Skip to main content
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed
Skip to Filters
  • Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4

    $28,399

    $100
    126,730 mi.
    Est. $504/mo

    PAW - Public Auto Wholesale

    Check Availability
    St. Cloud, MN (411 mi)

    Quick view
  • 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
    Check Availability
    Prince George, VA (633 mi)

    Quick view
  • 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

    $35,348

    100,486 mi.
    Est. $628/mo

    Victory Toyota Marietta

    4.4
    Check Availability
    Marietta, OH (369 mi)
    Quick view
  • 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
    Check Availability
    Lancaster, PA (603 mi)
    Quick view
  • Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4

    $44,377

    $2K
    34,904 mi.
    Est. $788/mo

    James Wood Motors, Inc

    4.8
    Check Availability
    Decatur, TX (809 mi)
    Quick view
  • 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

    $39,920

    52,706 mi.
    Est. $709/mo

    Ken Garff Honda Riverdale

    4.8
    Check Availability
    Riverdale, UT (1,257 mi)
    Quick view
  • 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)
    Quick view
  • 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
    Check Availability
    Saint Cloud, FL (1,008 mi)

    Quick view
  • 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
    Check Availability
    Delavan, WI (73 mi)
    Quick view
  • 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

    $35,164

    120,119 mi.
    Est. $624/mo

    Shottenkirk Toyota of Weatherford

    4.8
    Check Availability
    Weatherford, TX (838 mi)
    Quick view
  • 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
    Check Availability
    Bellevue, NE (433 mi)
    Quick view
  • 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
    Check Availability
    Charleston, SC (755 mi)
    Quick view
  • Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4Dark Sky Metallic 2020 GMC Sierra 1500 AT4

    $31,650

    $1.3K
    124,503 mi.
    Est. $562/mo

    Sandy Sansing Chevrolet

    4.6
    Check Availability
    Pensacola, FL (789 mi)
    Quick view
  • 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

    $34,484

    50,840 mi.
    Est. $612/mo

    CarHeroes

    4.4
    Check Availability
    Tampa, FL (1,001 mi)

    Quick view
  • 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

    4.5
    Check Availability
    Miami, FL (1,191 mi)
    Quick view
  • 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

    $1K
    92,810 mi.
    Est. $586/mo

    Mercedes-Benz of Fort Lauderdale

    4.0
    Check Availability
    Fort Lauderdale, FL (1,172 mi)
    Quick view
  • Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4Smokey Quartz Metallic 2020 GMC Sierra 1500 AT4

    $31,837

    $3.2K
    103,632 mi.
    Est. $565/mo

    Sheehan Buick GMC

    4.7
    Check Availability
    Lighthouse Point, FL (1,161 mi)
    Quick view
  • 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

    $28,418

    $298
    135,960 mi.
    Est. $505/mo

    Jeff Belzer's Lakeville

    4.7
    Check Availability
    Lakeville, MN (340 mi)
    Quick view
  • 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
    Check Availability
    Beaumont, TX (891 mi)
    Quick view
  • 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

    Check Availability
    Grand Junction, CO (1,116 mi)

    Quick view
  • 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

    4.5
    Check Availability
    Soquel, CA (1,851 mi)
    Quick view
  • 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
    Check Availability
    Bartow, FL (1,020 mi)
    Quick view
  • 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)
    Quick view
  • 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

    $32,200

    105,530 mi.
    Est. $572/mo

    Serra Mazda Brighton

    4.7
    Check Availability
    Brighton, MI (203 mi)
    Quick view
  • 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

    $35,744

    78,884 mi.
    Est. $635/mo

    Auto Solutions

    4.5
    Check Availability
    Maryville, TN (468 mi)
    Quick view
  • 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

    $59,995

    39,343 mi.
    Est. $1,065/mo

    Granbury Nissan

    3.6
    Check Availability
    Granbury, TX (854 mi)

    Quick view
  • 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)
    Quick view
  • 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)
    Quick view
  • 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

    $35,512

    $500
    82,611 mi.
    Est. $631/mo

    O'Brien Nissan of Bloomington

    4.9
    Check Availability
    Bloomington, IL (121 mi)
    Quick view
  • Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4

    $34,940

    77,101 mi.
    Est. $620/mo

    Chrysler Dodge Jeep RAM of Utica

    4.4
    Check Availability
    Yorkville, NY (634 mi)
    Quick view

GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 AT4 33 Great deals
2025 GMC Sierra 1500 AT4 $59,327 109 Great deals
2024 GMC Sierra 1500 AT4 $55,271 87 Great deals
2023 GMC Sierra 1500 AT4 $50,418 155 Great deals
2022 GMC Sierra 1500 AT4 $45,326 115 Great deals
2021 GMC Sierra 1500 AT4 $38,329 150 Great deals
2019 GMC Sierra 1500 AT4 $34,009 48 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 $36,597, with pricing starting at $25,547.

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)
Skip to Listings
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed

GMC Sierra 1500 trims