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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

    $78,999

    2,901 mi.
    Est. $1,431/mo

    Joe Myers Toyota

    4.8
    Check Availability
    Houston, TX (18 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

    $94,990

    8,330 mi.
    Est. $1,721/mo

    Lifted Trucks - Katy

    Check Availability
    Katy, TX (29 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

    $90,840

    MSRP $91,615

    Est. $1,646/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $83,785

    $9.5K

    MSRP $94,285

    Est. $1,518/mo

    Demontrond Buick GMC

    4.8
    Check Availability
    Houston, TX (20 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

    $81,689

    MSRP $92,189

    Est. $1,480/mo

    Classic Buick GMC

    4.7
    Check Availability
    Houston, TX (26 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

    $80,789

    MSRP $91,289

    Est. $1,463/mo

    Classic Buick GMC

    4.7
    Check Availability
    Houston, TX (26 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

    $80,185

    $9.5K

    MSRP $90,685

    Est. $1,453/mo

    Demontrond Buick GMC

    4.8
    Check Availability
    Houston, TX (20 mi)
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  • Onyx Black 2026 GMC Sierra 2500 AT4

    $82,380

    $9.5K

    MSRP $91,880

    Est. $1,492/mo

    Demontrond Buick GMC

    4.8
    Check Availability
    Houston, TX (20 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

    $74,525

    MSRP $79,025

    Est. $1,350/mo

    Classic Buick GMC

    4.7
    Check Availability
    Houston, TX (26 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

    $92,595

    MSRP $92,595

    Est. $1,677/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $89,920

    MSRP $90,695

    Est. $1,629/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $80,230

    MSRP $80,230

    Est. $1,453/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $89,920

    MSRP $90,695

    Est. $1,629/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4

    $80,335

    $10K

    MSRP $90,835

    Est. $1,455/mo

    Demontrond Buick GMC

    4.8
    Check Availability
    Houston, TX (20 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

    $83,261

    MSRP $89,400

    Est. $1,508/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $81,115

    $9.5K

    MSRP $91,615

    Est. $1,469/mo

    Demontrond Buick GMC

    4.8
    Check Availability
    Houston, TX (20 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

    $90,345

    MSRP $91,120

    Est. $1,637/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $74,525

    MSRP $79,025

    Est. $1,350/mo

    Classic Buick GMC

    4.7
    Check Availability
    Houston, TX (26 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

    $86,569

    MSRP $81,069

    Est. $1,568/mo

    Classic Buick GMC

    4.7
    Check Availability
    Houston, TX (26 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

    $84,404

    MSRP $90,615

    Est. $1,529/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $91,655

    MSRP $91,655

    Est. $1,660/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $91,655

    MSRP $91,655

    Est. $1,660/mo

    Group 1 Buick GMC North

    4.4
    Check Availability
    Houston, TX (17 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

    $90,780

    MSRP $91,555

    Est. $1,644/mo

    Group 1 Buick GMC South

    4.6
    Check Availability
    Free delivery from Houston, TX (47 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

    $92,129

    MSRP $92,904

    Est. $1,669/mo

    Group 1 Buick GMC South

    4.6
    Check Availability
    Free delivery from Houston, TX (47 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