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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

    $87,451

    MSRP $91,095

    Est. $1,556/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $84,385

    MSRP $90,300

    Est. $1,502/mo

    Reynolds GMC

    4.7
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    West Covina, CA (28 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

    $87,095

    MSRP $88,095

    Est. $1,550/mo

    Simpson Buick GMC of Buena Park

    4.9
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    Buena Park, CA (16 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

    $82,191

    MSRP $91,705

    Est. $1,463/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $86,141

    MSRP $91,555

    Est. $1,533/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $81,100

    MSRP $87,600

    Est. $1,443/mo

    Simpson Buick GMC of Buena Park

    4.9
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    Buena Park, CA (16 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

    $110,544

    MSRP $91,554

    Est. $1,967/mo

    Simpson Buick GMC of Buena Park

    4.9
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    Buena Park, CA (16 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

    $86,815

    MSRP $91,730

    Est. $1,545/mo

    Reynolds GMC

    4.7
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    West Covina, CA (28 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

    $87,595

    MSRP $88,595

    Est. $1,559/mo

    Simpson Buick GMC of Buena Park

    4.9
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    Buena Park, CA (16 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

    $85,612

    MSRP $93,080

    Est. $1,524/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $90,529

    MSRP $91,529

    Est. $1,611/mo

    Simpson Buick GMC of Buena Park

    4.9
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    Buena Park, CA (16 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

    $90,640

    MSRP $91,555

    Est. $1,613/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $82,041

    MSRP $91,555

    Est. $1,460/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $86,590

    MSRP $90,505

    Est. $1,541/mo

    Reynolds GMC

    4.7
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    West Covina, CA (28 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

    $80,596

    MSRP $90,110

    Est. $1,434/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $82,041

    MSRP $91,555

    Est. $1,460/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $90,145

    MSRP $91,060

    Est. $1,604/mo

    Hardin Buick GMC

    4.6
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    Anaheim, CA (23 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

    $81,251

    MSRP $86,580

    Est. $1,446/mo

    Costa Mesa GMC

    1.4
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    Costa Mesa, CA (23 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

    $84,700

    MSRP $90,210

    Est. $1,507/mo

    Costa Mesa GMC

    1.4
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    Costa Mesa, CA (23 mi)
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  • Summit White 2026 GMC Sierra 2500 AT4

    $89,690

    MSRP $90,605

    Est. $1,596/mo

    Reynolds GMC

    4.7
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    West Covina, CA (28 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

    $81,562

    MSRP $90,625

    Est. $1,451/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $81,562

    MSRP $90,625

    Est. $1,451/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $82,350

    MSRP $91,500

    Est. $1,466/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $91,500

    MSRP $91,500

    Est. $1,628/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $80,890

    MSRP $80,890

    Est. $1,440/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 mi)
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  • Sterling Metallic 2026 GMC Sierra 2500 AT4

    $90,585

    MSRP $91,500

    Est. $1,612/mo

    Reynolds GMC

    4.7
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    West Covina, CA (28 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

    $90,725

    MSRP $90,725

    Est. $1,615/mo

    Tustin Buick GMC

    3.1
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    Tustin, CA (28 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

    $90,818

    7,485 mi.
    Est. $1,616/mo

    Shottenkirk Toyota of Granbury

    4.4
    Check Availability
    $1,787 delivery from Granbury, TX (1192 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