Vehicle highlights
- 4WD
- Apple CarPlay
- Android Auto
- Blind Spot Assist
- Backup Camera
- Heated Seats
Price and listing details
Price breakdown
- MSRP
- $74,780
- List price
- $71,349
- Fees, rebates & discounts
- -$2,563
- Advertised price
- $68,786
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
- 148
- VIN
- 1GTUUEE87TZ539099
- Seen in inventory
- Listing updated
Confirm availability and transaction details with the dealership.
Specifications
Overview
- Year
- 2026
- Make
- GMC
- Model
- Sierra 1500
- Trim
- AT4
- Condition
- New
- Body
- Pickup
Engine & drivetrain
- Fuel
- Diesel
- Driveline
- 4WD
- Transmission
- Automatic
- MPG
- City 22 / Hwy 26
- Engine
- 3L I-6 direct injection, DOHC, variable valve control, intercooled turbo, diesel, engine with 305HP
Exterior & interior
- Exterior color
- Black
- Interior color
- Black
Seating and powertrain
- Seats
- Not confirmed
- Third row
- Not confirmed
- Powertrain
- Diesel
Seat count does not confirm a third row. Check unconfirmed details with the dealership.
Features
45 listedSafety
13
- Backup Camera
- Lane Keep Assist
- Parking Sensors (Front and Rear)
- Lane Departure Warning
- Forward Collision Warning
- Pedestrian Automatic Emergency Braking
- Cruise Control
- Blind Spot Assist
- Forward Collision Alert with Automatic Braking, Front Pedestrian Braking
- Lane Keep Assist with Lane Departure Warning
- Rear Cross Traffic Braking collision mitigation
- Front and Rear Park Assist front and rear parking sensors
- Rear Seat Reminder rear seat check warning
Comfort & interior
9
- Remote Start
- Leather Seating
- Heated Steering Wheel
- Cooled Seats
- Heated Seats
- Power Seats
- Climate Control
- Sequential shift with steering wheel controls
- Keyfob remote start
Technology
9
- Apple CarPlay
- Android Auto
- Head-up Display
- Navigation
- Bluetooth
- Wi-Fi Hotspot capable mobile hotspot internet access
- Premium GMC Infotainment System external memory control
- Internet radio capability
- 6 USB ports, Hill Descent Control (HDC), Hill Start Assist (HSA)
Exterior & utility
9
- Trailer Hitch
- Trailer Brake Controller
- Tow Hitch
- Vehicle to trailer hitching assist
- Trailer light test
- Trailer light malfunction warning
- Trailer theft alarm
- Trailer sway control
- Tinted Windows
Performance
5
- AutoTrac part and full-time 4WD
- Duramax 3L I-6 direct injection, DOHC, variable valve control, intercooled turbo, diesel, engine with 305HP
- Duramax 3L I-6 DOHC
- Auto stop-start engine, Intercooled turbo
- Selectable mode transmission
Dealer notes
The 2026 GMC Sierra 1500 AT4 — new, four-door crew cab, short bed, 4WD — is on the lot at Napleton Chevrolet Buick GMC in Beaver Dam, WI, finished in Onyx Black with a Jet Black with Kalahari Accents interior trimmed in perforated leather. Built around the Duramax 3.0L turbo-diesel inline-six and paired with a 10-speed automatic with Electronic Precision Shift, this AT4 is loaded with both the AT4 Premium Package and Preferred Equipment Group 4SB — the kind of build that goes straight from a rough two-track to a dinner reservation.
At a glance: Duramax 3.0L turbo-diesel I6 · 10-speed automatic with Electronic Precision Shift · 4WD with 2-speed transfer case · crew cab, short bed · new · Onyx Black exterior · Jet Black with Kalahari Accents perforated leather interior
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The AT4 was designed around off-road use, and this build backs that up. The Preferred Equipment Group 4SB adds the off-road suspension and auto-locking rear differential, skid plates for underbody protection, red recovery hooks, and dealer-installed off-road high-clearance steps.
All-terrain tires — 275/60R20 — are mounted on 20×9 machined aluminum wheels, and hill descent control is included for the steeper stuff. The Trailering Package and integrated trailer brake controller mean you can hook up when the trail turns into a tow job, with hitch guidance, Hitch View, trailer camera provisions, and Trailer Side Blind Zone Alert all part of the system.
A heavy-duty air filter and a 220-amp alternator round out the work-ready side of this build.
Inside, the story shifts. Front seats are heated and ventilated; second-row outboard seats are heated as well. Remote start, keyless open and push-button start, a power rake and telescoping steering column, and a floor-mounted center console make every trip comfortable.
The Premium Bose 7-speaker sound system is included, as is wireless charging, a 120-volt interior power outlet, and four USB ports — two inside the console and two Type-C rear charge ports. The 13.4-inch GMC Infotainment System with Google Built-In handles navigation and voice assistance, and wireless Apple CarPlay and Android Auto are included.
The Technology Package adds a multicolor 15-inch diagonal head-up display, a rear camera mirror with auto-dimming, and a bed view camera. HD Surround Vision, ultrasonic front and rear park assist, rear cross traffic braking, rear pedestrian detection, and forward collision mitigation complete the driver-assistance picture.
The AT4 Preferred Package contributes a power sliding rear window with rear defogger and a universal home remote. A spray-on bedliner, front premium floor liners, rear wheelhouse liners, deep-tinted glass, perimeter lighting, and LED cargo area lighting are also on board.
An engine block heater and front and rear molded splash guards in black were added at the dealer as well.
Napleton Chevrolet Buick GMC is at N8167 Kellom Rd. in Beaver Dam — about 45 minutes from Madison, an hour from Milwaukee, and 35 minutes from Fond du Lac, serving drivers from Hartford, West Bend, Waupun, and across central Wisconsin. We have been family-owned for more than 80 years, and we think buying a truck should feel straightforward, not pressured.
If the diesel AT4 is the build you have been speccing out, this one is ready to go.
Dealership location
Napleton Chevrolet Buick GMC
Dealer: Napleton 151
N8167 Kellom Rd, Beaver Dam, WI, 53916
