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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

    $66,765

    $9.3K

    MSRP $76,100

    Est. $1,252/mo

    Legacy Westbank Buick GMC

    4.5
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    Harvey, LA (19 mi)

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  • TAN 2026 GMC Sierra 1500 AT4

    $64,520

    MSRP $73,855

    Est. $1,210/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $65,650

    $6.2K

    MSRP $74,150

    Est. $1,231/mo

    Crown Buick GMC

    4.7
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    Metairie, LA (15 mi)
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  • SILVER 2026 GMC Sierra 1500 AT4SILVER 2026 GMC Sierra 1500 AT4SILVER 2026 GMC Sierra 1500 AT4SILVER 2026 GMC Sierra 1500 AT4SILVER 2026 GMC Sierra 1500 AT4SILVER 2026 GMC Sierra 1500 AT4

    $67,955

    MSRP $78,290

    Est. $1,274/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $63,500

    $495
    4,883 mi.
    Est. $1,191/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $63,996

    $429
    2,112 mi.
    Est. $1,200/mo

    Geaux Chevrolet

    4.8
    Check Availability
    LaPlace, LA (16 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

    $63,655

    $3K

    MSRP $73,155

    Est. $1,194/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4

    $64,920

    MSRP $75,255

    Est. $1,218/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $67,460

    MSRP $77,795

    Est. $1,265/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $65,255

    $6.2K

    MSRP $74,755

    Est. $1,224/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $63,100

    $200
    6,460 mi.
    Est. $1,183/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $67,090

    $6.2K

    MSRP $76,590

    Est. $1,258/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $68,545

    $4.2K

    MSRP $76,045

    Est. $1,285/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4

    $65,315

    MSRP $75,650

    Est. $1,225/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $72,500

    MSRP $75,750

    Est. $1,360/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $68,545

    $4.2K

    MSRP $76,045

    Est. $1,285/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $65,250

    $7.2K

    MSRP $75,750

    Est. $1,224/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $67,955

    MSRP $78,290

    Est. $1,274/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (19 mi)
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  • Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4Coastal Dune 2026 GMC Sierra 1500 AT4

    $74,150

    MSRP $74,150

    Est. $1,391/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (19 mi)
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  • Coastal Dune 2026 GMC Sierra 1500 AT4

    $67,955

    MSRP $78,290

    Est. $1,274/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (19 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

    $67,974

    MSRP $75,750

    Est. $1,275/mo

    Mossy GMC

    4.7
    Check Availability
    New Orleans, LA (19 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

    $66,979

    MSRP $74,755

    Est. $1,256/mo

    Mossy GMC

    4.7
    Check Availability
    New Orleans, LA (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

    $66,979

    MSRP $74,755

    Est. $1,256/mo

    Mossy GMC

    4.7
    Check Availability
    New Orleans, LA (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

    $72,079

    MSRP $73,855

    Est. $1,352/mo

    Mossy GMC

    4.7
    Check Availability
    New Orleans, LA (19 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

    $62,995

    1,975 mi.
    Est. $1,181/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4

    $73,855

    MSRP $73,855

    Est. $1,385/mo

    Legacy Westbank Buick GMC

    4.5
    Check Availability
    Harvey, LA (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

    $72,855

    $1.1K

    MSRP $77,265

    Est. $1,366/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $65,255

    $6.2K

    MSRP $74,755

    Est. $1,224/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $65,650

    $6.2K

    MSRP $74,150

    Est. $1,231/mo

    Crown Buick GMC

    4.7
    Check Availability
    Metairie, LA (15 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

    $62,506

    MSRP $73,630

    Est. $1,172/mo

    VanGuard GMC

    4.9
    Check Availability
    $763 delivery from Sherman, TX (449 mi)
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  • Coastal Dune 2026 GMC Sierra 1500 AT4

    $64,437

    $3.2K

    MSRP $75,800

    Est. $1,208/mo

    VanGuard GMC

    4.9
    Check Availability
    $763 delivery from Sherman, TX (449 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 4.4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2026 Sierra 1500 owners.

Ratings (5 reviews)

80% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.2
Interior
4.2
Performance
4.4
Value
3.4
Exterior
4.4
Reliability
4.4
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