Recent Arrival! CELAN CAR FAX ONE OWNER! Who can say that with 99k miles! We can! If you’re looking for a truck that delivers proven power, premium comfort, and serious value, this 2021 GMC Sierra 1500 SLT is ready to impress—available now at O'Neil GMC.Finished in sharp Satin Steel Metallic with a refined Jet Black interior, this Sierra has the bold, professional look you want in a full-size pickup. With 99,701 miles, it’s a well-traveled truck that still has plenty of capability left—making it an excellent value for budget-conscious buyers who don’t want to sacrifice performance.Under the hood, the trusted EcoTec3 5.3L V8 delivers strong, reliable power, paired with an 8-speed automatic transmission for smooth shifting and confident towing. Combined with 4WD, this truck is built to handle job sites, tough weather, and weekend adventures with ease.Step inside the spacious Crew Cab, and you’ll find the SLT trim brings a higher level of comfort and refinement—perfect for long drives, daily commutes, or hauling the whole crew. It’s a truck that works hard but doesn’t forget about driver comfort.If you’ve been searching for a dependable, well-equipped pickup at a great price point, this Sierra 1500 SLT deserves a closer look.Don’t miss out—call 215-672-0900 today to speak with our sales team or schedule your visit. Better yet, stop by O'Neil GMC and see what this truck can do for you.Our model lineup is second to none! Make sure you swing in today to get an incredible deal on many new and used Buick and GMC models. These vehicles come packed full of features including a one-of-a-kind navigation system that will get you to any location efficiently and safely. Have kids and want to keep them entertained? Our Rear Seat DVD equipped vehicles will have them settled in for those long trips. The average family is getting larger and larger so make sure to check out our vehicles with the extra space with third row seating that can fit kids, dogs, adults, and more! Of course, when it gets chilly in those winter months, features like climate control and heated leather seating are exactly what your body needs for an early morning trip into work. Check out all of these features and more in our stock of vehicles. Other features include but are not limited to Power Moonroof, New Battery, New Tires, Non-Smoker Interior, Paddle Shifters, One Owner Carfax Certified, Premium Wheels, 30+ MPG, Premium Cloth Seating, New Brakes, Premium Sound System, Rear Bucket Seats, Remainder of Factory Warranty, Rear Back-Up Sensors, Remote Keyless Entry, Service Records Available, Steering Wheel Controls, Remote Start, Tow Package, Traction Control, XM Radio, USB Ports, and much more! Price excludes tax, tags, title, license, and dealer fees, additional rebates may apply. See our specials for more details.