Skip to main content
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed
Skip to Filters
  • 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

    $66,492

    $738

    MSRP $73,880

    Est. $1,165/mo

    Tustin Buick GMC

    3.1
    Check Availability
    Tustin, CA (13 mi)

    Quick view
  • 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

    $73,779

    MSRP $76,944

    Est. $1,292/mo

    Reynolds GMC

    4.7
    Check Availability
    West Covina, CA (20 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

    $71,310

    MSRP $74,560

    Est. $1,249/mo

    Simpson Buick GMC of Buena Park

    4.9
    Check Availability
    Buena Park, CA (5 mi)
    Quick view
  • 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

    $66,811

    $600

    MSRP $75,875

    Est. $1,170/mo

    Hardin Buick GMC

    4.6
    Check Availability
    Anaheim, CA (7 mi)
    Quick view
  • 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

    $66,805

    MSRP $75,055

    Est. $1,170/mo

    Laguna Niguel GMC

    Check Availability
    Laguna Niguel, CA (26 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

    $66,110

    MSRP $73,360

    Est. $1,158/mo

    Laguna Niguel GMC

    Check Availability
    Laguna Niguel, CA (26 mi)
    Quick view
  • 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

    $69,600

    MSRP $75,350

    Est. $1,219/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $71,590

    MSRP $73,755

    Est. $1,254/mo

    Reynolds GMC

    4.7
    Check Availability
    West Covina, CA (20 mi)

    Quick view
  • 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

    $64,980

    MSRP $73,230

    Est. $1,138/mo

    Laguna Niguel GMC

    Check Availability
    Laguna Niguel, CA (26 mi)
    Quick view
  • 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

    $71,805

    MSRP $75,055

    Est. $1,258/mo

    Simpson Buick GMC of Buena Park

    4.9
    Check Availability
    Buena Park, CA (5 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

    $71,605

    MSRP $74,855

    Est. $1,254/mo

    Simpson Buick GMC of Buena Park

    4.9
    Check Availability
    Buena Park, CA (5 mi)
    Quick view
  • 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

    $74,265

    MSRP $77,515

    Est. $1,301/mo

    Simpson Buick GMC of Buena Park

    4.9
    Check Availability
    Buena Park, CA (5 mi)
    Quick view
  • 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

    $68,197

    MSRP $75,775

    Est. $1,194/mo

    Tustin Buick GMC

    3.1
    Check Availability
    Tustin, CA (13 mi)
    Quick view
  • 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

    $69,600

    MSRP $75,350

    Est. $1,219/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 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

    $66,046

    MSRP $73,385

    Est. $1,157/mo

    Tustin Buick GMC

    3.1
    Check Availability
    Tustin, CA (13 mi)
    Quick view
  • 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

    $75,136

    MSRP $76,670

    Est. $1,316/mo

    Tustin Buick GMC

    3.1
    Check Availability
    Tustin, CA (13 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

    $69,105

    MSRP $74,855

    Est. $1,210/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $71,320

    MSRP $77,070

    Est. $1,249/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $69,600

    MSRP $75,350

    Est. $1,219/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 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

    $71,095

    MSRP $73,260

    Est. $1,245/mo

    Reynolds GMC

    4.7
    Check Availability
    West Covina, CA (20 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

    $70,825

    MSRP $76,575

    Est. $1,240/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 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

    $69,105

    MSRP $74,855

    Est. $1,210/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $71,320

    MSRP $77,070

    Est. $1,249/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $71,320

    MSRP $77,070

    Est. $1,249/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Check Availability
    Ontario, CA (29 mi)
    Quick view
  • 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

    $65,290

    MSRP $74,755

    Est. $1,143/mo

    Hardin Buick GMC

    4.6
    Check Availability
    Anaheim, CA (7 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 1500 AT4

    $73,085

    MSRP $76,250

    Est. $1,280/mo

    Reynolds GMC

    4.7
    Check Availability
    West Covina, CA (20 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 AT4

    $64,481

    6,675 mi.
    Est. $1,129/mo

    Jim Marsh Chrysler Jeep

    4.3
    Check Availability
    $300 delivery from Las Vegas, NV (230 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

    $64,429

    1,674 mi.
    Est. $1,128/mo

    AutoCenters Nissan

    4.6
    Check Availability
    $3,132 delivery from Herculaneum, MO (1566 mi)
    Quick view

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 (6 reviews)

83% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.3
Interior
4.3
Performance
4.5
Value
3.7
Exterior
4.5
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)
Skip to Listings
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed

2026 GMC Sierra 1500 AT4 by city

GMC Sierra 1500 trims