O'Neil GMC

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

GO BIRDS 💚🦅Check out our first 2027 GMC Acadia to land here at O’Neil GMC, in a brand new color, Trailstone Green Metall...
10/26/2026

GO BIRDS 💚🦅

Check out our first 2027 GMC Acadia to land here at O’Neil GMC, in a brand new color, Trailstone Green Metallic. Just in time for Monday Night Football in Philadelphia!

Save up to $2,000 off MSRP through 10/31/2026!

Stock number T7067 https://www.oneilgmc.com/new-Warminster-2027-GMC-Acadia-Elevation-1GKENKKS9VJ172129

✅ Elevation Premium Package
✅ Luxury Package
✅ 15” Diagonal GMC Infotainment System
✅ 12-Speaker Bose Premium Audio System
✅ HD Surround Vision with Surround Vision Recorder

Don’t miss out! Call, visit us online, or stop by our showroom to take home this new 2027 Acadia today!

This week, members of our sales team visited Monticello Motor Club in Monticello, NY for hands-on product and sales trai...
10/23/2026

This week, members of our sales team visited Monticello Motor Club in Monticello, NY for hands-on product and sales training for new 2027 GMC models!

Our team experienced interactive classroom labs to break down GMC’s latest vehicle technology, as well as off-road test-drives alongside performance drivers!

In the classroom labs, our team learned about the all-new 5.7L and 6.6L V8 gas engines for the 2027 Sierra 1500’s, the all-new 8.3L turbo-diesel engine and enhanced 6.6L gas for the Sierra Heavy Duty models, the new 2027 GMC HUMMER EV Icon | 25, and so much more.

On the track, participants were able to test the trailering capabilities of the new Sierra HD’s, off-roading with the Sierra AT4X, and demonstrate Super Cruise technology in the 2027 GMC Acadia!

We are thrilled to be able to share our experience and new knowlege of GMC capability and technology to help you select your new SUV, pickup truck, or EV!





GMC

Rachael, we would love to thank you for choosing O'Neil GMC again, as well as congratulate you on your brand new 2027 Te...
10/21/2026

Rachael, we would love to thank you for choosing O'Neil GMC again, as well as congratulate you on your brand new 2027 Terrain Elevation! We hope you are enjoying your new SUV!

See our full GMC Terrain selection, here - https://www.oneilgmc.com/searchnew.aspx

Enjoy a five-star experience, everywhere you go in the GMC Yukon Denali.
10/21/2026

Enjoy a five-star experience, everywhere you go in the GMC Yukon Denali.

🎃👻 Join us for a FREE Trunk or Treat at O'Neil GMC!Bring the whole family for some Halloween fun and candy as we celebra...
10/19/2026

🎃👻 Join us for a FREE Trunk or Treat at O'Neil GMC!

Bring the whole family for some Halloween fun and candy as we celebrate with our local community! 🍬🚗

📅 Saturday, October 31
⏰ 11 AM–2 PM
📍 869 W. Street Road, Warminster, PA 18974

Costumes encouraged! We can't wait to celebrate with you!

Ernest and Denise, we want to thank you for your recent purchase with us on your brand new 2026 GMC Sierra 1500 AT4 Blac...
10/16/2026

Ernest and Denise, we want to thank you for your recent purchase with us on your brand new 2026 GMC Sierra 1500 AT4 Black Widow truck!

Congratulations! We hope you are enjoying your new ride!

The country is your campsite when you’ve got a GMC Sierra 1500 AT4.
10/14/2026

The country is your campsite when you’ve got a GMC Sierra 1500 AT4.

🔥 2022 Subaru Outback Limited — $309/MONTH! 🔥Loaded with AWD, premium comfort, and tons of technology, this Outback Limi...
10/08/2026

🔥 2022 Subaru Outback Limited — $309/MONTH! 🔥

Loaded with AWD, premium comfort, and tons of technology, this Outback Limited is the kind of SUV you’ll want to see in person.

$309/month for 84 months with $5,000 cash or trade — qualified buyers.

PLUS, you’ll get a FREE oil change at O’Neil GMC with your purchase!

👉 Check it out here: https://www.oneilgmc.com/used-Warminster-2022-Subaru-Outback-Limited-4S4BTANC3N3262704

📍 O’Neil GMC | Warminster, PA
📞 (215) 672-0900

Come take it for a drive — this one is worth seeing!

Because extreme is your every day. Experience the peak of off-roading in the Canyon AT4X.
10/07/2026

Because extreme is your every day. Experience the peak of off-roading in the Canyon AT4X.

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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