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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $47,347

    89,177 mi.
    Est. $841/mo

    Walser Buick GMC Bloomington

    4.2
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    Bloomington, MN (353 mi)

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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $57,850

    35,094 mi.
    Est. $1,027/mo

    Southern Buick GMC Greenbrier

    3.9
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    Chesapeake, VA (703 mi)

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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $58,379

    $488
    49,428 mi.
    Est. $1,037/mo

    Ken Garff Chevrolet

    3.7
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    American Fork, UT (1,258 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $50,199

    $572
    80,049 mi.
    Est. $891/mo

    Cox Chevrolet

    4.6
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    Bradenton, FL (1,037 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $52,933

    $400
    57,480 mi.
    Est. $940/mo

    Suburban Chrysler Dodge Jeep RAM of Farmington Hills

    4.6
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    Farmington Hills, MI (220 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4

    $63,999

    33,103 mi.
    Est. $1,136/mo

    AutoNation Toyota Arapahoe

    4.8
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    Centennial, CO (915 mi)
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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $39,998

    $1K
    127,044 mi.
    Est. $710/mo

    AutoNation Subaru Arapahoe

    4.4
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    Centennial, CO (915 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4

    $55,298

    $600
    52,653 mi.
    Est. $982/mo

    Ron Marhofer Buick GMC

    4.3
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    North Canton, OH (330 mi)

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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $61,407

    5,202 mi.
    Est. $1,090/mo

    Leman's Chevy City

    4.5
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    Bloomington, IL (121 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4

    $52,999

    $401
    46,982 mi.
    Est. $941/mo

    J&S Autohaus Six

    4.7
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    Mount Holly, NJ (682 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4

    $42,689

    100,704 mi.
    Est. $758/mo

    Auto Factory

    4.2
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    Peabody, MA (852 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $52,133

    83,444 mi.
    Est. $926/mo

    Lithia Nissan of Clovis

    4.5
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    Clovis, CA (1,739 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $55,499

    50,601 mi.
    Est. $985/mo

    Mastrovito Chevrolet

    4.6
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    Yorkville, NY (634 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4

    $49,295

    66,990 mi.
    Est. $875/mo

    Lee GMC Truck Center

    4.4
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    Auburn, ME (892 mi)
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  • Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4

    $49,486

    $360
    90,645 mi.
    Est. $879/mo

    Jim Xamis Ford Lincoln

    4.8
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    Lincoln, IL (151 mi)
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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $53,381

    $988
    77,671 mi.
    Est. $948/mo

    Step One Buick GMC Cadillac Pensacola

    4.0
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    Pensacola, FL (789 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $57,900

    66,465 mi.
    Est. $1,028/mo

    Lime Ridge Auto Sales

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    Mount Joy, PA (591 mi)
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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $49,997

    86,876 mi.
    Est. $888/mo

    Michael's Auto Plaza

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    East Greenbush, NY (714 mi)
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  • Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4

    $46,777

    $1.2K
    87,281 mi.
    Est. $831/mo

    New Richmond Auto Mall

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    New Richmond, WI (333 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $47,298

    83,316 mi.
    Est. $840/mo

    Rydell Chevrolet GMC of Grand Forks

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    Grand Forks, ND (620 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $51,900

    93,369 mi.
    Est. $922/mo

    Landers Motors LLC of Gresham

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    Gresham, OR (1,743 mi)
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  • White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4

    $45,900

    118,903 mi.
    Est. $815/mo

    Mark's Auto Mart

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    Fort Dodge, IA (338 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $52,998

    47,462 mi.
    Est. $941/mo

    Gary Yeomans Ford

    4.7
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    Daytona Beach, FL (949 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $47,175

    $420
    90,010 mi.
    Est. $838/mo

    Marty's GMC

    4.7
    Check Availability
    Kingston, MA (869 mi)
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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $51,598

    $3.7K
    76,660 mi.
    Est. $916/mo

    Van Horn Chevrolet of Plymouth

    4.4
    Check Availability
    Plymouth, WI (130 mi)
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  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $47,600

    $1.2K
    119,822 mi.
    Est. $845/mo

    Stevinson Toyota West

    4.3
    Check Availability
    Lakewood, CO (927 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 AT4 12 Great deals
2025 GMC Sierra 2500 AT4 $74,127 41 Great deals
2024 GMC Sierra 2500 AT4 $69,816 76 Great deals
2023 GMC Sierra 2500 AT4 $58,742 15 Great deals
2022 GMC Sierra 2500 AT4 $54,396 14 Great deals
2021 GMC Sierra 2500 AT4 $52,226 6 Great deals

About the 2020 GMC Sierra 2500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
0
Transmission
6-Speed A/T
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2020 GMC Sierra 2500 AT4
FAQs

How much does the 2020 GMC Sierra 2500 AT4 cost?

The 2020 GMC Sierra 2500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 AT4 is $51,301, with pricing starting at $39,998.

What are some similar vehicles and competitors of the 2020 GMC Sierra 2500 AT4?

The 2020 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 2500 AT4 reliable?

The 2020 GMC Sierra 2500 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 2500 owners.

Ratings (23 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.9
Performance
4.8
Value
4.5
Exterior
4.9
Reliability
4.7
Trims

AT4 (2 styles)

Style
4WD Crew Cab 172" AT4 4WD Crew Cab 159" AT4
Inventory price
Starting at $58,500 Starting at $58,300
Combined MPG
0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
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GMC Sierra 2500 trims