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  • TAN 2026 GMC Sierra 2500 AT4

    $92,675

    MSRP $92,675

    Est. $1,642/mo

    Legacy Westbank Buick GMC

    4.5
    Harvey, LA (19 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $83,495

    $9.5K

    MSRP $93,080

    Est. $1,479/mo

    Legacy Westbank Buick GMC

    4.5
    Harvey, LA (19 mi)
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  • White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4

    $91,303

    MSRP $91,355

    Est. $1,617/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4

    $89,013

    MSRP $89,065

    Est. $1,577/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4

    $91,798

    $1K

    MSRP $91,850

    Est. $1,626/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4

    $92,427

    MSRP $92,479

    Est. $1,637/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4

    $92,427

    MSRP $92,479

    Est. $1,637/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • TAN 2026 GMC Sierra 2500 AT4

    $83,990

    MSRP $93,575

    Est. $1,488/mo

    Legacy Westbank Buick GMC

    4.5
    Harvey, LA (19 mi)
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  • Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4

    $91,128

    $1K

    MSRP $91,180

    Est. $1,614/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4Black 2026 GMC Sierra 2500 AT4

    $91,128

    $1K

    MSRP $91,180

    Est. $1,614/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4Tan 2026 GMC Sierra 2500 AT4

    $89,508

    MSRP $89,560

    Est. $1,586/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4

    $91,303

    MSRP $91,355

    Est. $1,617/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4

    $93,708

    MSRP $93,760

    Est. $1,660/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4

    $82,990

    $10K

    MSRP $93,575

    Est. $1,470/mo

    Legacy Westbank Buick GMC

    4.5
    Harvey, LA (19 mi)
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  • White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4White 2026 GMC Sierra 2500 AT4

    $91,932

    $1K

    MSRP $91,984

    Est. $1,629/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4

    $91,128

    MSRP $91,180

    Est. $1,614/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4

    $91,798

    MSRP $91,850

    Est. $1,626/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4Gray 2026 GMC Sierra 2500 AT4

    $92,427

    MSRP $92,479

    Est. $1,637/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Red 2026 GMC Sierra 2500 AT4Red 2026 GMC Sierra 2500 AT4Red 2026 GMC Sierra 2500 AT4Red 2026 GMC Sierra 2500 AT4Red 2026 GMC Sierra 2500 AT4Red 2026 GMC Sierra 2500 AT4

    $91,658

    MSRP $91,710

    Est. $1,624/mo

    Crown Buick GMC

    4.7
    Metairie, LA (15 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $75,190

    MSRP $75,190

    Est. $1,332/mo

    Legacy Westbank Buick GMC

    4.5
    Harvey, LA (19 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4

    $79,437

    MSRP $91,150

    Est. $1,407/mo

    VanGuard GMC

    4.9
    $763 delivery from Sherman, TX (449 mi)
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  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $82,196

    $1K

    MSRP $94,285

    Est. $1,456/mo

    VanGuard GMC

    4.9
    $763 delivery from Sherman, TX (449 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

    $81,080

    MSRP $92,080

    Est. $1,436/mo

    Legacy GMC

    4.8
    Slidell, LA (45 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

    $84,635

    MSRP $95,635

    Est. $1,499/mo

    Legacy GMC

    4.8
    Slidell, LA (45 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

    $80,209

    Est. $1,421/mo

    Ross Downing GMC Cadillac

    4.6
    Hammond, LA (43 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

    $81,749

    $1K

    MSRP $91,775

    Est. $1,448/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 mi)
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  • Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4

    $82,374

    $1K

    MSRP $92,400

    Est. $1,459/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 mi)
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  • Titanium Rush Metallic 2026 GMC Sierra 2500 AT4Titanium Rush Metallic 2026 GMC Sierra 2500 AT4Titanium Rush Metallic 2026 GMC Sierra 2500 AT4Titanium Rush Metallic 2026 GMC Sierra 2500 AT4Titanium Rush Metallic 2026 GMC Sierra 2500 AT4Titanium Rush Metallic 2026 GMC Sierra 2500 AT4

    $70,344

    $1K

    MSRP $80,370

    Est. $1,246/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 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

    $79,164

    $1K

    MSRP $89,190

    Est. $1,402/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 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

    $83,329

    MSRP $93,355

    Est. $1,476/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 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

    $86,194

    $1K

    MSRP $96,220

    Est. $1,527/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 mi)
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  • Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4

    $82,374

    $1K

    MSRP $92,400

    Est. $1,459/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 mi)
    Check Availability
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  • Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4

    $79,534

    $1K

    MSRP $89,560

    Est. $1,409/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 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

    $82,374

    $1K

    MSRP $92,400

    Est. $1,459/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (40 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