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  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $83,461

    $4.5K
    Est. $1,533/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $81,956

    $5.5K
    Est. $1,506/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,956

    $3.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,756

    $4.8K
    Est. $1,539/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $81,956

    $5.5K
    Est. $1,506/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $83,461

    $4.5K
    Est. $1,533/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,956

    $4.5K
    Est. $1,542/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $103,951

    $3.5K
    Est. $1,910/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $86,256

    $1.5K
    Est. $1,585/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4

    $85,761

    Est. $1,575/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4

    $85,761

    Est. $1,575/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4

    $83,261

    $4.8K
    Est. $1,530/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4

    $83,261

    $4.8K
    Est. $1,530/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4

    $83,756

    $4.8K
    Est. $1,539/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4

    $85,761

    $1.5K
    Est. $1,575/mo

    Temecula Valley Buick GMC

    4.4
    Temecula, CA (16 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $89,390

    $600
    9,435 mi.
    Est. $1,642/mo

    Lifted Trucks

    4.5
    $670 delivery from Tucson, AZ (363 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $86,980

    $11K
    9,384 mi.
    Est. $1,598/mo

    Lifted Trucks

    4.5
    $670 delivery from Tucson, AZ (363 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $74,159

    6,842 mi.
    Est. $1,362/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (47 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $73,060

    19,405 mi.
    Est. $1,342/mo

    Costa Mesa GMC

    1.5
    Costa Mesa, CA (50 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $78,127

    $4.5K

    MSRP $89,505

    Est. $1,435/mo

    Laguna Niguel GMC

    Laguna Niguel, CA (33 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $83,437

    $4.5K

    MSRP $90,025

    Est. $1,533/mo

    Marvin K Brown Buick GMC

    4.7
    San Diego, CA (37 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $83,437

    $4.5K

    MSRP $90,025

    Est. $1,533/mo

    Marvin K Brown Buick GMC

    4.7
    San Diego, CA (37 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,437

    $4.5K

    MSRP $90,025

    Est. $1,533/mo

    Marvin K Brown Buick GMC

    4.7
    San Diego, CA (37 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $83,437

    $4.5K

    MSRP $90,025

    Est. $1,533/mo

    Marvin K Brown Buick GMC

    4.7
    San Diego, CA (37 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $79,542

    MSRP $79,420

    Est. $1,461/mo

    Moss Bros. GMC

    4.2
    Moreno Valley, CA (45 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4Sterling Metallic 2026 GMC Sierra 2500 AT4

    $90,232

    MSRP $90,110

    Est. $1,658/mo

    Moss Bros. GMC

    4.2
    Moreno Valley, CA (45 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4Onyx Black 2026 GMC Sierra 2500 AT4

    $79,127

    $4.5K

    MSRP $90,505

    Est. $1,454/mo

    Laguna Niguel GMC

    Laguna Niguel, CA (33 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4Summit White 2026 GMC Sierra 2500 AT4

    $77,632

    $4.5K

    MSRP $89,010

    Est. $1,426/mo

    Laguna Niguel GMC

    Laguna Niguel, CA (33 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4Coastal Dune 2026 GMC Sierra 2500 AT4

    $78,127

    $4.5K

    MSRP $89,505

    Est. $1,435/mo

    Laguna Niguel GMC

    Laguna Niguel, CA (33 mi)
    Check Availability

About the 2026 GMC Sierra 2500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
0
Transmission
10-Speed A/T
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2026 GMC Sierra 2500 AT4
FAQs

How much does the 2026 GMC Sierra 2500 AT4 cost?

The 2026 GMC Sierra 2500 AT4 price depends on optional features. Prices typically start at $72,500.

What are some similar vehicles and competitors of the 2026 GMC Sierra 2500 AT4?

The 2026 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:


Trims

AT4 (2 styles)

Style
4WD Crew Cab 159" AT4 4WD Crew Cab 172" AT4
Inventory price
Starting at $72,500 Starting at $72,700
Combined MPG
0 0
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

2026 GMC Sierra 2500 AT4 by city