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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

    $89,195

    Est. $1,523/mo

    Bergey's Buick GMC

    4.6
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    Souderton, PA (6 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

    $79,402

    MSRP $83,495

    Est. $1,355/mo

    Patriot Buick GMC

    4.7
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    Boyertown, PA (10 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

    $87,655

    Est. $1,496/mo

    Bergey's Buick GMC

    4.6
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    Souderton, PA (6 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

    $89,385

    MSRP $89,895

    Est. $1,526/mo

    Kelly Buick GMC

    4.5
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    Emmaus, PA (19 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

    $89,100

    Est. $1,521/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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 AT4

    $90,650

    Est. $1,548/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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

    $87,905

    Est. $1,501/mo

    Bergey's Buick GMC

    4.6
    Check Availability
    Souderton, PA (6 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

    $80,590

    MSRP $81,100

    Est. $1,376/mo

    MIRACLE BUICK GMC OF KUTZTOWN

    2.7
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    Fleetwood, PA (25 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

    $79,340

    Est. $1,354/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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

    $88,885

    Est. $1,517/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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

    $90,950

    Est. $1,553/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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

    $88,460

    Est. $1,510/mo

    Star GMC of Quakertown

    4.3
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    Quakertown, PA (14 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

    $86,655

    MSRP $90,165

    Est. $1,479/mo

    Hill Buick GMC

    5.0
    Check Availability
    Newtown Square, PA (21 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $89,860

    MSRP $90,860

    Est. $1,534/mo

    Kelly Buick GMC

    4.5
    Check Availability
    Emmaus, PA (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

    $87,465

    MSRP $87,975

    Est. $1,493/mo

    MIRACLE BUICK GMC OF KUTZTOWN

    2.7
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    Fleetwood, PA (25 mi)
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  • Tan 2026 GMC Sierra 2500 AT4

    $87,456

    MSRP $92,100

    Est. $1,493/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (10 mi)
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  • Black 2026 GMC Sierra 2500 AT4

    $81,600

    $510

    MSRP $82,110

    Est. $1,393/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (10 mi)
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  • White 2026 GMC Sierra 2500 AT4

    $86,994

    $4.6K

    MSRP $91,605

    Est. $1,485/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (10 mi)
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  • Gray 2026 GMC Sierra 2500 AT4

    $80,660

    Est. $1,377/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (10 mi)
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  • $89,605

    MSRP $89,605

    Est. $1,530/mo

    Granite Run Buick GMC

    3.7
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    Media, PA (26 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

    $93,275

    Est. $1,592/mo

    Laura Buick GMC

    4.5
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    $1,565 delivery from Collinsville, IL (783 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

    $74,246

    Est. $1,267/mo

    Laura Buick GMC

    4.5
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    $1,565 delivery from Collinsville, IL (783 mi)
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  • Silver 2026 GMC Sierra 2500 AT4Silver 2026 GMC Sierra 2500 AT4Silver 2026 GMC Sierra 2500 AT4Silver 2026 GMC Sierra 2500 AT4Silver 2026 GMC Sierra 2500 AT4Silver 2026 GMC Sierra 2500 AT4

    $88,916

    4,837 mi.
    Est. $1,518/mo

    Star GMC of Easton

    4.5
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    Easton, PA (31 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

    $81,564

    MSRP $88,265

    Est. $1,392/mo

    i.g. Burton Buick GMC of Elkton

    Check Availability
    Elkton, MD (50 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

    $84,705

    $490
    Est. $1,446/mo

    Peruzzi Buick GMC

    4.6
    Check Availability
    Fairless Hills, PA (33 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

    $72,887

    Est. $1,244/mo

    T&T Coast GMC

    Check Availability
    Cranbury, NJ (50 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 AT4

    $86,241

    MSRP $90,455

    Est. $1,472/mo

    Burns Buick GMC

    4.8
    Check Availability
    MARLTON, NJ (39 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

    $78,700

    Est. $1,344/mo

    Pellegrino Buick GMC

    4.7
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    Williamstown, NJ (48 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

    $84,804

    $1K

    MSRP $90,804

    Est. $1,448/mo

    Pointe GMC

    4.1
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    Penns Grove, NJ (38 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

    $85,350

    $490
    Est. $1,457/mo

    Peruzzi Buick GMC

    4.6
    Check Availability
    Fairless Hills, PA (33 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

    $87,385

    Est. $1,492/mo

    Star GMC of Easton

    4.5
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    Easton, PA (31 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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Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed

2026 GMC Sierra 2500 AT4 by city

GMC Sierra 2500 trims