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  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $74,412

    $1.5K

    MSRP $83,270

    Est. $1,383/mo

    Woody Buick GMC Naperville

    4.9
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    Naperville, IL (19 mi)

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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $81,280

    Est. $1,510/mo

    D'Arcy Buick GMC

    4.4
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    Joliet, IL (24 mi)

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  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $83,317

    $1K

    MSRP $90,905

    Est. $1,548/mo

    Napleton's Schaumburg Buick GMC

    4.2
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    Schaumburg, IL (23 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $80,992

    MSRP $89,860

    Est. $1,505/mo

    Bill Kay Buick GMC

    4.4
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    Downers Grove, IL (12 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $82,599

    $1K
    Est. $1,535/mo

    Al Piemonte Buick GMC

    4.5
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    Elmhurst, IL (13 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $80,309

    $1K

    MSRP $89,065

    Est. $1,492/mo

    Zeigler Buick GMC of Lincolnwood

    4.3
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    Lincolnwood, IL (17 mi)
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  • Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4

    $87,181

    Est. $1,620/mo

    Mike Haggerty Buick GMC

    3.7
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    Oak Lawn, IL (6 mi)
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  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $71,662

    MSRP $79,920

    Est. $1,332/mo

    Woody Buick GMC Naperville

    4.9
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    Naperville, IL (19 mi)

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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $74,912

    MSRP $83,270

    Est. $1,392/mo

    Woody Buick GMC Naperville

    4.9
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    Naperville, IL (19 mi)
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  • Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4

    $77,825

    $7.7K

    MSRP $86,345

    Est. $1,446/mo

    Circle Buick GMC

    3.8
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    Highland, IN (25 mi)
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  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $71,662

    MSRP $79,920

    Est. $1,332/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    Naperville, IL (19 mi)
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  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $74,412

    $1.5K

    MSRP $83,270

    Est. $1,383/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    Naperville, IL (19 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $80,980

    Est. $1,505/mo

    Arnie Bauer Buick GMC of Matteson

    4.4
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    Matteson, IL (20 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $91,126

    Est. $1,693/mo

    D'Arcy Buick GMC

    4.4
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    Joliet, IL (24 mi)

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  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $82,147

    MSRP $90,409

    Est. $1,527/mo

    Castle Buick GMC

    3.7
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    North Riverside, IL (5 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $81,701

    $1K

    MSRP $89,914

    Est. $1,518/mo

    Castle Buick GMC

    3.7
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    North Riverside, IL (5 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $82,361

    $1K

    MSRP $90,729

    Est. $1,531/mo

    Castle Buick GMC

    3.7
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    North Riverside, IL (5 mi)
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  • Coastal Dune 2026 GMC Sierra 2500 AT4

    $83,761

    Est. $1,557/mo

    Fox Valley Buick GMC

    4.3
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    St Charles, IL (27 mi)
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  • Coastal Dune 2026 GMC Sierra 2500 AT4

    $82,682

    MSRP $83,270

    Est. $1,537/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    Naperville, IL (19 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4

    $91,621

    Est. $1,703/mo

    D'Arcy Buick GMC

    4.4
    Check Availability
    Joliet, IL (24 mi)

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  • Coastal Dune 2026 GMC Sierra 2500 AT4

    $90,317

    MSRP $90,905

    Est. $1,678/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    Naperville, IL (19 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4

    $90,317

    MSRP $90,905

    Est. $1,678/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    Naperville, IL (19 mi)
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  • Sterling Metallic 2026 GMC Sierra 2500 AT4

    $81,111

    Est. $1,507/mo

    D'Arcy Buick GMC

    4.4
    Check Availability
    Joliet, IL (24 mi)
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  • Sterling Metallic 2026 GMC Sierra 2500 AT4

    $91,621

    Est. $1,703/mo

    D'Arcy Buick GMC

    4.4
    Check Availability
    Joliet, IL (24 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $79,316

    Est. $1,474/mo

    D'Arcy Buick GMC

    4.4
    Check Availability
    Joliet, IL (24 mi)
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  • Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4

    $88,605

    Est. $1,647/mo

    Arnie Bauer Buick GMC of Matteson

    4.4
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    Matteson, IL (20 mi)

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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $75,775

    Est. $1,408/mo

    Laura Buick GMC

    4.5
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    $485 delivery from Collinsville, IL (243 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $90,698

    Est. $1,685/mo

    Laura Buick GMC

    4.5
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    $485 delivery from Collinsville, IL (243 mi)
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About the 2026 GMC Sierra 2500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
0
Transmission
10-Speed A/T
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2026 GMC Sierra 2500 AT4
FAQs

How much does the 2026 GMC Sierra 2500 AT4 cost?

The 2026 GMC Sierra 2500 AT4 price depends on optional features. Prices typically start at $72,200.

What are some similar vehicles and competitors of the 2026 GMC Sierra 2500 AT4?

The 2026 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:


Trims

AT4 (2 styles)

Style
4WD Crew Cab 159" AT4 4WD Crew Cab 172" AT4
Inventory price
Starting at $72,200 Starting at $72,400
Combined MPG
0 0
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
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2026 GMC Sierra 2500 AT4 by city

GMC Sierra 2500 trims