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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $30,900

    114,981 mi.
    Est. $549/mo

    Starling Chevrolet GMC

    4.9
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    Saint Cloud, FL (1,008 mi)

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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $38,498

    106,268 mi.
    Est. $684/mo

    Crossroads Ford Prince George

    4.3
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    Prince George, VA (633 mi)

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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $33,500

    116,944 mi.
    Est. $595/mo

    Master Buick GMC

    4.8
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    Augusta, GA (653 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4

    $38,996

    71,849 mi.
    Est. $692/mo

    Chapman Ford Lancaster

    4.9
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    Lancaster, PA (603 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4

    $39,097

    63,376 mi.
    Est. $694/mo

    Colonial South Chevrolet

    4.7
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    North Dartmouth, MA (857 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4

    $39,490

    $430
    52,706 mi.
    Est. $701/mo

    Ken Garff Honda Riverdale

    4.8
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    Riverdale, UT (1,257 mi)
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  • Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4

    $40,950

    88,695 mi.
    Est. $727/mo

    Chevrolet of South Anchorage

    4.6
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    Anchorage, AK (2,849 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $39,990

    68,900 mi.
    Est. $710/mo

    Lorenzo Buick GMC

    4.4
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    Miami, FL (1,188 mi)

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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $43,216

    41,586 mi.
    Est. $767/mo

    Gay Family Auto

    4.8
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    Dickinson, TX (954 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $39,643

    $304
    73,375 mi.
    Est. $704/mo

    Shottenkirk Chevrolet

    4.7
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    Waukee, IA (323 mi)
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  • Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4

    $37,628

    85,169 mi.
    Est. $668/mo

    Kunes Chevrolet Cadillac of Delavan

    4.2
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    Delavan, WI (73 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $36,635

    $366
    80,340 mi.
    Est. $650/mo

    Van Horn Chrysler Dodge Jeep Ram Fiat of Plymouth

    4.7
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    Plymouth, WI (130 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4

    $37,105

    $483
    92,835 mi.
    Est. $659/mo

    Modern Subaru of Boone

    4.9
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    Boone, NC (506 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $34,505

    $1.4K
    121,059 mi.
    Est. $613/mo

    Discovery Auto Group

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    Grand Junction, CO (1,116 mi)

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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $34,974

    $190
    120,119 mi.
    Est. $621/mo

    Shottenkirk Toyota of Weatherford

    4.8
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    Weatherford, TX (838 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4Satin Steel Metallic 2020 GMC Sierra 1500 AT4

    $29,000

    $799
    154,953 mi.
    Est. $515/mo

    Corwin Toyota of Bellevue

    4.5
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    Bellevue, NE (433 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $36,911

    $793
    96,709 mi.
    Est. $655/mo

    Rick Hendrick Dodge Chrysler Jeep RAM Charleston

    4.2
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    Charleston, SC (755 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4

    $34,058

    $170
    141,260 mi.
    Est. $605/mo

    Honda of Newnan

    4.8
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    Newnan, GA (608 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $32,999

    92,810 mi.
    Est. $586/mo

    Mercedes-Benz of Fort Lauderdale

    4.0
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    Fort Lauderdale, FL (1,172 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4

    $43,963

    83,077 mi.
    Est. $781/mo

    Mitchell Buick GMC

    4.8
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    San Angelo, TX (1,012 mi)

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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $41,998

    81,032 mi.
    Est. $746/mo

    Classic Chevrolet Beaumont

    4.5
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    Beaumont, TX (891 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $34,118

    99,483 mi.
    Est. $606/mo

    AutoNation Chevrolet Coral Gables

    4.4
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    Miami, FL (1,191 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $40,581

    87,818 mi.
    Est. $721/mo

    Thunder Chrysler Dodge Jeep Ram

    4.2
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    Bartow, FL (1,020 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $46,950

    1,344 mi.
    Est. $834/mo

    Ocean Honda Santa Cruz

    4.4
    Check Availability
    Soquel, CA (1,851 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $35,000

    $1K
    118,291 mi.
    Est. $621/mo

    Baxter Toyota Lincoln

    4.9
    Check Availability
    Lincoln, NE (476 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $39,953

    63,712 mi.
    Est. $709/mo

    Hardy Superstore

    4.8
    Check Availability
    Dallas, GA (572 mi)

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  • Gray 2020 GMC Sierra 1500 AT4Gray 2020 GMC Sierra 1500 AT4Gray 2020 GMC Sierra 1500 AT4Gray 2020 GMC Sierra 1500 AT4Gray 2020 GMC Sierra 1500 AT4Gray 2020 GMC Sierra 1500 AT4

    $39,997

    36,507 mi.
    Est. $710/mo

    Noblesville Imports

    4.8
    Check Availability
    Noblesville, IN (157 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 1500 AT4Carbon Black Metallic 2020 GMC Sierra 1500 AT4Carbon Black Metallic 2020 GMC Sierra 1500 AT4Carbon Black Metallic 2020 GMC Sierra 1500 AT4Carbon Black Metallic 2020 GMC Sierra 1500 AT4Carbon Black Metallic 2020 GMC Sierra 1500 AT4

    $33,443

    $500
    94,818 mi.
    Est. $594/mo

    Monroe Nissan

    4.5
    Check Availability
    Monroe, NC (605 mi)
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  • BLACK 2020 GMC Sierra 1500 AT4BLACK 2020 GMC Sierra 1500 AT4BLACK 2020 GMC Sierra 1500 AT4BLACK 2020 GMC Sierra 1500 AT4BLACK 2020 GMC Sierra 1500 AT4BLACK 2020 GMC Sierra 1500 AT4

    $39,689

    63,970 mi.
    Est. $705/mo

    Auto Factory

    4.2
    Check Availability
    Peabody, MA (852 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $42,981

    38,156 mi.
    Est. $763/mo

    Port Orchard Ford

    4.7
    Check Availability
    Port Orchard, WA (1,747 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 AT4 40 Great deals
2025 GMC Sierra 1500 AT4 $59,314 115 Great deals
2024 GMC Sierra 1500 AT4 $55,229 119 Great deals
2023 GMC Sierra 1500 AT4 $50,384 162 Great deals
2022 GMC Sierra 1500 AT4 $45,312 118 Great deals
2021 GMC Sierra 1500 AT4 $38,328 146 Great deals
2019 GMC Sierra 1500 AT4 $33,982 43 Great deals

About the 2020 GMC Sierra 1500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
18
Transmission
10-Speed A/T
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2020 GMC Sierra 1500 AT4
FAQs

How much does the 2020 GMC Sierra 1500 AT4 cost?

The 2020 GMC Sierra 1500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 AT4 is $36,592, with pricing starting at $24,633.

What is the MPG of the 2020 GMC Sierra 1500 AT4?

The 2020 GMC Sierra 1500 AT4 offers up to 16 MPG in city driving and 21 MPG on the highway for a combined rating of 18 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 2020 GMC Sierra 1500 AT4?

The 2020 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 1500 AT4 reliable?

The 2020 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 1500 owners.

Ratings (69 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Trims

AT4 (3 styles)

Style
4WD Double Cab 147" AT4 4WD Crew Cab 157" AT4 4WD Crew Cab 147" AT4
Inventory price
Starting at $51,300 Starting at $54,000 Starting at $53,700
Combined MPG
18 18 18
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 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