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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $33,952

    $1K
    96,335 mi.
    Est. $638/mo

    Chevrolet of Culver City

    3.9
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    Culver City, CA (1,752 mi)

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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $40,000

    78,375 mi.
    Est. $752/mo

    Bozard Lincoln

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    St. Augustine, FL (896 mi)

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  • Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 1500 AT4

    $35,999

    83,748 mi.
    Est. $677/mo

    Rydell Chevrolet GMC of Grand Forks

    4.6
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    Grand Forks, ND (620 mi)
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  • Sky 2021 GMC Sierra 1500 AT4Sky 2021 GMC Sierra 1500 AT4Sky 2021 GMC Sierra 1500 AT4Sky 2021 GMC Sierra 1500 AT4Sky 2021 GMC Sierra 1500 AT4Sky 2021 GMC Sierra 1500 AT4

    $42,513

    $2.3K
    33,681 mi.
    Est. $799/mo

    DePaula Chevrolet

    4.7
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    Albany, NY (710 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $42,988

    $2K
    63,974 mi.
    Est. $808/mo

    Randy Marion Buick GMC of Huntersville

    4.7
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    Huntersville, NC (578 mi)
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  • Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4

    $40,849

    $100
    62,765 mi.
    Est. $768/mo

    Luther Family Ford

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    Fargo, ND (569 mi)
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  • Steel Metallic 2021 GMC Sierra 1500 AT4Steel Metallic 2021 GMC Sierra 1500 AT4Steel Metallic 2021 GMC Sierra 1500 AT4Steel Metallic 2021 GMC Sierra 1500 AT4Steel Metallic 2021 GMC Sierra 1500 AT4Steel Metallic 2021 GMC Sierra 1500 AT4

    $42,495

    $100
    65,500 mi.
    Est. $799/mo

    i.g. Burton Chevrolet of Seaford

    4.7
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    Seaford, DE (673 mi)
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  • Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4

    $34,498

    $1K
    75,182 mi.
    Est. $648/mo

    Husker Auto Group

    4.7
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    Lincoln, NE (474 mi)

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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $38,172

    $1K
    73,239 mi.
    Est. $718/mo

    CDJR of Leesburg

    4.5
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    Fruitland Park, FL (957 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $32,991

    $470
    104,914 mi.
    Est. $620/mo

    Ford of Columbia

    4.7
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    Columbia, TN (436 mi)
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  • Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4

    $37,989

    82,517 mi.
    Est. $714/mo

    Kearns Motor Car Co.

    4.6
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    Johnson Creek, WI (101 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $39,297

    $474
    59,864 mi.
    Est. $739/mo

    Advantage Chevrolet

    4.7
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    Hodgkins, IL (14 mi)
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  • Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4Cardinal Red 2021 GMC Sierra 1500 AT4

    $37,967

    95,526 mi.
    Est. $714/mo

    Group 1 Ford of Hub City

    4.7
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    Lubbock, TX (968 mi)
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  • Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4

    $36,995

    109,071 mi.
    Est. $695/mo

    Discovery Auto Group

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    Grand Junction, CO (1,116 mi)

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  • Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4Black 2021 GMC Sierra 1500 AT4

    $35,634

    $329
    82,522 mi.
    Est. $670/mo

    Elder Ford of Tampa

    4.3
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    Tampa, FL (1,000 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $37,500

    91,053 mi.
    Est. $705/mo

    Jim Norton's T-Town Chevrolet

    4.9
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    Tulsa, OK (597 mi)
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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $33,996

    101,758 mi.
    Est. $639/mo

    Luther Brookdale Chevrolet

    4.5
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    BROOKLYN CENTER, MN (361 mi)
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  • Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4

    $41,938

    $635
    51,220 mi.
    Est. $788/mo

    Perrysburg Automall

    4.6
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    Perrysburg, OH (208 mi)
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  • Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4

    $38,895

    $1.9K
    70,745 mi.
    Est. $731/mo

    Hill Country Honda

    4.4
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    San Antonio, TX (1,048 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $31,998

    $4.9K
    126,528 mi.
    Est. $601/mo

    ALL STAR BUICK GMC TRUCK

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    Sulphur, LA (866 mi)

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  • Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4Dark Sky Metallic 2021 GMC Sierra 1500 AT4

    $39,487

    83,353 mi.
    Est. $742/mo

    Jim Norton Toyota OKC

    4.9
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    Oklahoma City, OK (694 mi)
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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $36,366

    $223
    103,667 mi.
    Est. $684/mo

    Randy Marion Buick GMC of Huntersville

    4.7
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    Huntersville, NC (578 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $35,825

    $165
    105,993 mi.
    Est. $673/mo

    Hawkins Chevrolet

    4.6
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    Fairmont, MN (367 mi)
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  • Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4Onyx Black 2021 GMC Sierra 1500 AT4

    $40,995

    $1K
    50,918 mi.
    Est. $771/mo

    Kunes Buick GMC of Greenfield

    4.2
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    Greenfield, WI (79 mi)
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  • Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4Summit White 2021 GMC Sierra 1500 AT4

    $34,900

    121,462 mi.
    Est. $656/mo

    Bob Howard Nissan

    4.7
    Check Availability
    Oklahoma City, OK (686 mi)
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  • Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4Satin Steel Metallic 2021 GMC Sierra 1500 AT4

    $42,953

    67,111 mi.
    Est. $807/mo

    Hardy Superstore

    4.8
    Check Availability
    Dallas, GA (572 mi)

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  • Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4Ebony Twilight Metallic 2021 GMC Sierra 1500 AT4

    $43,095

    $401
    43,193 mi.
    Est. $810/mo

    The Sunbury Motor Company

    4.9
    Check Availability
    Sunbury, PA (567 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 AT4 22 Great deals
2025 GMC Sierra 1500 AT4 $60,161 75 Great deals
2024 GMC Sierra 1500 AT4 $55,628 29 Great deals
2023 GMC Sierra 1500 AT4 $50,489 16 Great deals
2022 GMC Sierra 1500 AT4 $44,984 35 Great deals
2020 GMC Sierra 1500 AT4 $36,839 44 Great deals
2019 GMC Sierra 1500 AT4 $34,031 11 Great deals

About the 2021 GMC Sierra 1500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
17
Transmission
10-Speed A/T
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2021 GMC Sierra 1500 AT4
FAQs

How much does the 2021 GMC Sierra 1500 AT4 cost?

The 2021 GMC Sierra 1500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 1500 AT4 is $38,290, with pricing starting at $21,995.

What is the MPG of the 2021 GMC Sierra 1500 AT4?

The 2021 GMC Sierra 1500 AT4 offers up to 15 MPG in city driving and 21 MPG on the highway for a combined rating of 17 MPG.

These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.

What are some similar vehicles and competitors of the 2021 GMC Sierra 1500 AT4?

The 2021 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:


Is the 2021 GMC Sierra 1500 AT4 reliable?

The 2021 GMC Sierra 1500 has an average reliability rating of 3.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 1500 owners.

Ratings (56 reviews)

60% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.2
Interior
4.2
Performance
3.8
Value
3.6
Exterior
4.3
Reliability
3.5
Trims

AT4 (2 styles)

Style
4WD Crew Cab 157" AT4 4WD Crew Cab 147" AT4
Inventory price
Starting at $55,900 Starting at $54,700
Combined MPG
16 17
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
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GMC Sierra 1500 trims