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
  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,465

    Est. $1,479/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)

    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $92,637

    Est. $1,622/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)

    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $84,200

    Est. $1,475/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,653

    Est. $1,482/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,653

    Est. $1,482/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,653

    Est. $1,482/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $80,874

    Est. $1,416/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,974

    Est. $1,488/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)

    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,872

    Est. $1,486/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,786

    Est. $1,485/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4Sterling 2026 GMC Sierra 3500 AT4

    $84,786

    Est. $1,485/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $84,521

    Est. $1,480/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $80,372

    Est. $1,407/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,465

    Est. $1,479/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)

    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,653

    Est. $1,482/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $80,874

    Est. $1,416/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $84,012

    Est. $1,471/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,465

    Est. $1,479/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $92,737

    Est. $1,624/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $80,234

    Est. $1,405/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)

    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $92,737

    Est. $1,624/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    $84,974

    Est. $1,488/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4Onyx Black 2026 GMC Sierra 3500 AT4

    $84,786

    Est. $1,485/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (30 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    $76,645

    MSRP $81,145

    Est. $1,342/mo

    Suntrup Buick GMC

    4.0
    Check Availability
    Saint Peters, MO (15 mi)
    Quick view
  • Sterling Metallic 2026 GMC Sierra 3500 AT4Sterling Metallic 2026 GMC Sierra 3500 AT4Sterling Metallic 2026 GMC Sierra 3500 AT4Sterling Metallic 2026 GMC Sierra 3500 AT4Sterling Metallic 2026 GMC Sierra 3500 AT4Sterling Metallic 2026 GMC Sierra 3500 AT4

    $72,662

    $250

    MSRP $81,320

    Est. $1,272/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    $299 delivery from Naperville, IL (252 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4

    $80,818

    $601
    Est. $1,415/mo

    Behlmann Buick GMC

    4.7
    Check Availability
    Troy, MO (36 mi)
    Quick view
  • Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4Dune 2026 GMC Sierra 3500 AT4

    Not Priced

    Laura Chevrolet Buick GMC of Sullivan, LLC

    4.8
    Check Availability
    Sullivan, MO (39 mi)
    Quick view
  • Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4Summit White 2026 GMC Sierra 3500 AT4

    Not Priced

    Laura Chevrolet Buick GMC of Sullivan, LLC

    4.8
    Check Availability
    Sullivan, MO (39 mi)
    Quick view

About the 2026 GMC Sierra 3500 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 3500 AT4
FAQs

How much does the 2026 GMC Sierra 3500 AT4 cost?

The 2026 GMC Sierra 3500 AT4 price depends on optional features. Prices typically start at $73,400.

What are some similar vehicles and competitors of the 2026 GMC Sierra 3500 AT4?

The 2026 GMC Sierra 3500 AT4 compares to and/or competes against the following vehicles:


Is the 2026 GMC Sierra 3500 AT4 reliable?

The 2026 GMC Sierra 3500 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 3500 owners.

Ratings (2 reviews)

50% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.0
Interior
4.0
Performance
4.5
Value
3.5
Exterior
5.0
Reliability
4.5
Trims

AT4 (2 styles)

Style
4WD Crew Cab 159" AT4 4WD Crew Cab 172" AT4
Inventory price
Starting at $73,400 Starting at $73,600
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)
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 3500 AT4 by city

GMC Sierra 3500 trims