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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

    $71,500

    Est. $1,310/mo

    Kelley Buick GMC of Bartow

    4.1
    Check Availability
    Bartow, FL (29 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

    $66,562

    MSRP $73,659

    Est. $1,220/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $65,592

    $4.7K
    Est. $1,202/mo

    Regal Automotive Group

    4.6
    Check Availability
    Lakeland, FL (23 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

    $67,005

    MSRP $74,154

    Est. $1,228/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $72,799

    $1K

    MSRP $76,049

    Est. $1,334/mo

    Tasca Buick GMC Clearwater

    4.8
    Check Availability
    Clearwater, FL (27 mi)
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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

    $72,799

    $1K

    MSRP $76,049

    Est. $1,334/mo

    Tasca Buick GMC Clearwater

    4.8
    Check Availability
    Clearwater, FL (27 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

    $68,219

    $1K

    MSRP $75,230

    Est. $1,250/mo

    Ferman Buick GMC

    4.8
    Check Availability
    Lutz, FL (16 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

    $65,910

    MSRP $74,160

    Est. $1,208/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $71,309

    $1K

    MSRP $74,559

    Est. $1,307/mo

    Tasca Buick GMC Clearwater

    4.8
    Check Availability
    Clearwater, FL (27 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

    $63,526

    $4.6K
    Est. $1,164/mo

    Regal Automotive Group

    4.6
    Check Availability
    Lakeland, FL (23 mi)
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  • Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4

    $70,254

    $1K

    MSRP $77,373

    Est. $1,288/mo

    Ferman Buick GMC

    4.8
    Check Availability
    Lutz, FL (16 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

    $65,274

    $3.7K

    MSRP $76,024

    Est. $1,196/mo

    Tasca Buick GMC Palm Harbor

    4.7
    Check Availability
    Palm Harbor, FL (27 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4

    $67,139

    MSRP $74,304

    Est. $1,230/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
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  • Dune 2026 GMC Sierra 1500 AT4

    $70,289

    Est. $1,288/mo

    Kelley Buick GMC of Bartow

    4.1
    Check Availability
    Bartow, FL (29 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

    $66,535

    MSRP $73,659

    Est. $1,219/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $68,701

    MSRP $76,049

    Est. $1,259/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $67,005

    MSRP $74,154

    Est. $1,228/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
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  • Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4

    $68,701

    MSRP $76,049

    Est. $1,259/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $66,816

    MSRP $75,155

    Est. $1,225/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
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  • Dune 2026 GMC Sierra 1500 AT4

    $68,817

    Est. $1,261/mo

    Kelley Buick GMC of Bartow

    4.1
    Check Availability
    Bartow, FL (29 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

    $66,562

    MSRP $73,659

    Est. $1,220/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
    Quick view
  • 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

    $73,259

    MSRP $73,259

    Est. $1,343/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4

    $67,139

    MSRP $74,304

    Est. $1,230/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 mi)
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  • Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4Sterling Metallic 2026 GMC Sierra 1500 AT4

    $67,247

    $732

    MSRP $73,155

    Est. $1,232/mo

    Ferman Buick GMC

    4.8
    Check Availability
    Lutz, FL (16 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

    $68,258

    MSRP $75,554

    Est. $1,251/mo

    Rivard Buick GMC

    4.8
    Check Availability
    Tampa, FL (4 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

    $62,467

    $1K
    Est. $1,145/mo

    Laura Buick GMC

    4.6
    Check Availability
    $1,726 delivery from Collinsville, IL (863 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

    $62,998

    $1K
    5,010 mi.
    Est. $1,155/mo

    CarMax Tuscaloosa

    Check Availability
    $399 delivery to Tampa, FL (12 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