The 2023 GMC Sierra 1500 AT4 in Summit White with Jet Black interior and Kalahari accents delivers premium truck comfort, refined 4WD capability, and smooth diesel-style torque in a package built for drivers who want more than just a plain work truck. Powered by a 3.0L I6 engine and paired with a 10-speed automatic transmission, this Sierra AT4 offers confident towing and hauling ability, composed highway manners, and the kind of upscale off-road-ready presence that makes it feel equally at home on the ranch, the road, or the jobsite. With 101,865 miles, this Crew Cab still brings strong value, broad buyer appeal, and premium truck utility in a package that knows how to work without looking stripped down.Entertainment and Connectivity Features Large touchscreen infotainment display Apple CarPlay integration Android Auto integration Bluetooth hands-free connectivity USB charging and media ports Steering wheel mounted audio and phone controls Voice recognition capability Wi-Fi hotspot capability Navigation capability Digital driver information displayAdded Features AT4 trim package Summit White exterior Jet Black interior with Kalahari accents Four-wheel drive capability 3.0L I6 performance Crew Cab configuration Premium interior appointments Strong towing and hauling appeal Off-road-inspired styling and stance Broad personal-use and work-truck versatilitySafety Features Automatic Emergency Braking Forward Collision Alert Lane Keep Assist with Lane Departure Warning Following Distance Indicator HD rear vision camera Electronic Stability Control Anti-lock braking system Tire pressure monitoring system Advanced airbag system Teen Driver capabilityStandard Features LED headlamps and LED daytime running lights Premium alloy wheels Dual-zone automatic climate control Power windows and door locks Push-button start capability Spacious Crew Cab interior Fold-up rear seating for added interior flexibility Tilt and telescoping steering wheel Rear seat air vents AT4-specific rugged exterior styling accentsMechanical Features 3.0L I6 engine 10-speed automatic transmission Four-wheel drive Off-road suspension capability Four-wheel disc brakes Electric power steering Strong towing and hauling performance Smooth power delivery for daily driving and heavy use Built for work, travel, and off-road confidence Proven full-size truck practicalityWhy drivers choose Port Lavaca Auto Group for their next vehicle Trusted dealership serving Texas drivers with transparent, pressure-free buying experiences Large selection of quality SUVs, trucks, and cars ready for immediate delivery Knowledgeable product specialists who help match drivers with the right vehicle Flexible financing options for a wide range of buyers Ongoing customer support and service after the sale Strong reputation backed by consistent five-star Google reviewsCustomer Review HighlightWe shopped around quite a bit before buying, and Port Lavaca Auto Group stood out right away. They were professional, easy to talk to, and made sure everything was clear from start to finish. Heather W., March 2026From its premium AT4 trim and 4WD capability to its refined Crew Cab comfort and strong everyday utility, the 2023 GMC Sierra 1500 is built for drivers who want full-size truck strength, upscale style, and practical confidence in a pickup that still knows how to earn its keep.