Vehicle highlights
- 4WD
- Apple CarPlay
- Android Auto
- Blind Spot Warning
- Backup Camera
- Leather Seating
Price and listing details
Price breakdown
- MSRP
- $89,785
- List price
- $85,935
- Fees, rebates & discounts
- -$4,063
- Advertised price
- $81,872
This is the net difference between the list and advertised prices. It may include fees, rebates, discounts, or other dealer adjustments. Confirm details and eligibility with the dealer.
Mandatory dealer charges are included in this advertised price. The dealer did not provide Car Handshake with an itemized fee breakdown. View the dealer’s listing or contact the dealer for details. Taxes, title, registration, and other government charges are additional.
- Stock number
- 326377
- VIN
- 1GT4UPEY8TF401665
- Seen in inventory
- Listing updated
Confirm availability and transaction details with the dealership.
Specifications
Overview
- Year
- 2026
- Make
- GMC
- Model
- Sierra 2500 HD
- Trim
- AT4
- Condition
- New
- Body
- Pickup
- Mileage
- 5 mi
Engine & drivetrain
- Fuel
- Diesel
- Driveline
- 4WD
- Transmission
- Automatic
- Displacement
- 6600 cc
- Engine
- 6.6L V-8 direct injection, intercooled turbo, diesel, engine with 470HP
Exterior & interior
- Exterior color
- White
- Interior color
- Black
Seating and powertrain
- Seats
- 5 seats
- Third row
- Not confirmed
- Powertrain
- Diesel
Seat count does not confirm a third row. Check unconfirmed details with the dealership.
Features
40 listedSafety
12
- Backup Camera
- Blind Spot Warning
- Forward Automatic Emergency Braking
- Rear Cross Traffic Warning
- Parking Sensors (Front and Rear)
- Lane Departure Warning
Show all 12 featuresShow fewer features
- Surround View Camera
- Forward Collision Warning
- Pedestrian Automatic Emergency Braking
- Cruise Control
- Hill Start Assist
- Rear Seat Reminder
Comfort & interior
9
- Heated Front Seats
- Remote Start
- Opening Sunroof
- Leather Seating
- Ventilated Front Seats
- Heated Steering Wheel
Show all 9 featuresShow fewer features
- Push Button Start
- Power Driver Seat
- Keyless Entry
Technology
11
- Apple CarPlay
- Android Auto
- Built-in Navigation
- Wireless Phone Charging
- Head-up Display
- Bluetooth
Show all 11 featuresShow fewer features
- USB Ports
- Satellite Radio
- Touchscreen Display
- Voice Control
- Digital Instrument Cluster
Exterior & utility
8
- Trailer Hitch
- Trailer Brake Controller
- Alloy Wheels
- Fog Lights
- Rain-Sensing Wipers
- Heated Mirrors
Show all 8 featuresShow fewer features
- Tinted Windows
- Trailer Sway Control
Dealer notes
A new 2026 GMC Sierra 2500HD AT4 Duramax diesel is on the lot at Napleton Chevrolet Buick GMC in Beaver Dam — Summit White over a Jet Black with Kalahari Accents interior in perforated front leather, with delivery miles only. While several sibling AT4 diesels are still in transit, this one is here, ready to inspect, configure, and drive.
The build is purpose-stacked for the driver who hauls heavy and wants every trailering and off-road tool the AT4 line offers.
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At a glance: Duramax 6.6L Turbo-Diesel V8 · 10-Speed Automatic · 4WD · 4-door pickup · delivery miles only · Summit White exterior · Jet Black with Kalahari Accents interior
Trailering and work capability define this build. The Preferred Equipment Group 4SB includes the ProGrade Trailering System, HD Surround Vision, a bed-view camera with two trailer camera provisions, and Trailer Side Blind Zone Alert — giving the driver a comprehensive picture of what is behind and beside the truck.
A gooseneck/fifth-wheel prep package adds a hitch platform ready to accept either a gooseneck or fifth-wheel hitch, and the Snow Plow Prep/Camper Package brings a 220-amp alternator and skid plates. An exhaust brake and a 2-speed active transfer case round out the heavy-duty credentials.
The spray-on bedliner and 120-volt bed-mounted power outlet keep the bed working on the job site.
Off-road and comfort come through the AT4 Premium Plus Package — power sunroof, off-road high clearance steps, and the Technology Package — paired with the X31 Off-Road Package, all-terrain tires on 20-inch high-gloss black aluminum wheels. Inside, heated and ventilated front seats, heated second-row outboard seats, wireless charging, and the multicolor 15-inch diagonal head-up display raise the interior well above work-truck spec.
The 13.4-inch diagonal GMC Infotainment System with Google Built-In apps, wireless Apple CarPlay and Android Auto, the Bose premium audio system, and SiriusXM with 360L keep driver and passengers connected on long hauls.
Driver assistance is handled by Sierra HD Pro Safety, Ultrasonic Front and Rear Park Assist, Rear Cross Traffic Alert, forward collision mitigation, and pedestrian impact prevention. The rear camera mirror adds an unobstructed wide-angle view.
A Safety Alert Seat provides tactile warnings, and front rain-sensing wipers handle Wisconsin weather without a second thought. An engine block heater and a winter grille cover make this truck ready for cold starts.
Napleton Chevrolet Buick GMC is at N8167 Kellom Rd. in Beaver Dam — a straightforward drive from Juneau, Horicon, and Mayville, and about 35 minutes from Fond du Lac. Napleton is a family-owned dealer group with more than 80 years in the business and a no-pressure process. If you are ready to put a gooseneck hitch under this truck, we can make that happen.
Dealership location
Napleton Chevrolet Buick GMC Beaver Dam
N8167 Kellom Rd, Beaver Dam, WI, 53916
