Used GMC Sierra 1500 AT4 for Sale nearAlma, CO
361 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:
- Black
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Diesel
- Transmission:
- Automatic
- Mileage:
- 84,922
- Stock #:
- 26477
- VIN:
- 1GTUUEE83RZ175790
New arrival
Sponsored by Sterling Auto
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
84,922 mi
Franktown, CO
72 mi away
Good Deal
$42,950
- Year:
- 2026
- 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:
- 15 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 3,604
- Stock #:
- TG523348A
- VIN:
- 1GTUUEEL3TZ209433
Price drop
-$1,411
Sponsored Listing
2026 GMC Sierra 1500
AT4 Crew Cab 4WD
3,604 mi
Loveland, CO
98 mi away
Good Deal
$62,377
$60,966
- 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:
- Black
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 10-Speed Automatic
- Mileage:
- 101,846
- Stock #:
- 471022
- VIN:
- 3GTP9EEL9MG471022
Sponsored Listing
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
101,846 mi
Denver, CO
65 mi away
Fair Deal
$35,495
- 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
68 mi away
Great Deal
$42,999
- 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 With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 37,234
- Stock #:
- L437700A
- VIN:
- 3GTUUEELXRG437700
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
37,234 mi
Longmont, CO
82 mi away
Good Deal
$51,134
- 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 (Ebony Twilight Metallic)
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 142,835
- Stock #:
- T19405
- VIN:
- 3GTU9EET0MG436534
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
142,835 mi
Home delivery from Las Cruces, NM
Price includes $735 shipping
Good Deal
$29,234
- 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:
- 12,022
- Stock #:
- 3U1769
- VIN:
- 1GTUUEEL9RZ227380
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
12,022 mi
Home delivery from Lenoir, NC
Price includes $1,427 shipping
Great Deal
$54,406
- Year:
- 2023
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Dynamic Blue Metallic
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 52,302
- Stock #:
- PZ103665T
- VIN:
- 1GTUUEE87PZ103665
Price drop
-$1,801
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
52,302 mi
Castle Rock, CO
66 mi away
Great Deal
$44,999
$43,897
- 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
Price drop
-$1,400
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
121,203 mi
Home delivery from Portland, OR
Price includes $1,408 shipping
Great Deal
$31,699
$30,298
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 355 hp 5.3L V8
- 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
75 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:
- 277 hp 3L I6 Diesel
- Exterior color:
- Gray
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 75,268
- Stock #:
- 26-305
- VIN:
- 3GTUUEETXNG612019
Price drop
-$1,000
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
75,268 mi
Home delivery from Vancouver, WA
Price includes $944 shipping
Good Deal
$41,044
$40,044
- Year:
- 2019
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 420 hp 6.2L V8
- Fuel type:
- Gasoline
- Transmission:
- 8-Speed Automatic
- Mileage:
- 61,247
- Stock #:
- KG118105
- VIN:
- 3GTP9EEL6KG118105
New arrival
2019 GMC Sierra 1500
AT4 Crew Cab 4WD
61,247 mi
Colorado Springs, CO
78 mi away
Good Deal
$36,999
- 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:
- Dynamic Blue Metallic
- Combined gas mileage:
- 24 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black with Kalahari accents
- Transmission:
- Automatic
- Mileage:
- 106,540
- Stock #:
- U17119
- VIN:
- 1GTUUEET5NZ616060
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
106,540 mi
Henderson, CO
75 mi away
Fair Deal
$38,184
- 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:
- Red Quartz Tintcoat
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 34,340
- Stock #:
- KZ192069
- VIN:
- 1GTP9EEL2KZ192069
2019 GMC Sierra 1500
AT4 Crew Cab 4WD
34,340 mi
Littleton, CO
59 mi away
Great Deal
$38,405
- 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
71 mi away
Good Deal
$52,299
- 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:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 42,670
- Stock #:
- ARZ277625
- VIN:
- 1GTUUEELXRZ277625
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
42,670 mi
Highlands Ranch, CO
60 mi away
Fair Deal
$52,502
- Year:
- 2024
- Make:
- GMC
- Model:
- Sierra 1500
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 3L I6 Diesel
- Exterior color:
- Thunderstorm Gray
- Combined gas mileage:
- 25 MPG
- Fuel type:
- Diesel
- Interior color:
- Jet Black With Kalahari Accents
- Transmission:
- Automatic
- Mileage:
- 30,136
- Stock #:
- RG302711T
- VIN:
- 3GTUUEE84RG302711
New arrival
2024 GMC Sierra 1500
AT4 Crew Cab 4WD
30,136 mi
Wheat Ridge, CO
62 mi away
Fair Deal
$53,998
- 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:
- 65,020
- Stock #:
- G238264
- VIN:
- 1GTUUEE86PZ238264
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
65,020 mi
Boulder, CO
67 mi away
Good Deal
$43,929
- 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:
- 99,993
- Stock #:
- 21994A
- VIN:
- 1GTP9EEL8LZ362355
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
99,993 mi
Home delivery from Eufaula, OK
Price includes $957 shipping
Good Deal
$34,256
- 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:
- Gray
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 68,369
- Stock #:
- 118731
- VIN:
- 3GTUUEEL8PG118731
2023 GMC Sierra 1500
AT4 Crew Cab 4WD
68,369 mi
Home delivery from Houston, TX
Price includes $891 shipping
Great Deal
$44,030
- 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:
- Black
- Combined gas mileage:
- 16 MPG
- Fuel type:
- Gasoline
- Interior color:
- Black
- Transmission:
- 10-Speed Automatic
- Mileage:
- 101,846
- Stock #:
- 471022
- VIN:
- 3GTP9EEL9MG471022
2021 GMC Sierra 1500
AT4 Crew Cab 4WD
101,846 mi
Denver, CO
65 mi away
Fair Deal
$35,495
- 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:
- White
- Combined gas mileage:
- 17 MPG
- Fuel type:
- Gasoline
- Interior color:
- Jet Black With Kalahari Accents, Perforated Leathe
- Transmission:
- Automatic
- Mileage:
- 16,504
- Stock #:
- ASZ313416
- VIN:
- 1GTUUEELXSZ313416
2025 GMC Sierra 1500
AT4 Crew Cab 4WD
16,504 mi
Highlands Ranch, CO
60 mi away
Fair Deal
$56,555
- 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:
- 64,869
- Stock #:
- LZ313838
- VIN:
- 1GTP9EEL3LZ313838
Price drop
-$2,350
2020 GMC Sierra 1500
AT4 Crew Cab 4WD
64,869 mi
Lone Tree, CO
67 mi away
Good Deal
$40,999
$38,649
- 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
- Interior color:
- Black
- Transmission:
- Automatic
- Mileage:
- 76,514
- Stock #:
- T18663
- VIN:
- 1GTPUEEL4NZ642677
Sponsored Listing
2022 GMC Sierra 1500
AT4 Crew Cab 4WD
76,514 mi
Parker, CO
73 mi away
Fair Deal
$41,900
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 $24,124.00 to $85,238.75 with an average price of $32,294.11. 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 Alma, CO?
The average GMC Sierra 1500 AT4 costs about $30,875.95. The average price has decreased by -4.5% since last year. The 315 for sale near Alma, CO on CarGurus, range from $24,124 to $85,239 in price.
How many GMC Sierra 1500 AT4 vehicles in Alma, CO have no reported accidents or damage?
283 out of 315 for sale near Alma, 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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