Used GMC Sierra 1500 AT4 for Sale nearHarlem, MT
235 vehicles found
Shop with transparent pricing.
Only show listings that include dealer fees- Year:
- 2024
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Sterling Metallic
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 37,434
- Stock #:
- ZC26465
- VIN:
- 1GTUUEE86RZ211357
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
37,434 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Great Deal
$49,974
- 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
- Transmission:
- Automatic
- Mileage:
- 90,012
- Stock #:
- VC26162
- VIN:
- 1GTU9EET9MZ174397
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
90,012 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Great Deal
$33,584
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Sterling Metallic
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 39,492
- Stock #:
- ZC26461
- VIN:
- 1GTUUEEL9PZ153939
New arrival
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
39,492 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Good Deal
$49,974
- 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:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 74,518
- Stock #:
- ZC26468
- VIN:
- 1GTU9EET1MZ186169
New arrival
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
74,518 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Fair Deal
$38,109
- Year:
- 2025
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 20,572
- Stock #:
- ZC26485
- VIN:
- 1GTUUEE88SZ329884
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
20,572 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Good Deal
$55,824
- 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:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 76,704
- Stock #:
- 357255
- VIN:
- 3GTU9EET6MG357255
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
76,704 mi
Home delivery from Cadiz, KY
Price includes $1,986 shipping
Fair Deal
$39,403
- 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:
- Cardinal Red
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black w/Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 71,499
- Stock #:
- 38441
- VIN:
- 1GTU9EET1MZ284943
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
71,499 mi
Home delivery from Fort Wayne, IN
Price includes $1,249 shipping
Fair Deal
$38,209
- 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:
- 122,811
- Stock #:
- DN308461
- VIN:
- 3GTU9EET8LG308461
New arrival
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
122,811 mi
Home delivery from Houston, TX
Price includes $1,327 shipping
Great Deal
$29,742
- Year:
- 2025
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 25,184
- Stock #:
- ZC26488
- VIN:
- 1GTUUEE86SZ213079
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
25,184 mi
Home delivery from Hicksville, OH
Price includes $1,584 shipping
Good Deal
$55,384
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Summit White
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 75,513
- Stock #:
- C3067A
- VIN:
- 1GTUUEE87PZ167382
Price drop
-$1,000
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
75,513 mi
Home delivery from Whitefish, MT
Price includes $534 shipping
Good Deal
$44,119
$43,119
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Exterior color:
- Dynamic Blue Metallic
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 56,703
- Stock #:
- DC26186A
- VIN:
- 1GTUUEEL3PZ156822
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
56,703 mi
Home delivery from Delphos, OH
Price includes $1,626 shipping
Good Deal
$47,021
- 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:
- Smokey Quartz Metallic
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- 8-Speed Automatic
- Mileage:
- 103,305
- Stock #:
- S288177
- VIN:
- 1GTP9EED2KZ288177
2019 GMC Sierra 1500
AT4 Crew Cab 4WD
103,305 mi
Home delivery from Greensboro, NC
Price includes $1,692 shipping
Fair Deal
$33,491
- 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:
- Summit White
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 85,468
- Stock #:
- T0319
- VIN:
- 1GTU9EET0LZ342278
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
85,468 mi
Home delivery from Canal Fulton, OH
Price includes $2,134 shipping
Good Deal
$34,380
- 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:
- Onyx Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 81,801
- Stock #:
- U260918428T1
- VIN:
- 3GTU9EET0MG331248
New arrival
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
81,801 mi
Home delivery from Davie, FL
Price includes $4,350 shipping
Great Deal
$34,844
- 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:
- Carbon Black Metallic
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 105,644
- Stock #:
- 6-2022
- VIN:
- 1GTP9EEL7LZ299877
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
105,644 mi
Home delivery from Mesa, AZ
Price includes $1,315 shipping
Good Deal
$34,998
- 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 (Dark Sky Metallic)
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- 10-Speed Automatic
- Mileage:
- 94,253
- Stock #:
- A88051
- VIN:
- 1GTP9EED3MZ368039
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
94,253 mi
Home delivery from Herculaneum, MO
Price includes $2,308 shipping
Fair Deal
$36,653
- 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:
- Summit White
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 112,043
- Stock #:
- TR132348M
- VIN:
- 3GTU9EET8LG132348
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
112,043 mi
Home delivery from McKinney, TX
Price includes $1,531 shipping
Fair Deal
$33,849
- 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:
- Blue
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 48,371
- Stock #:
- IF598999S
- VIN:
- 1GTPUEEL2NZ598999
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
48,371 mi
Home delivery from Idaho Falls, ID
Price includes $556 shipping
Fair Deal
$48,556
- Year:
- 2024
- 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:
- 26,459
- Stock #:
- T12617
- VIN:
- 3GTUUEEL6RG102000
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
26,459 mi
Home delivery from Buda, TX
Price includes $2,090 shipping
Good Deal
$52,810
- Year:
- 2025
- 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 With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 38,512
- Stock #:
- 313896
- VIN:
- 1GTUUEEL6SZ313896
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
38,512 mi
Home delivery from Plano, TX
Price includes $2,460 shipping
Fair Deal
$52,679
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Sterling Metallic
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 25,892
- Stock #:
- T6225B
- VIN:
- 1GTUUEE8XPZ203890
Price drop
-$2,025
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
25,892 mi
Home delivery from Las Vegas, NV
Price includes $912 shipping
Great Deal
$51,884
$49,859
- 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:
- Black
- Combined gas mileage:
- 18 MPG
- Fuel type:
- Gasoline
- Interior color:
- 4Sb--Leather, Jet Black / Kalahari, Interior Trim
- Transmission:
- Automatic
- Mileage:
- 39,117
- Stock #:
- AMZ294011
- VIN:
- 1GTP9EED5MZ294011
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
39,117 mi
Home delivery from Aurora, CO
Price includes $948 shipping
Fair Deal
$44,336
- 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:
- Onyx Black
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 127,236
- Stock #:
- BG236279
- VIN:
- 1GTP9EEL0MZ236279
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
127,236 mi
Home delivery from Burley, ID
Price includes $723 shipping
Fair Deal
$32,922
- Year:
- 2025
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Onyx Black
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 13,473
- Stock #:
- T295119
- VIN:
- 1GTUUEE86SZ295119
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
13,473 mi
Home delivery from Addison, TX
Price includes $1,851 shipping
Fair Deal
$59,575
Overview
The GMC Sierra 1500 is a spacious and capable pickup. It is offered in a number of trims providing a wide array of creature comforts. While GMC might be more sooner associated with the chrome-clad Denali variants, the Sierra is also available in more outdoorsy trims, such as the AT4. Designed as a sort of the anti-Denali, the AT4 is designed to get muddy. It features a 2-inch lift, Rancho shocks, upgraded underbody skid plates, an Auto-Trap two-speed transfer case, and a locking rear differential. The AT4 is not without niceties, as it receives a unique black interior with Kalahari accents and a host of creature comforts. The AT4 trim was introduced with the redesigned Sierra 1500 in 2019 and has continued through the 1500’s 2022 model year update.
Key Features
- Gas V8, Duramax Turbodiesel I6
- 2-inch suspension lift w/ Rancho shocks
- Skid plates
- Heated/ventilated front seats, leather upholstery
- Touchscreen infotainment w/ Apple CarPlay, Android Auto
Pricing Details
In Crew Cab configuration, the 2023 GMC Sierra 1500 AT4 carries a $66,700 MSRP. Used examples on CarGurus range from $27,386.00 to $86,256.25 with an average price of $32,575.02. The Sierra 1500 AT4 is available with a number of options packages. The Premium Package adds a number of upgraded driver assistance features. The Technology Package adds a head-up display, bed view camera, and rear camera mirror. The AT4 Preferred Package adds a universal garage door opener, adaptive cruise control, and a power-sliding rear window with a defogger.
Specifications
Performance
Engine
6.2-liter gas V8, 3.0-liter turbodiesel I6
Transmission
Eight-speed automatic (gas), 10-speed automatic (diesel)
Drivetrain
Four-wheel drive (4WD)
Horsepower/Torque
420 hp/460 lb-ft (gas) / 277 hp/460 lb-ft (diesel)
0-60 mph
5.8 seconds
MPG
24 mpg city, 34 mpg highway, 28 combined (6AT) / 26 mpg city, 36 mpg highway, 30 combined (5MT)
Curb weight
4,816 pounds
Dimensions
wheelbase
147.53 inches
length
231.72 inches
width
81.24 inches
height
78.35 inches
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
4.0 Overall rating
Filter by rating
Anonymous
Reviewed a 2019 GMC AT4 Crew Cab 4WD on Sep 9, 2024
The truck had all the features I wanted and the price was in-line, or better with others in my search.
Is this review helpful?
Buddy H
Reviewed a 2019 GMC AT4 Crew Cab 4WD on Jan 5, 2025
Slightly over priced for the miles I would pay $29000-$30000 all day
Is this review helpful?
FAQs
How much does the GMC Sierra 1500 AT4 cost in Harlem, MT?
The average GMC Sierra 1500 AT4 costs about $30,984.04. The average price has decreased by -3.7% since last year. The 235 for sale near Harlem, MT on CarGurus, range from $27,386 to $86,256 in price.
How many GMC Sierra 1500 AT4 vehicles in Harlem, MT have no reported accidents or damage?
217 out of 235 for sale near Harlem, MT have no reported accidents or damage.
What is the fuel economy of the GMC Sierra 1500 AT4?
Depending on the engine and options, the GMC Sierra 1500 AT4 gets between 15 and 24 MPG/MPGe.
What fuel types are available?
Diesel, Gasoline engines are available.
*CarGurus meticulously monitors the prices of millions of pre-owned vehicle listings, offering users precise and up-to-date market insights. Historical pricing data excludes any additional dealer fees as of May 3, 2026.
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