O'Neil GMC

O'Neil GMC O’Neil GMC is a premier provider of GMC and GM Certified Pre-owned automobiles. CUSTOMER SERVICE- Our customers are the reason we exist.

Through a partnership with quality conscious clients, we guarantee complete satisfaction with our products and services. Our commitment to quality is reflected in our concern and response to customer needs. EMPLOYEES- O’Neil’s employees are the backbone of the company and the foundation upon which our success is built. O’Neil’s growth is a direct result of the performance and professionalism of ev

ery individual. We are committed to employee development well being and growth. Employees are our most valued assets!

A master of maneuverability, the GMC HUMMER EV makes high precision the standard.
05/29/2026

A master of maneuverability, the GMC HUMMER EV makes high precision the standard.

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Command power, capability, and comfort with the GMC Sierra Denali Ultimate.
05/27/2026

Command power, capability, and comfort with the GMC Sierra Denali Ultimate.

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Today we were honored to be part of the Memorial Day Parade in Warminster, PAOur O’Neil GMC Sierra had the privilege of ...
05/25/2026

Today we were honored to be part of the Memorial Day Parade in Warminster, PA

Our O’Neil GMC Sierra had the privilege of pulling the band through the parade as the community came together to remember and honor the brave men and women who made the ultimate sacrifice for our country.

Thank you to everyone who came out today!❤️🤍💙

Reach the peak of professional grade with the GMC Sierra 1500 Denali Ultimate.
05/25/2026

Reach the peak of professional grade with the GMC Sierra 1500 Denali Ultimate.

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Our sales department is open until 2:00 today 5/25, parts and service is closed. We will resume normal business hours 5/...
05/25/2026

Our sales department is open until 2:00 today 5/25, parts and service is closed. We will resume normal business hours 5/26.

https://www.oneilgmc.com/

Memorial Day Hours at O'Neil GMC Please note our holiday hours for Monday 5/25/26:🔧 Service Department: CLOSED🚗 Sales De...
05/22/2026

Memorial Day Hours at O'Neil GMC

Please note our holiday hours for Monday 5/25/26:

🔧 Service Department: CLOSED
🚗 Sales Department: OPEN from 9AM – 2PM

📞 Questions? Give our team a call at 215-672-0900.

We hope everyone has a safe and enjoyable Memorial Day weekend! ❤️💙

Congratulations to Evanna & Yan on this beautiful 2022 GMC Terrain! Thank you for trusting us to help you find the perfe...
05/22/2026

Congratulations to Evanna & Yan on this beautiful 2022 GMC Terrain! Thank you for trusting us to help you find the perfect ride!

Check out our pre-owned selection, here 👇
https://www.oneilgmc.com/searchused.aspx

From rocky terrain to remote escapes, the GMC Sierra HD AT4X and Sierra AT4X AEV Edition are built to stand tall.
05/22/2026

From rocky terrain to remote escapes, the GMC Sierra HD AT4X and Sierra AT4X AEV Edition are built to stand tall.

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Continuing GMC’s Truck Month by featuring this 2026 GMC Sierra 1500 Black Widow! Stock number T509https://www.oneilgmc.c...
05/20/2026

Continuing GMC’s Truck Month by featuring this 2026 GMC Sierra 1500 Black Widow! Stock number T509

https://www.oneilgmc.com/new-Warminster-2026-GMC-Sierra+1500-AT4-1GTUUEEL3TZ322301

The Black Widow package includes:
• 6” Suspension Lift System
• 35" Premium All Terrain Tires
• Power Running Boards
• Black Widow Custom Hood Vents
• Tinted Front Windows
• Custom Leather
…and much more!

Call (215)672-0900 or visit us in-store or online for more information!

869 W Street Road
Warminster PA 18974

The GMC HUMMER EV is modern art in motion.
05/20/2026

The GMC HUMMER EV is modern art in motion.

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This 2026 Sierra 1500 Elevation Travis Manion Edition (stock number T134) honors leadership, service, and sacrifice — wi...
05/18/2026

This 2026 Sierra 1500 Elevation Travis Manion Edition (stock number T134) honors leadership, service, and sacrifice — with part of the proceeds of your purchase supporting the Travis Manion Foundation and the incredible work they do for our nation’s heroes. 🇺🇸

For more information on the Travis Manion Foundation Mission, view their website here: https://www.travismanion.org/

The Travis Manion Edition includes:
•Black Assist Steps
•Black GMC Logos
•GMC Bedliner/Cargo Net
•Rear Wheelhouse Liners
•Travis Manion Emblems

Call 215-672-0900 or visit us at 869 W Street Road in Warminster for more information!

Address

869 W Street Road
Warminster, PA
18974

Opening Hours

Monday 9am - 8pm
Tuesday 9am - 8pm
Wednesday 9am - 8pm
Thursday 9am - 8pm
Friday 9am - 8pm
Saturday 9am - 5pm

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