2026 GMC Sierra 1500 AT4

At a glance: 6.2L ECOTEC3 V8 · 10-speed automatic with Electronic Precision Shift · 4WD · Crew Cab / short bed · delivery miles only · Sterling Metallic exterior / Jet Black with Kalahari Accents interior

Trailering and capability: The Trailering Package and integrated trailer brake controller are on board, joined by the in-vehicle trailering system app, Hitch View, Trailer Side Blind Zone Alert, and trailer camera provisions. Under the truck you will find an auto-locking rear differential, a 2-speed transfer case, off-road suspension, skid plates, and red recovery hooks — plus a heavy-duty air filter and both an external engine oil cooler and an auxiliary external transmission oil cooler for sustained work loads.

Hill Descent Control handles steep grades, and 275/60R20 all-terrain tires on 20x9 machined aluminum wheels keep grip on whatever surface is underneath.

Technology and driver assistance: The Technology Package adds a Rear Camera Mirror, a 15-inch diagonal multicolor head-up display, and a Bed View Camera. HD Surround Vision, Ultrasonic Front and Rear Park Assist, Rear Cross Traffic Braking, Rear Pedestrian Detection, and GMC Pro Safety round out the driver-assistance suite.

Inside, the 13.4-inch diagonal premium GMC Infotainment System with Google built-in apps — including navigation and voice assistance — pairs with wireless Apple CarPlay and Android Auto, a Bose 7-speaker premium sound system, SiriusXM with 360L trial subscription, and wireless charging. A 220-amp alternator and a 120-volt interior power outlet handle power demands on and off the job.

Comfort and convenience: The cabin is finished with ventilated and heated front bucket seats, heated second-row outboard seats, and a Jet Black perforated leather interior with Kalahari accents. A power sunroof, power sliding rear window with rear defogger, remote vehicle starter, keyless open and start with push-button start, and a power rake and telescoping steering column are all included.

Front premium floor liners with removable carpet inserts, rear wheelhouse liners, and a spray-on pickup bedliner with GMC logo protect the truck's surfaces. Active dual exhaust with sport mode, perimeter lighting, and LED cargo area lighting finish the picture.

The AT4 Preferred Package adds a universal home remote, and the AT4 Premium Package rounds the build to its full specification.

Napleton Buick GMC is at 6305 Northwest Hwy in Crystal Lake, on US-14 and steps from the Metra UP-NW line — a straightforward drive for shoppers coming from Huntley, McHenry, Woodstock, and Barrington. Napleton is a family-owned group with more than 80 years in the business, and the process here is low-pressure from first question to final signature.

If you are ready to put this Sierra to work, we are ready to open the doors.