Used GMC Sierra 1500 AT4 for Sale nearLittleton, CO
337 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:
- 420 hp 6.2L V8
- Exterior color:
- Gray
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 31,690
- Stock #:
- ARZ304612
- VIN:
- 1GTUUEEL6RZ304612
Sponsored by Alpine Buick GMC
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
31,690 mi
Highlands Ranch, CO
2 mi away
Fair Deal
$54,479
- 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:
- Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 66,011
- Stock #:
- 161744
- VIN:
- 1GTUUEEL1PZ161744
Sponsored Listing
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
66,011 mi
Denver, CO
8 mi away
Great Deal
$42,999
- 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:
- Summit White
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 73,942
- Stock #:
- L397814
- VIN:
- 1GTU9EET7MZ397814
New arrival
Sponsored Listing
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
73,942 mi
Longmont, CO
39 mi away
Good Deal
$36,533
- 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:
- 96,055
- Stock #:
- AMZ450078
- VIN:
- 1GTP9EED7MZ450078
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
96,055 mi
Aurora, CO
14 mi away
Fair Deal
$35,588
- 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:
- Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 25,779
- Stock #:
- TCRPSZ296554
- VIN:
- 1GTUUEEL1SZ296554
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
25,779 mi
Denver, CO
20 mi away
Great Deal
$49,498
- 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:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 123,824
- Stock #:
- SP8658
- VIN:
- 3GTP9EEL0LG414061
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
123,824 mi
Thornton, CO
20 mi away
Good Deal
$31,582
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Gray
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 54,426
- Stock #:
- TPZ179255
- VIN:
- 1GTUUEE85PZ179255
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
54,426 mi
Highlands Ranch, CO
2 mi away
Good Deal
$47,102
- 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:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 42,507
- Stock #:
- BC22777
- VIN:
- 1GTUUEELXRZ277625
Price drop
-$1,000
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
42,507 mi
Frederick, CO
36 mi away
Great Deal
$48,594
$47,594
- 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:
- Summit White
- Fuel type:
- Gasoline
- Transmission:
- Automatic
- Mileage:
- 97,359
- Stock #:
- F5003
- VIN:
- 3GTP9EEL3KG245765
2019 GMC Sierra 1500
AT4 Crew Cab 4WD
97,359 mi
Home delivery from Grand Junction, CO
Price includes $274 shipping
Great Deal
$29,850
- 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:
- Summit White
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 38,272
- Stock #:
- P7680
- VIN:
- 1GTUUEEL0SZ312985
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
38,272 mi
Northglenn, CO
20 mi away
Fair Deal
$52,489
- Year:
- 2022
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 277 hp 3L I6 Diesel
- Exterior color:
- White
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 30,482
- Stock #:
- TNG652545
- VIN:
- 3GTUUEET0NG652545
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
30,482 mi
Highlands Ranch, CO
2 mi away
Fair Deal
$47,815
- 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:
- Brown
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 54,932
- Stock #:
- PRZ111338
- VIN:
- 1GTUUEEL0RZ111338
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
54,932 mi
Highlands Ranch, CO
2 mi away
Good Deal
$49,796
- 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:
- Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 70,615
- Stock #:
- J185
- VIN:
- 1GTUUEEL6RZ156820
New arrival
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
70,615 mi
Denver, CO
8 mi away
Good Deal
$46,995
- 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
Aurora, CO
14 mi away
Fair Deal
$43,388
- 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:
- Black
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Transmission:
- Automatic
- Mileage:
- 75,307
- Stock #:
- 26426
- VIN:
- 1GTPUEEL4NZ508364
Photos coming soon
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
75,307 mi
Franktown, CO
20 mi away
Great Deal
$39,950
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Deep Bronze Metallic
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black with Kalahari accents
- Transmission:
- Automatic
- Mileage:
- 36,134
- Stock #:
- U17016
- VIN:
- 1GTUUEE83PZ264207
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
36,134 mi
Henderson, CO
20 mi away
Fair Deal
$50,593
- 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:
- 101,313
- Stock #:
- U1485
- VIN:
- 1GTU9EET8MZ162144
Price drop
-$2,295
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
101,313 mi
Frederick, CO
36 mi away
Good Deal
$34,500
$32,900
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Volcanic Red Tintcoat
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 87,525
- Stock #:
- IN222503
- VIN:
- 3GTUUEE86PG222503
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
87,525 mi
Colorado Springs, CO
46 mi away
Great Deal
$38,888
- 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:
- Onyx Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black
- Transmission:
- Automatic
- Mileage:
- 39,193
- Stock #:
- GT199773A
- VIN:
- 3GTUUEEL4PG310891
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
39,193 mi
Englewood, CO
2 mi away
Good Deal
$48,299
- 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:
- Quicksilver Metallic
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 55,726
- Stock #:
- AP8621
- VIN:
- 1GTPUEELXNZ509213
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
55,726 mi
Thornton, CO
20 mi away
Fair Deal
$47,141
- 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:
- Black
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 66,011
- Stock #:
- 161744
- VIN:
- 1GTUUEEL1PZ161744
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
66,011 mi
Denver, CO
8 mi away
Great Deal
$42,999
- 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 $787 shipping
Good Deal
$29,202
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Transmission:
- Automatic
- Mileage:
- 121,203
- Stock #:
- 226461
- VIN:
- 1GTP9EEL5MZ226461
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
121,203 mi
Home delivery from Portland, OR
Price includes $1,470 shipping
Fair Deal
$32,760
- 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:
- Summit White
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 38,272
- Stock #:
- P7680
- VIN:
- 1GTUUEEL0SZ312985
Sponsored Listing
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
38,272 mi
Northglenn, CO
20 mi away
Fair Deal
$52,489
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 $25,971.00 to $85,174.00 with an average price of $32,598.84. 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 Littleton, CO?
The average GMC Sierra 1500 AT4 costs about $30,984.04. The average price has decreased by -3.7% since last year. The 337 for sale near Littleton, CO on CarGurus, range from $25,971 to $85,174 in price.
How many GMC Sierra 1500 AT4 vehicles in Littleton, CO have no reported accidents or damage?
310 out of 337 for sale near Littleton, CO 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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