2026 GMC Sierra

Recent Arrival!This NEW 2026 Summit White GMC Sierra 1500 SLT EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Standard Suspension Package, Trailering Package (Hitch Guidance), 10-Speed Automatic, 4WD, Jet Blk Perforated Lth-Ap Leather, 10-Way Power Driver Seat Adjuster with Lumbar, 10-Way Power Passenger Seat Adjuster with Lumbar, 120-Volt Bed Mounted Power Outlet, 120-Volt Interior Power Outlet, 170 Amp Alternator, 2 Charge/Data USB Ports, 2 Type-C Charge-Only Rear USB Ports, 3.23 Rear Axle Ratio, 4-Wheel Disc Brakes, 6 Speakers, 6-Speaker Audio System Feature, ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM with 360L, Apple CarPlay/Android Auto, Auto High-beam Headlights, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Auto-Locking Rear Differential, Automatic Emergency Braking, Automatic temperature control, Auxiliary External Transmission Oil Cooler, Brake assist, Buckle to Drive, Bumpers: chrome, Chrome Header and Chrome Grille Insert Bars, Color-Keyed Carpeting Floor Covering, Compass, Deep-Tinted Glass, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electric Rear-Window Defogger, Electronic Stability Control, Emergency communication system: OnStar, Following Distance Indicator, Forward Collision Alert, Front 40/20/40 Split-Bench Seat, Front anti-roll bar, Front Center Armrest w/Storage, Front dual zone A/C, Front fog lights, Front Frame-Mounted Black Recovery Hooks, Front Pedestrian Braking, Front Rain-Sensing Wipers, Front reading lights, Front wheel independent suspension, Fully automatic headlights, HD Rear Vision Camera, Heated door mirrors, Heated Driver and Front Outboard Passenger Seating, Heated front seats, Heated steering wheel, Illuminated entry, Integrated Trailer Brake Controller, IntelliBeam Automatic High Beam on/Off, Keyless Open and Start, Lane Keep Assist with Lane Departure Warning, LED Cargo Area Lighting, Low tire pressure warning, Manual Tilt-Wheel and Telescoping Steering Column, Memory seat, Navigation System, Occupant sensing airbag, OnStar Services Capable, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Outboard Seat Trim, Perimeter Lighting, Power Door Locks, Power door mirrors, Power driver seat, Power Front Passenger Windows with Express Up/Down, Power Front Windows with Driver Express Up/Down, Power passenger seat, Power Rear Windows with Express Down, Power steering, Power windows, Push Button Start, Radio data system, Radio: Premium GMC Infotainment Audio System, Rain sensing wipers, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear Wheelhouse Liners, Rear window defroster, Remote keyless entry, Remote Vehicle Starter System, Security system, SiriusXM with 360L Trial Subscription, Speed control, Speed-sensing steering, Split folding rear seat, Steering Wheel Audio Controls, Steering wheel mounted audio controls, Tachometer, Telescoping steering wheel, Theft Deterrent System (unauthorized Entry), Tilt steering wheel, Traction control, Trip computer, Variably intermittent wipers, Voltmeter, Wheels: 18 x 8.5 6-Spoke Machined Aluminum, Wi-Fi Hotspot Capable, and Wireless Apple CarPlay/Wireless Android Auto.10-Speed Automatic, 4WD, Jet Blk Perforated Lth-Ap Leather.At O'Fallon Buick GMC, we're more than just a car dealership in O'Fallon. We're also members of the greater St Peters, Chesterfield, St Louis and St Charles MO communities, who work and live here just like you, and we want only what's best for our neighbors. We strive to support community initiatives and events, and we're committed to delivering the best customer service around.