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: Oct 18, 2026, 5:35 AM UTC
Listing updated: Oct 17, 2026, 6:36 AM UTC

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 listed

Safety

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

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

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

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

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 Duramax 3.0L turbo-diesel inline-six under the hood is the detail that sets this 2026 GMC Sierra 1500 AT4 crew cab apart from every gasoline AT4 on the lot — and this one is in transit, arriving soon at Napleton Chevrolet Buick GMC in Beaver Dam. It comes finished in Onyx Black with a Jet Black with Kalahari Accents interior trimmed in perforated leather, and it carries the AT4 Premium Package, the Technology Package, and the Preferred Equipment Group 4SB — the most complete build combination available on the AT4.

At a glance: Duramax 3.0L turbo-diesel inline-six · 10-speed automatic with Electronic Precision Shift · 4WD with 2-speed transfer case · crew cab short bed · in transit, arriving soon · Onyx Black exterior · Jet Black with Kalahari Accents perforated leather interior

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The AT4 Premium Package and Preferred Equipment Group 4SB together deliver the off-road and trailering hardware this trim is built around. Off-road suspension, skid plates, an auto-locking rear differential, hill descent control, and 20 x 9 machined aluminum wheels wearing 275/60R20 all-terrain tires give the truck its trail credentials.

The integrated trailer brake controller, trailering package, trailer side blind zone alert, hitch view with hitch guidance, and trailer camera provisions mean it is equally ready at the hitch. Red recovery hooks and a heavy-duty air filter round out the work-ready spec, and the spray-on bedliner and LED cargo area lighting take care of what rides in the bed.

Inside, the comfort story is thorough: heated and ventilated front seats plus heated second-row outboard seats in perforated leather, a floor-mounted center console, wireless charging, a remote vehicle starter, rain-sensing wipers, a power rake and telescoping steering column, keyless open and start with push-button start, and a 120-volt interior power outlet. Connectivity comes through the 13.4-inch GMC Infotainment System with Google Built-In apps including navigation and voice assistance, wireless Apple CarPlay and Android Auto, a premium Bose 7-speaker sound system, SiriusXM audio, multiple USB ports including two USB-C rear charge-only ports, and available Wi-Fi hotspot.

The Technology Package adds the multicolor 15-inch diagonal head-up display, rear camera mirror with auto-dimming, and a bed-view camera. The AT4 Preferred Package contributes a power sliding rear window with rear defogger and universal home remote.

Driver assistance includes HD surround vision, ultrasonic front and rear park assist, rear cross traffic braking, rear pedestrian detection, forward collision mitigation, and perimeter lighting. The engine block heater is also included — a detail worth noting for Wisconsin winters.

Napleton Chevrolet Buick GMC is at N8167 Kellom Rd. in Beaver Dam, about 35 minutes from Fond du Lac and roughly 45 minutes from Madison, serving buyers from Waupun, Portage, West Bend, and the surrounding area. We have been family-owned for more than 80 years and run a straightforward, no-pressure process.

If you want to get ahead of this one before it arrives, we can walk you through the build and get the paperwork started.

Dealer-provided content. Verify specifications and availability directly with the dealership.