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  • White 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4X

    $76,449

    $8.2K

    MSRP $86,380

    Est. $1,373/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)

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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $80,130

    Est. $1,439/mo

    O'Meara GMC

    3.1
    Check Availability
    Thornton, CO (24 mi)

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  • Coastal Dune 2026 GMC Sierra 1500 AT4XCoastal Dune 2026 GMC Sierra 1500 AT4XCoastal Dune 2026 GMC Sierra 1500 AT4XCoastal Dune 2026 GMC Sierra 1500 AT4XCoastal Dune 2026 GMC Sierra 1500 AT4XCoastal Dune 2026 GMC Sierra 1500 AT4X

    $81,325

    $5.2K
    Est. $1,460/mo

    Transwest GMC Denver

    4.8
    Check Availability
    Henderson, CO (28 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 1500 AT4XVolcanic Red Tintcoat 2026 GMC Sierra 1500 AT4XVolcanic Red Tintcoat 2026 GMC Sierra 1500 AT4XVolcanic Red Tintcoat 2026 GMC Sierra 1500 AT4XVolcanic Red Tintcoat 2026 GMC Sierra 1500 AT4XVolcanic Red Tintcoat 2026 GMC Sierra 1500 AT4X

    $75,280

    $8.6K

    MSRP $86,130

    Est. $1,352/mo

    Loveland Buick GMC

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    Loveland, CO (20 mi)
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  • Tan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4X

    $75,824

    $4.5K

    MSRP $85,780

    Est. $1,362/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $72,471

    $4.2K

    MSRP $85,285

    Est. $1,301/mo

    Mike Maroone Cadillac GMC

    4.5
    Check Availability
    Boulder, CO (13 mi)
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  • Volcanic Red 2026 GMC Sierra 1500 AT4XVolcanic Red 2026 GMC Sierra 1500 AT4XVolcanic Red 2026 GMC Sierra 1500 AT4XVolcanic Red 2026 GMC Sierra 1500 AT4XVolcanic Red 2026 GMC Sierra 1500 AT4XVolcanic Red 2026 GMC Sierra 1500 AT4X

    $73,381

    $6.2K

    MSRP $86,130

    Est. $1,318/mo

    Mike Maroone Cadillac GMC

    4.5
    Check Availability
    Boulder, CO (13 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $77,740

    Est. $1,396/mo

    O'Meara GMC

    3.1
    Check Availability
    Thornton, CO (24 mi)

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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $74,491

    $5.1K

    MSRP $86,380

    Est. $1,338/mo

    Mike Maroone Cadillac GMC

    4.5
    Check Availability
    Boulder, CO (13 mi)
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  • Dune 2026 GMC Sierra 1500 AT4XDune 2026 GMC Sierra 1500 AT4XDune 2026 GMC Sierra 1500 AT4XDune 2026 GMC Sierra 1500 AT4XDune 2026 GMC Sierra 1500 AT4XDune 2026 GMC Sierra 1500 AT4X

    $78,586

    $1K

    MSRP $86,875

    Est. $1,411/mo

    Mike Maroone Cadillac GMC

    4.5
    Check Availability
    Boulder, CO (13 mi)
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  • Gray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4X

    $76,904

    $8.3K

    MSRP $86,875

    Est. $1,381/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Red 2026 GMC Sierra 1500 AT4XRed 2026 GMC Sierra 1500 AT4XRed 2026 GMC Sierra 1500 AT4XRed 2026 GMC Sierra 1500 AT4XRed 2026 GMC Sierra 1500 AT4XRed 2026 GMC Sierra 1500 AT4X

    $76,874

    $2.9K

    MSRP $87,025

    Est. $1,381/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Gray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4X

    $76,749

    $4.3K

    MSRP $86,875

    Est. $1,378/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4X

    $78,135

    Est. $1,403/mo

    O'Meara GMC

    3.1
    Check Availability
    Thornton, CO (24 mi)

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  • Black 2026 GMC Sierra 1500 AT4XBlack 2026 GMC Sierra 1500 AT4XBlack 2026 GMC Sierra 1500 AT4XBlack 2026 GMC Sierra 1500 AT4XBlack 2026 GMC Sierra 1500 AT4XBlack 2026 GMC Sierra 1500 AT4X

    $76,949

    $4.1K

    MSRP $86,875

    Est. $1,382/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Gray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4XGray 2026 GMC Sierra 1500 AT4X

    $74,424

    $9.2K

    MSRP $83,685

    Est. $1,337/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • White 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4XWhite 2026 GMC Sierra 1500 AT4X

    $76,229

    $4.3K

    MSRP $86,380

    Est. $1,369/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Tan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4X

    $76,899

    $4.2K

    MSRP $86,875

    Est. $1,381/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Tan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4XTan 2026 GMC Sierra 1500 AT4X

    $76,237

    $8K

    MSRP $85,980

    Est. $1,369/mo

    Weld County Garage GMC Hummer

    4.5
    Check Availability
    Greeley, CO (27 mi)
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  • Sterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4X

    $76,240

    Est. $1,369/mo

    O'Meara GMC

    3.1
    Check Availability
    Thornton, CO (24 mi)

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  • Onyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4X

    $85,680

    MSRP $85,680

    Est. $1,539/mo

    Markley Buick GMC

    4.9
    Check Availability
    Fort Collins, CO (25 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $76,672

    $1.2K

    MSRP $84,485

    Est. $1,377/mo

    Mike Maroone Chevrolet GMC

    4.1
    Check Availability
    Longmont, CO (9 mi)
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  • Sterling 2026 GMC Sierra 1500 AT4XSterling 2026 GMC Sierra 1500 AT4XSterling 2026 GMC Sierra 1500 AT4XSterling 2026 GMC Sierra 1500 AT4XSterling 2026 GMC Sierra 1500 AT4XSterling 2026 GMC Sierra 1500 AT4X

    $78,680

    $4K

    MSRP $84,980

    Est. $1,413/mo

    Mike Maroone Cadillac GMC

    4.5
    Check Availability
    Boulder, CO (13 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4X

    $83,730

    MSRP $85,980

    Est. $1,504/mo

    Loveland Buick GMC

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    Loveland, CO (20 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $69,990

    $2K
    12,283 mi.
    Est. $1,257/mo

    O'Meara Ford

    4.3
    Check Availability
    Northglenn, CO (25 mi)
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  • Onyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4XOnyx Black 2026 GMC Sierra 1500 AT4X

    $78,135

    Est. $1,403/mo

    O'Meara GMC

    3.1
    Check Availability
    Thornton, CO (24 mi)

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  • Sterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4XSterling Metallic 2026 GMC Sierra 1500 AT4X

    $83,730

    MSRP $85,980

    Est. $1,504/mo

    Loveland Buick GMC

    Check Availability
    Loveland, CO (20 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4XSummit White 2026 GMC Sierra 1500 AT4X

    $76,340

    $7.2K

    MSRP $83,590

    Est. $1,371/mo

    Young GMC Burley

    Check Availability
    Free delivery from Burley, ID (475 mi)
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  • Summit White 2026 GMC Sierra 1500 AT4X

    $74,540

    $1K

    MSRP $84,290

    Est. $1,339/mo

    James Wood Motors, Inc

    4.8
    Check Availability
    $960 delivery from Decatur, TX (640 mi)
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About the 2026 GMC Sierra 1500 AT4X

Basics

AT4X shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
19
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 AT4X
FAQs

How much does the 2026 GMC Sierra 1500 AT4X cost?

The 2026 GMC Sierra 1500 AT4X price depends on optional features. Prices typically start at $79,600.

What is the MPG of the 2026 GMC Sierra 1500 AT4X?

The 2026 GMC Sierra 1500 AT4X offers up to 19 MPG in city driving and 20 MPG on the highway for a combined rating of 19 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 AT4X?

The 2026 GMC Sierra 1500 AT4X compares to and/or competes against the following vehicles:


Is the 2026 GMC Sierra 1500 AT4X 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

AT4X (1 style)

Style
4WD Crew Cab 147" AT4X
Inventory price
Starting at $79,600
Combined MPG
19
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)
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2026 GMC Sierra 1500 AT4X by city

GMC Sierra 1500 trims