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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

    $65,275

    Est. $1,191/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $66,623

    Est. $1,215/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $68,805

    Est. $1,255/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $69,176

    Est. $1,262/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $69,964

    Est. $1,276/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $63,990

    Est. $1,167/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $64,790

    Est. $1,182/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $67,789

    Est. $1,237/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $69,176

    Est. $1,262/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $65,921

    Est. $1,203/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $67,794

    Est. $1,237/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $69,728

    Est. $1,272/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $87,255

    Est. $1,592/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $67,933

    Est. $1,239/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $97,844

    Est. $1,785/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 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

    $69,728

    Est. $1,272/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (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

    $67,065

    Est. $1,223/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $65,570

    Est. $1,196/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $65,770

    Est. $1,200/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (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

    $67,065

    Est. $1,223/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $90,340

    Est. $1,648/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (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

    $68,805

    Est. $1,255/mo

    David Scott Lee Buick GMC

    4.7
    Check Availability
    Crestview, FL (19 mi)
    Quick view
  • 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

    $65,275

    Est. $1,191/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 mi)
    Quick view
  • 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

    $65,770

    Est. $1,200/mo

    McKenzie Buick GMC

    4.8
    Check Availability
    Milton, FL (26 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

    $62,644

    Est. $1,143/mo

    Laura Buick GMC

    4.5
    Check Availability
    $1,198 delivery from Collinsville, IL (599 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

    $63,082

    Est. $1,151/mo

    Laura Buick GMC

    4.5
    Check Availability
    $1,198 delivery from Collinsville, IL (599 mi)
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  • Volcanic Red 2026 GMC Sierra 1500 AT4Volcanic Red 2026 GMC Sierra 1500 AT4Volcanic Red 2026 GMC Sierra 1500 AT4Volcanic Red 2026 GMC Sierra 1500 AT4Volcanic Red 2026 GMC Sierra 1500 AT4Volcanic Red 2026 GMC Sierra 1500 AT4

    $67,075

    MSRP $75,900

    Est. $1,224/mo

    Step One Buick GMC Cadillac Pensacola

    3.9
    Check Availability
    Pensacola, FL (35 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

    $65,535

    MSRP $73,360

    Est. $1,196/mo

    Step One Buick GMC Cadillac Pensacola

    3.9
    Check Availability
    Pensacola, FL (35 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

    Not Priced

    Step One Buick GMC Cadillac Pensacola

    3.9
    Check Availability
    Pensacola, FL (35 mi)
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  • Sterling 2026 GMC Sierra 1500 AT4

    Not Priced

    Step One Buick GMC Cadillac Pensacola

    3.9
    Check Availability
    Pensacola, FL (35 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