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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

    $77,263

    MSRP $90,065

    Est. $1,426/mo

    McKinney Buick GMC

    4.1
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    McKinney, TX (15 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

    $77,758

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
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    McKinney, TX (15 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

    $81,267

    $500

    MSRP $93,485

    Est. $1,500/mo

    VanGuard GMC

    4.9
    Check Availability
    Sherman, TX (23 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

    $81,483

    MSRP $94,285

    Est. $1,504/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 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

    $77,908

    MSRP $90,710

    Est. $1,438/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 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

    $77,758

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 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

    $78,933

    MSRP $91,230

    Est. $1,457/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $77,758

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 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

    $79,073

    MSRP $91,380

    Est. $1,459/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $78,933

    MSRP $91,230

    Est. $1,457/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $79,073

    MSRP $91,380

    Est. $1,459/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $78,473

    MSRP $90,735

    Est. $1,448/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $79,073

    MSRP $91,380

    Est. $1,459/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $77,639

    Est. $1,433/mo

    Ewing Buick GMC

    4.6
    Check Availability
    Plano, TX (27 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

    $78,933

    MSRP $91,230

    Est. $1,457/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 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

    $78,933

    MSRP $91,230

    Est. $1,457/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
    Quick view
  • 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

    $78,473

    MSRP $90,735

    Est. $1,448/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
    Quick view
  • 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

    $78,199

    MSRP $90,440

    Est. $1,443/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
    Quick view
  • 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

    $124,995

    MSRP $91,230

    Est. $2,307/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
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  • Volcanic Red 2026 GMC Sierra 2500 AT4

    $78,284

    Est. $1,445/mo

    Ewing Buick GMC

    4.6
    Check Availability
    Plano, TX (27 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

    $78,326

    MSRP $90,609

    Est. $1,446/mo

    Freedom Buick GMC by Ed Morse

    2.6
    Check Availability
    Greenville, TX (30 mi)
    Quick view
  • 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

    $77,758

    $1.3K

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 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

    $77,758

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 mi)
    Quick view
  • 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

    $77,758

    MSRP $90,560

    Est. $1,435/mo

    McKinney Buick GMC

    4.1
    Check Availability
    McKinney, TX (15 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $81,625

    MSRP $90,125

    Est. $1,506/mo

    James Wood Motors, Inc

    4.8
    Check Availability
    $399 delivery from Decatur, TX (62 mi)
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  • Dune 2026 GMC Sierra 2500 AT4

    $78,134

    Est. $1,442/mo

    Ewing Buick GMC

    4.6
    Check Availability
    Plano, TX (27 mi)

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  • Summit White 2026 GMC Sierra 2500 AT4

    $81,625

    MSRP $90,125

    Est. $1,506/mo

    James Wood Motors, Inc

    4.8
    Check Availability
    $399 delivery from Decatur, TX (62 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