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  • Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4Volcanic Red Tintcoat 2026 GMC Sierra 2500 AT4

    $79,193

    $2K

    MSRP $91,085

    Est. $1,468/mo

    Confidence Chevrolet Buick GMC

    4.8
    Midwest City, OK (9 mi)
    Check Availability
  • G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4

    $91,559

    MSRP $90,860

    Est. $1,698/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4

    $91,064

    MSRP $90,365

    Est. $1,688/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4

    $74,824

    MSRP $80,125

    Est. $1,387/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4

    $81,024

    MSRP $80,325

    Est. $1,502/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4

    $83,859

    MSRP $90,660

    Est. $1,555/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4

    $84,354

    MSRP $91,155

    Est. $1,564/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4GNT/VOLCANIC RE 2026 GMC Sierra 2500 AT4

    $84,209

    $7.5K

    MSRP $91,010

    Est. $1,561/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 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

    $81,024

    MSRP $80,325

    Est. $1,502/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 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

    $81,024

    MSRP $80,325

    Est. $1,502/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4

    $91,559

    MSRP $90,860

    Est. $1,698/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4GAZ/SUMMIT WHIT 2026 GMC Sierra 2500 AT4

    $83,564

    $7.5K

    MSRP $90,365

    Est. $1,549/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4

    $84,059

    MSRP $90,860

    Est. $1,559/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4

    $83,759

    MSRP $90,560

    Est. $1,553/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4

    $84,059

    MSRP $90,860

    Est. $1,559/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4

    $91,559

    MSRP $90,860

    Est. $1,698/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 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

    $84,354

    MSRP $91,155

    Est. $1,564/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4G42/COASTAL DUN 2026 GMC Sierra 2500 AT4

    $91,559

    MSRP $90,860

    Est. $1,698/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4GBA/ONYX BLACK 2026 GMC Sierra 2500 AT4

    $84,059

    MSRP $90,860

    Est. $1,559/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 mi)
    Check Availability
  • GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4GXD/STERLING ME 2026 GMC Sierra 2500 AT4

    $91,559

    MSRP $90,860

    Est. $1,698/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 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 AT4

    $86,294

    MSRP $93,095

    Est. $1,600/mo

    Bob Howard Buick GMC

    4.6
    Oklahoma City, OK (19 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

    $74,535

    $2K

    MSRP $90,000

    Est. $1,382/mo

    VanGuard GMC

    4.7
    $399 delivery from Sherman, TX (126 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

    $74,535

    $2K

    MSRP $90,000

    Est. $1,382/mo

    VanGuard GMC

    4.7
    $399 delivery from Sherman, TX (126 mi)
    Check Availability
  • Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4

    $83,204

    $2K
    Est. $1,543/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 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

    $80,099

    $2K
    Est. $1,485/mo

    John Holt GMC

    5.0
    Chickasha, OK (34 mi)
    Check Availability
  • Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4Dune 2026 GMC Sierra 2500 AT4

    $81,504

    $2K
    Est. $1,511/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 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

    $81,709

    $2K
    Est. $1,515/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 mi)
    Check Availability
  • Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4Sterling 2026 GMC Sierra 2500 AT4

    $84,204

    $2K
    Est. $1,561/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 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

    $81,709

    $2K
    Est. $1,515/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 mi)
    Check Availability
  • Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4Volcanic Red 2026 GMC Sierra 2500 AT4

    $82,354

    $2K
    Est. $1,527/mo

    Vance Auto Group Guthrie

    4.6
    Guthrie, OK (35 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