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  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $79,857

    $1K
    Est. $1,493/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)

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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,409

    $1K
    Est. $1,578/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)

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  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,409

    $1K
    Est. $1,578/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $87,597

    $1K
    Est. $1,638/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Titanium Rush Metallic 2026 GMC Sierra 3500 AT4Titanium Rush Metallic 2026 GMC Sierra 3500 AT4Titanium Rush Metallic 2026 GMC Sierra 3500 AT4Titanium Rush Metallic 2026 GMC Sierra 3500 AT4Titanium Rush Metallic 2026 GMC Sierra 3500 AT4Titanium Rush Metallic 2026 GMC Sierra 3500 AT4

    $84,409

    $1K
    Est. $1,578/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4

    $76,590

    MSRP $82,590

    Est. $1,432/mo

    Suntrup Buick GMC

    3.9
    Check Availability
    Saint Peters, MO (21 mi)
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  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,276

    $1K
    Est. $1,576/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4

    $84,734

    $1K
    Est. $1,584/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)

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  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $79,995

    $1K
    Est. $1,496/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $92,359

    Est. $1,727/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,409

    $1K
    Est. $1,578/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $92,259

    Est. $1,725/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $84,144

    $1K
    Est. $1,573/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,495

    $1K
    Est. $1,580/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)

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  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,088

    $1K
    Est. $1,572/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $81,995

    $1K
    Est. $1,533/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,276

    $1K
    Est. $1,576/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $80,497

    $1K
    Est. $1,505/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,276

    $1K
    Est. $1,576/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
    Quick view
  • Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4Volcanic Red 2026 GMC Sierra 3500 AT4

    $92,176

    Est. $1,724/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)

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  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,088

    $1K
    Est. $1,572/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $87,409

    Est. $1,634/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,276

    $1K
    Est. $1,576/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (23 mi)
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  • Sterling Metallic 2026 GMC Sierra 3500 AT4

    $80,320

    MSRP $81,320

    Est. $1,502/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    $299 delivery from Naperville, IL (251 mi)
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  • White Sands 2026 GMC Sierra 3500 AT4White Sands 2026 GMC Sierra 3500 AT4

    $72,500

    MSRP $81,320

    Est. $1,356/mo

    Woody Buick GMC of Gurnee

    5.0
    Check Availability
    $441 delivery from Gurnee, IL (294 mi)
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About the 2026 GMC Sierra 3500 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 3500 AT4
FAQs

How much does the 2026 GMC Sierra 3500 AT4 cost?

The 2026 GMC Sierra 3500 AT4 price depends on optional features. Prices typically start at $73,400.

What are some similar vehicles and competitors of the 2026 GMC Sierra 3500 AT4?

The 2026 GMC Sierra 3500 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 $73,400 Starting at $73,600
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 3500 AT4 by city

GMC Sierra 3500 trims