022 model is priced at $43,557, which is only -2.4% below MSRP, making it a compelling option for buyers seeking newer vehicles with minimal depreciation.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2026 | $38,300 | $61,417 | +60.0% |
| 2025 | $38,300 | $53,519 | +39.7% |
| 2024 | $37,700 | $50,570 | +34.0% |
| 2023 | $37,100 | $46,645 | +25.7% |
| 2022 | $35,400 | $43,557 | -2.4% |
| 2020 | $29,600 | $33,964 | +14.8% |
| 2019 | $29,600 | $32,046 | -8.5% |
| 2018 | $29,000 | $26,627 | -8.0% |
| 2017 | $28,405 | $23,521 | -17.3% |
| 2016 | $27,815 | $20,819 | -25.2% |
| 2015 | $26,670 | $19,366 | -27.7% |
| 2014 | $26,075 | $17,259 | -33.8% |
These recommendations are based on CarGurus' proprietary market data from July 2, 2026, CarGurus experts' opinions, and generative AI.
FAQs
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