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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

    $29,171

    115,653 mi.
    Est. $550/mo

    East Hartford Chevrolet

    4.6
    East Hartford, CT (771 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

    $39,594

    $1K
    60,782 mi.
    Est. $746/mo

    CAL Cars Airway

    4.5
    Airway Heights, WA (1,511 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

    $34,088

    115,047 mi.
    Est. $642/mo

    Exclusive Auto Wholesale

    4.9
    Pelham, AL (594 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

    $37,379

    $1.6K
    71,281 mi.
    Est. $704/mo

    Willis Automotive

    4.7
    Des Moines, IA (316 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

    $43,078

    $1.9K
    36,377 mi.
    Est. $812/mo

    Mercedes-Benz of South Bay

    4.3
    Torrance, CA (1,756 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

    $33,294

    $810
    78,421 mi.
    Est. $627/mo

    Feldman Chevrolet of Livonia

    4.6
    Livonia, MI (222 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

    $21,986

    201,079 mi.
    Est. $414/mo

    Van Horn Chrysler Dodge Jeep Ram Fiat of Plymouth

    4.7
    Plymouth, WI (130 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

    $32,604

    $347
    96,061 mi.
    Est. $614/mo

    Howdy Honda

    4.8
    Austin, TX (983 mi)
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  • White 2021 GMC Sierra 1500 AT4White 2021 GMC Sierra 1500 AT4White 2021 GMC Sierra 1500 AT4White 2021 GMC Sierra 1500 AT4White 2021 GMC Sierra 1500 AT4White 2021 GMC Sierra 1500 AT4

    $29,200

    143,318 mi.
    Est. $550/mo

    Fountain Buick GMC

    4.7
    Orlando, FL (993 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

    $28,348

    $1K
    150,000 mi.
    Est. $534/mo

    Luther Park Place BMW

    4.8
    Rochester, MN (288 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

    $41,340

    $1.1K
    59,826 mi.
    Est. $779/mo

    Perkins Chrysler Dodge Jeep RAM

    4.8
    Colorado Springs, CO (929 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

    $34,168

    96,660 mi.
    Est. $644/mo

    Toyota of Des Moines

    4.6
    Grimes, IA (317 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

    $38,075

    $1.6K
    55,546 mi.
    Est. $717/mo

    Romeo Toyota of Glens Falls

    4.7
    Glens Falls, NY (717 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

    $37,311

    $100
    72,708 mi.
    Est. $703/mo

    Good Chevrolet

    4.0
    Renton, WA (1,728 mi)
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  • Satin 2021 GMC Sierra 1500 AT4Satin 2021 GMC Sierra 1500 AT4Satin 2021 GMC Sierra 1500 AT4Satin 2021 GMC Sierra 1500 AT4Satin 2021 GMC Sierra 1500 AT4Satin 2021 GMC Sierra 1500 AT4

    $38,895

    $695
    77,709 mi.
    Est. $733/mo

    Champion Chevrolet - Cadillac

    4.7
    Johnson City, TN (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

    $39,686

    41,354 mi.
    Est. $748/mo

    EchoPark Automotive Birmingham

    4.9
    Birmingham, AL (581 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

    $32,346

    $500
    92,507 mi.
    Est. $609/mo

    Luther North Country Ford

    4.7
    Minneapolis, MN (363 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

    $35,660

    $1.3K
    81,917 mi.
    Est. $672/mo

    Downtown Nashville Nissan

    4.5
    Nashville, TN (396 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

    $37,900

    75,009 mi.
    Est. $714/mo

    Twin Pine Ford

    4.5
    Ephrata, PA (609 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

    $32,882

    $700
    100,474 mi.
    Est. $619/mo

    Akins Ford

    4.8
    Winder, GA (585 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

    $40,214

    76,281 mi.
    Est. $758/mo

    Classic Chevrolet Beaumont

    4.5
    Beaumont, TX (891 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

    $40,995

    $520
    52,963 mi.
    Est. $772/mo

    AutoNation Chevrolet West Austin

    4.4
    Austin, TX (972 mi)
    Check Availability
  • 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

    $32,999

    $2.5K
    88,619 mi.
    Est. $622/mo

    Van Horn Chrysler Dodge Jeep RAM of Manitowoc

    4.9
    Manitowoc, WI (152 mi)
    Check Availability
  • 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

    $34,314

    $759
    73,234 mi.
    Est. $646/mo

    LaFontaine Chrysler Dodge Jeep Ram of Walled Lake

    4.6
    Walled Lake, MI (218 mi)
    Check Availability
  • 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

    $32,680

    $1.2K
    88,262 mi.
    Est. $616/mo

    Pat McGrath Chevyland

    4.3
    Cedar Rapids, IA (208 mi)
    Check Availability
  • 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

    $28,212

    $505
    134,642 mi.
    Est. $531/mo

    Hyundai of Columbia

    4.8
    Columbia, TN (433 mi)
    Check Availability
  • 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

    $44,872

    6,644 mi.
    Est. $845/mo

    Laura Buick GMC

    4.5
    Collinsville, IL (254 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

    $34,230

    120,568 mi.
    Est. $645/mo

    Shottenkirk Toyota of Granbury

    4.3
    Granbury, TX (854 mi)
    Check Availability
  • 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

    $35,899

    81,000 mi.
    Est. $676/mo

    Town & Country Ford

    4.8
    Charlotte, NC (594 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

    $35,149

    $1.7K
    80,310 mi.
    Est. $662/mo

    Lake Country Toyota

    4.5
    Baxter, MN (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

    $37,996

    83,254 mi.
    Est. $716/mo

    Battleground Kia

    4.6
    Greensboro, NC (578 mi)
    Check Availability

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 AT4 101 Great deals
2025 GMC Sierra 1500 AT4 $53,680 112 Great deals
2024 GMC Sierra 1500 AT4 $50,269 148 Great deals
2023 GMC Sierra 1500 AT4 $46,548 95 Great deals
2022 GMC Sierra 1500 AT4 $42,789 38 Great deals
2020 GMC Sierra 1500 AT4 $34,495 77 Great deals
2019 GMC Sierra 1500 AT4 $32,695 47 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 $36,008, with pricing starting at $19,400.

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)

2021 GMC Sierra 1500 trims