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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

    $500
    78,375 mi.
    Est. $752/mo

    Bozard Lincoln

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    St. Augustine, FL (896 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

    $34,998

    $500
    75,182 mi.
    Est. $658/mo

    Husker Auto Group

    4.7
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    Lincoln, NE (474 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

    $42,595

    $200
    65,500 mi.
    Est. $801/mo

    i.g. Burton Chevrolet of Seaford

    4.7
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    Seaford, DE (673 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

    $40,795

    70,745 mi.
    Est. $767/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 AT4

    $34,000

    $1.3K
    112,057 mi.
    Est. $639/mo

    Honda World

    4.9
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    Conway, AR (538 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

    $31,987

    125,011 mi.
    Est. $601/mo

    Royal Automotive

    4.9
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    Birmingham, AL (587 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

    4.4
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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

    $36,995

    126,528 mi.
    Est. $695/mo

    ALL STAR BUICK GMC TRUCK

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    Sulphur, LA (866 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

    $30,499

    $1.2K
    121,795 mi.
    Est. $573/mo

    Group 1 Chevrolet Spring

    4.3
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    Houston, TX (927 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

    $39,500

    $1.4K
    71,658 mi.
    Est. $742/mo

    Classic of Cleburne Chevrolet/Buick/GMC

    4.9
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    Cleburne, TX (851 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

    $35,500

    $400
    102,014 mi.
    Est. $667/mo

    Classic of Cleburne Chevrolet/Buick/GMC

    4.9
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    Cleburne, TX (851 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

    $34,000

    109,720 mi.
    Est. $639/mo

    Koons Chevrolet of White Marsh

    4.7
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    White Marsh, MD (612 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

    $35,577

    $3.1K
    103,268 mi.
    Est. $669/mo

    Mullinax Buick GMC

    4.8
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    Montgomery, AL (662 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

    $43,379

    64,383 mi.
    Est. $815/mo

    Landers Toyota

    4.1
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    Little Rock, AR (559 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

    $38,889

    85,599 mi.
    Est. $731/mo

    McDonough Hyundai

    4.4
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    McDonough, GA (615 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

    $34,995

    121,462 mi.
    Est. $658/mo

    Bob Howard Nissan

    4.7
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    Oklahoma City, OK (686 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

    $43,995

    51,986 mi.
    Est. $827/mo

    Peterson Auto Group

    4.3
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    Boise, ID (1,452 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

    $38,900

    70,436 mi.
    Est. $731/mo

    Atlantic Chevrolet Cadillac

    4.8
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    Bay Shore, NY (750 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

    $41,838

    65,961 mi.
    Est. $786/mo

    Freeman Buick GMC

    3.2
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    Grapevine, TX (807 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

    $39,999

    75,143 mi.
    Est. $752/mo

    Group 1 Chevrolet Hub City

    4.8
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    Lubbock, TX (966 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

    $43,990

    36,867 mi.
    Est. $827/mo

    Mercedes-Benz of Portland

    4.2
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    Portland, OR (1,755 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

    $43,993

    39,990 mi.
    Est. $827/mo

    Gresham Chrysler Dodge Jeep Ram

    4.6
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    Gresham, OR (1,742 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

    $44,920

    41,503 mi.
    Est. $844/mo

    Akins Ford

    4.8
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    Winder, GA (585 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

    $40,646

    41,997 mi.
    Est. $764/mo

    Ron Marhofer Hyundai

    4.5
    Check Availability
    Cuyahoga Falls, OH (323 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

    $40,999

    83,164 mi.
    Est. $771/mo

    Starling Buick GMC Stuart

    4.9
    Check Availability
    Stuart, FL (1,095 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

    $34,299

    $300
    101,297 mi.
    Est. $645/mo

    Lake Country Toyota

    4.6
    Check Availability
    Baxter, MN (452 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

    $37,238

    $762
    94,035 mi.
    Est. $700/mo

    Bob Sight Ford

    5.0
    Check Availability
    Lees Summit, MO (411 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 AT4 24 Great deals
2025 GMC Sierra 1500 AT4 $60,110 80 Great deals
2024 GMC Sierra 1500 AT4 $55,468 23 Great deals
2023 GMC Sierra 1500 AT4 $50,208 11 Great deals
2022 GMC Sierra 1500 AT4 $45,039 36 Great deals
2020 GMC Sierra 1500 AT4 $36,818 42 Great deals
2019 GMC Sierra 1500 AT4 $33,517 15 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 $38,137, 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