Used Vehicles

Vehicle Specials

Important Information Hide Information

1. Only on the 5.3L EcoTec3 V8 Engine. For trade assistance, you must show proof of ownership and trade in a 2009 model year or newer vehicle. Not available with lease and some other offers. Take new retail delivery by 12/4/23. Available accessories shown.

Important Information Hide Information

1. Length of contract limited. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 2. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 3. Deferred monthly payments for 90 days. Excludes residents of PA. Must finance with GM Financial. Some customers may not qualify. Down payment required at signing, if applicable. Finance charges accrue from date of financing. Not available with lease and some other offers. Take new retail delivery by 12/4/23.

Important Information Hide Information

1. To qualify for the General Motors Limited-Time Special, you must: (1) be a current Costco member by 10/31/23; (2) register with Costco Auto Program online or through its call center by 1/2/24 to receive a certificate with your unique promotion code; (3) present your certificate and unique promotion code to any GMC dealer at time of visit; (4) take in-stock delivery or place a factory order between 11/1/23, and 1/2/24 of a new 2022, 2023, or 2024 GMC: Sierra 1500 or Terrain to receive a $1,000 Costco member-only incentive. Incentive will be applied at time of eligible purchase or lease and is compatible with current eligible manufacturer incentives for which you qualify. Incentive is subject to change without notice. Visit CostcoAuto.com/Save for full details.

Important Information Hide Information

^Eligible brands are ACDelco Gold ($20 rebate per battery), ACDelco Original Equipment ($10 rebate per cabin air filter, $10 rebate per engine air filter, $15 rebate on three wiper blades). Purchase and installation must be at a participating U.S. GM Dealer. Installation not required for wiper rebate. See mycertifiedservicerebates.com for details and rebate form, which must be submitted by 3/31/2024. Limit one rebate per part category per-VIN. Rebate will be issued as a Visa Gift Card; allow 6 to 8 weeks for delivery of gift card. Offer ends 2/29/2024.

Important Information Hide Information

*Ad, written estimate, or internet quote for identical tire(s) from a competing tire retailer/installer located within 100 miles of the dealer required during guarantee period for price match. Tire match price must be determined prior to applying a tire manufacturer rebate, if any. At participating dealers only. Offer ends 12/31/2023.

Important Information Hide Information

1. Length of contract limited. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 2. Only on the 5.3L EcoTec3 V8 Engine. For trade assistance, you must show proof of ownership and trade in a 2009 model year or newer vehicle. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 3. Deferred monthly payments for 120 days. Excludes residents of PA. Must finance with GM Financial. Some customers may not qualify. Down payment required at signing, if applicable. Finance charges accrue from date of financing. Not available with lease and some other offers. Take new retail delivery by 12/4/23. Available accessories shown.

Important Information Hide Information

1. Length of contract limited. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 2. MUST BE A CURRENT OWNER OF A 2009 MODEL YEAR OR NEWER BUICK OR GMC VEHICLE OR A CURRENT LESSEE OF A 2018 MODEL YEAR OR NEWER BUICK OR GMC VEHICLE THROUGH GM FINANCIAL FOR AT LEAST 30 DAYS PRIOR TO NEW VEHICLE SALE. Not available with lease and some other offers. Take new retail delivery by 12/4/23. 3. Deferred monthly payments for 120 days. Excludes residents of PA. Must finance with GM Financial. Some customers may not qualify. Down payment required at signing, if applicable. Finance charges accrue from date of financing. Not available with lease and some other offers. Take new retail delivery by 12/4/23.

Shop by Payment

$299 or less

$399 or less

$499 or less

GMC Lineup

Offers & Incentives

See how O'Meara GMC can save you $$$ on your next vehicle!

Learn More

Holding car keys in door about to drive away in their new car from O'Meara GMC!

Get Approved

Apply online using our quick credit application to get started.

Apply Now

The History of O'Meara

O'Meara has been serving Thornton, Northglenn and the rest of Colorado since 1913.

LEARN MORE

Welcome to O'meara GMC - Denver's Best

Our dealership is a great solution for any auto buyer, looking for a New GMC or Used Vehicles, Cars, Trucks, and SUVs. All you have to do is drop by our Thornton GMC showroom and pick what suits your needs the best, and our qualified and friendly staff will take care of the rest. We look after all your automotive needs, right from New and Used Vehicle Sales, Auto Service and Repair, GM Auto Parts, accessories, tires, as well as Automotive Financing options. Our GMC dealership is very conveniently located in Thornton near Westminster, CO. So, what are you waiting for? All Denver area GMC drivers can make the short drive to our dealership today in Thornton CO!

GMC AUTO SERVICE AND PARTS CENTER IN THORNTON

We offer parts, service, and auto body shop at O'meara GMC for your convenience. Our GM-certified technicians provide superior maintenance for your GM vehicles and all other makes and models and stand by their work. Thornton drivers will be glad to learn that keeping their automobile running well shouldn't be complicated or difficult. This is why our Certified GM service and auto parts center is a perfect option for Denver GMC drivers looking for the best in vehicle maintenance and repairs.

We look forward to meeting you and serving you in person at O’Meara GMC , the employees at look forward to your visit at our dealership. Give us a call or use our step by step Driving Directions for driving instructions from Denver, Thornton, Aurora, Golden, Littleton, Longmont, Henderson, Lone Tree, Colorado Springs, Boulder, Brighton, Pueblo, Loveland, and more.

Quick Links to Our Denver New & Used Car Dealerships

O’Meara Ford

O’Meara Volkswagen

O'Meara Automotive Group

Ask A Question

Our Reviews

Google Dec 1, 2023

Ben for being up front and honest really appreciate it

Google Dec 1, 2023

Vince was great sales man. Highly recommend

Google Nov 30, 2023

It was good, no issues.

Google Nov 30, 2023

After going to 5 dealerships, O'Meara GMC was able to fix my cruise control and transmission issues. Jeff, Annissa and Chris worked with me to get me triluck fixed in reasonable time and kept me informed of the status.

Google Nov 26, 2023

All of the people at O’Meara were extremely helpful and understanding towards what we were looking for! David, specially, was extremely kind and knowledgeable not only on the car we ended up with, but on his current inventory of what they had. He was extremely patient and I would recommend him to anyone. Management was also amazing, outgoing, and willing to work with us.

Google Nov 26, 2023

Great dealership

Google Nov 26, 2023

David was awesome and super friendly

Google Nov 26, 2023

Great experience with Stuart today thank you for the help

Google Nov 26, 2023

OMG have you guys ever needed a car/truck go here they super nice

Google Nov 25, 2023

Very good service best dealership I’ve been too!

Google Nov 25, 2023

(Translated by Google) Excellent service (Original) Excelente servicio

Google Nov 22, 2023

I liked how chloe treated and took good care of us, like how she’s easy going .

Google Nov 21, 2023

David was very helpful, recommended my sister a good truck and I wasn’t even present till the end of it so that’s a first! 💪

Google Nov 19, 2023

Both Lorenzo and Ben dis a great job! Jeremy also was very professional and patient.

Google Nov 19, 2023

Ben and Lorenzo were fantastic team and appreciate their candor and professionalism.

Google Nov 19, 2023

Took in all my concerns and options to get things done

Google Nov 18, 2023

Jose and Vince were incredible! They did everything they could to get me into my Chevy Trailblazer! I highly recommend going to O’Meara and asking for them!!! AMAZING!!!

Google Nov 18, 2023

Jose and Vince were the two sales men that worked with us I would recommend them to anyone

Google Nov 18, 2023

Manny helped us get the exact truck we were looking for. Very helpful and professional.

Google Nov 17, 2023

Nice and respectful

Google Nov 17, 2023

Logan was great, was very helpful and caring, he gave me a lot of guidance through making a purchase. He is an outstanding employee.

Google Nov 17, 2023

Although it was a while to get all of my parts Anessa did such a great job she kept in touvh woth me and got everything covered ill be bringing my car back for sure

Google Nov 16, 2023

Lorenzo was friendly and great work with.

Google Nov 15, 2023

What great group of professionals. The wife and I had a great buying experience. Thanks guys Donnie Valdez

Google Nov 15, 2023

Other than it was hard to get an appointment and when we arrived they said was not on the schedule like we were told for the time and day. The service writer made sure we were taken care of, without a lot lost amount of time since we were waiting for the vehicle