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  • Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4

    $70,994

    MSRP $72,795

    Est. $1,283/mo

    MIRACLE BUICK GMC OF KUTZTOWN

    2.6
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    Fleetwood, PA (20 mi)

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  • Tan 2026 GMC Sierra 1500 AT4Tan 2026 GMC Sierra 1500 AT4Tan 2026 GMC Sierra 1500 AT4Tan 2026 GMC Sierra 1500 AT4Tan 2026 GMC Sierra 1500 AT4Tan 2026 GMC Sierra 1500 AT4

    $68,785

    Est. $1,243/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4

    $69,602

    MSRP $78,359

    Est. $1,258/mo

    Patriot Buick GMC

    4.7
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    Boyertown, PA (5 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4Summit White 2026 GMC Sierra 1500 AT4Summit White 2026 GMC Sierra 1500 AT4Summit White 2026 GMC Sierra 1500 AT4Summit White 2026 GMC Sierra 1500 AT4Summit White 2026 GMC Sierra 1500 AT4

    $100,817

    MSRP $104,667

    Est. $1,822/mo

    Kelly Buick GMC

    4.6
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    Emmaus, PA (22 mi)
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  • Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4

    $102,602

    Est. $1,854/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4

    $102,602

    Est. $1,854/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4Onyx Black 2026 GMC Sierra 1500 AT4Onyx Black 2026 GMC Sierra 1500 AT4Onyx Black 2026 GMC Sierra 1500 AT4Onyx Black 2026 GMC Sierra 1500 AT4Onyx Black 2026 GMC Sierra 1500 AT4

    $72,180

    MSRP $75,180

    Est. $1,304/mo

    Hill Buick GMC

    5.0
    Check Availability
    Newtown Square, PA (22 mi)
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  • Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4

    $75,180

    Est. $1,359/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (5 mi)
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  • White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4

    $67,395

    Est. $1,218/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • White 2026 GMC Sierra 1500 AT4

    $67,790

    $7.7K
    Est. $1,225/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • Black 2026 GMC Sierra 1500 AT4

    $68,285

    Est. $1,234/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4White 2026 GMC Sierra 1500 AT4

    $68,390

    Est. $1,236/mo

    Star GMC of Quakertown

    4.2
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    Quakertown, PA (19 mi)
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  • Dune 2026 GMC Sierra 1500 AT4Dune 2026 GMC Sierra 1500 AT4Dune 2026 GMC Sierra 1500 AT4Dune 2026 GMC Sierra 1500 AT4Dune 2026 GMC Sierra 1500 AT4Dune 2026 GMC Sierra 1500 AT4

    $66,698

    Est. $1,205/mo

    Bergey's Buick GMC

    4.6
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    Souderton, PA (15 mi)
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  • Red 2026 GMC Sierra 1500 AT4Red 2026 GMC Sierra 1500 AT4Red 2026 GMC Sierra 1500 AT4Red 2026 GMC Sierra 1500 AT4Red 2026 GMC Sierra 1500 AT4Red 2026 GMC Sierra 1500 AT4

    $68,050

    MSRP $76,695

    Est. $1,230/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (5 mi)
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  • Gray 2026 GMC Sierra 1500 AT4

    $68,285

    $5.7K
    Est. $1,234/mo

    Star GMC of Quakertown

    4.2
    Check Availability
    Quakertown, PA (19 mi)
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  • Gray 2026 GMC Sierra 1500 AT4

    $68,285

    Est. $1,234/mo

    Star GMC of Quakertown

    4.2
    Check Availability
    Quakertown, PA (19 mi)
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  • Red 2026 GMC Sierra 1500 AT4

    $69,035

    Est. $1,248/mo

    Star GMC of Quakertown

    4.2
    Check Availability
    Quakertown, PA (19 mi)
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  • Sterling 2026 GMC Sierra 1500 AT4Sterling 2026 GMC Sierra 1500 AT4Sterling 2026 GMC Sierra 1500 AT4Sterling 2026 GMC Sierra 1500 AT4Sterling 2026 GMC Sierra 1500 AT4Sterling 2026 GMC Sierra 1500 AT4

    $68,485

    $5.7K
    Est. $1,238/mo

    Bergey's Buick GMC

    4.6
    Check Availability
    Souderton, PA (15 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4

    $73,360

    MSRP $73,360

    Est. $1,326/mo

    Granite Run Buick GMC

    4.1
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    Media, PA (26 mi)
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  • Black 2026 GMC Sierra 1500 AT4

    $67,910

    MSRP $76,545

    Est. $1,227/mo

    Patriot Buick GMC

    4.7
    Check Availability
    Boyertown, PA (5 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4

    $73,360

    MSRP $73,360

    Est. $1,326/mo

    Granite Run Buick GMC

    4.1
    Check Availability
    Media, PA (26 mi)
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  • Dune 2026 GMC Sierra 1500 AT4

    $77,860

    MSRP $77,860

    Est. $1,407/mo

    Granite Run Buick GMC

    4.1
    Check Availability
    Media, PA (26 mi)
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  • Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4Black 2026 GMC Sierra 1500 AT4

    $71,647

    MSRP $77,335

    Est. $1,295/mo

    #1 Cochran Buick GMC Monroeville

    4.8
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    $750 delivery from Monroeville, PA (218 mi)
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  • Gray 2026 GMC Sierra 1500 AT4Gray 2026 GMC Sierra 1500 AT4Gray 2026 GMC Sierra 1500 AT4Gray 2026 GMC Sierra 1500 AT4Gray 2026 GMC Sierra 1500 AT4Gray 2026 GMC Sierra 1500 AT4

    $71,647

    MSRP $77,335

    Est. $1,295/mo

    #1 Cochran Buick GMC Monroeville

    4.8
    Check Availability
    $750 delivery from Monroeville, PA (218 mi)
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About the 2026 GMC Sierra 1500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
23
Transmission
10-Speed A/T
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2026 GMC Sierra 1500 AT4
FAQs

How much does the 2026 GMC Sierra 1500 AT4 cost?

The 2026 GMC Sierra 1500 AT4 price depends on optional features. Prices typically start at $67,000.

What is the MPG of the 2026 GMC Sierra 1500 AT4?

The 2026 GMC Sierra 1500 AT4 offers up to 21 MPG in city driving and 24 MPG on the highway for a combined rating of 23 MPG.

These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.

What are some similar vehicles and competitors of the 2026 GMC Sierra 1500 AT4?

The 2026 GMC Sierra 1500 AT4 compares to and/or competes against the following vehicles:


Is the 2026 GMC Sierra 1500 AT4 reliable?

The 2026 GMC Sierra 1500 has an average reliability rating of 4.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2026 Sierra 1500 owners.

Ratings (4 reviews)

75% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.0
Interior
4.0
Performance
4.2
Value
3.5
Exterior
4.2
Reliability
4.5
Trims

AT4 (2 styles)

Style
4WD Crew Cab 147" AT4 4WD Crew Cab 157" AT4
Inventory price
Starting at $67,000 Starting at $67,500
Combined MPG
23 23
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
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2026 GMC Sierra 1500 AT4 by city

GMC Sierra 1500 trims