Welcome to DeMarois Buick GMC

1. Monthly payment is $16.67 for every $1,000 you finance. Average example down payment is 12.7%. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 3/3/25.

1. Length of contract limited. Some customers may not qualify. Not available with lease and some other offers. Savings based on Bankrate of 6.11%. Take new retail delivery by 3/3/25. 2. Only on the 5.3L V8 Engine. For trade assistance, you must show proof of ownership and trade in a 2011 model year or newer vehicle. Not available with lease and some other offers. Take new retail delivery by 3/3/25.

1. Monthly payment is $28.16 for every $1,000 you finance. Average example down payment is 24.9%. Some customers may not qualify. Not available with lease and some other offers. Take new retail delivery by 3/3/25. 2. 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 3/3/25.

^Eligible brands are ACDelco Gold ($20 rebate/2,000 points per battery) and ACDelco Original Equipment ($15 rebate/1,500 points per cabin air filter, $15 rebate/1,500 points per engine air filter, and $30 rebate/3,000 points for three wiper blades). My GMC Rewards points used during service transactions do not qualify for earning additional points. Purchase and installation where applicable 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 3/31/2025. Limit one rebate per VIN for battery and filters. Limit three rebates per VIN for wipers. Rebate will be issued as a Visa® Gift Card; allow 6 to 8 weeks for delivery of gift card. Offer ends 2/28/2025. *100 points can be redeemed to receive $1 in purchasing value with My GMC Rewards. Must be 18 years or older. Points earned and redeemed only at GM entities and My GMC Rewards dealers in the United States (excluding Puerto Rico, the U.S. Virgin Islands, and Guam). Visit gmc.com/rewards/terms to view the My GM Rewards Program Terms and Conditions.

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Welcome to DeMarois Buick GMC

A Western Montana Buick, GMC Dealership

DeMarois Buick GMC Truck in Missoula is your hometown car dealership. Our reputation is built on customer trust, and our dedication to making sure your experience with us is not only comfortable but satisfying as well. Located along I-90 at 3115 W Broadway, our dealership is an excellent place to check new and used vehicle inventory. So what are you waiting for? Western Montana Buick, GMC customers should not hesitate to email us or call us at (406) 303-4676.

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Our Reviews

DealerRater Feb 24, 2023

Did a great job. They were professional and fast. Can’t wait to do more with them.

DealerRater Feb 16, 2023

Ivory and Sr technician should be rated 5 stars for service . They treated me well

DealerRater Oct 13, 2022

Extremely Smooth & Seamless Experience In all Areas Of The dealership. I Absolutely Would Recommend This Dealer To All Concerned.

DealerRater Sep 18, 2022

I purchased my truck from DeMarois 3 years ago. I took my truck in for warranty service a couple of times. The service department (and especially Ivory the service writer) have been great to work with.

DealerRater Sep 15, 2022

Ivory in service is the best, she goes above & beyond for her customers, we are very happy with her work.

DealerRater Sep 1, 2022

Excellent customer service! We had problems with our Sprinter van and had to be towed in from Glacier National Park. Inspite of their already busy workload they were able fit us in and get us back on the road and our vacation in a short period of time. Thanks guys!

DealerRater Aug 3, 2022

I receive excellent service each time I visit this dealership. I have also purchased many cars and trucks and am totally satisfied with the interactions I have had with the demarois staff.

DealerRater Jul 22, 2022

Best purchase experience I’ve had in over 5 decades of buying numerous vehicles, including Jeeps, Dodge RAMs, Corvettes, Porsche, Land Rovers, and Mercedes. Friendly, helpful, knowledgeable salesman. Lew did everything promised and had purchase paperwork ready when we showed up to complete purchase. If I were ever to buy another Mercedes, I would definitely go to DeMarois.

DealerRater Jul 5, 2022

I was traveling and had transmission problems. they made an appointment for me the next day. I got stuck in traffic when going there and was 40 minutes late. They still got me in, fixed my issue at a reasonable price, and got me back on the road. Thanks Demoris GMC service

DealerRater Jun 26, 2022

Friendly, competent and professional Thanks again for your help and repair to our new motor home

DealerRater May 27, 2022

I received the initial DEF notification of DEF level at 30% while traveling between Sundance WY and Hardin MT. While in Hardin, I purchased a 2.5 gal. container of API certified DEF and added it to the truck prior to departure for Bozeman MT. The DEF level did not reset during the trip and continued to count down. I made contact with a knowledgeable friend who advised me to go to a dealer for investigation. My friend also said that it could take a number of start-run- off cycles to reset. I went grocery and pet food shopping in Bozeman (4 cycles in addition to the one for departing Hardin). While traveling to Missoula MT the DEF level was frozen at 24%. After arriving in Missoula, I contacted Demarois and got an appointment for the following morning, as they had a cancellation. Within and hour, it was determined there we no trouble codes and that the DEF level sensor was working, plus the level sensor was recalibrated. I was advised that it can take 20 starting cycles before the level resets. The charges we quite reasonable. The DEF level now shows OK. I am quite happy with service advisor Ivory and the shop diesel technician who did the work. I recommend this dealership.

DealerRater May 19, 2022

Friendly staff, very professional, excellent warranty work on your vehicle. Would definitely go back for work on my vehicle.

DealerRater Apr 22, 2022

Always professional, courteous, and expedient. I wouldn’t go anywhere else for my car needs.

DealerRater Mar 31, 2022

Wonderful service we always tell all our friends to go to Lou at DeMarois best in the business. The Bells

DealerRater Mar 25, 2022

Very pleasant folks. Straightforward and zero pressure or salesman tricks and gimmicks. I was on my way with my car in record time.

DealerRater Mar 16, 2022

Always on time, and exactly what’s needed. They take great care with all they put their hand to!

DealerRater Feb 20, 2022

Ivery in service has been awesome, honest and straight forward. I recommend DeMariis GMC to everyone! Jimmy Anderson of Woods bay Montana

DealerRater Jan 13, 2022

Jeff at the Mercedes dealer ship was awesome. The repair got us back on the road in no time. Very clean waiting area Thanks again.

DealerRater Dec 28, 2021

They always give great service! The waiting area is very comfortable! They always answer any question I have about my car.

DealerRater Dec 11, 2021

Awesome customer service! The gal that checked me in was amazing! Will be back because of her!!! Thank you!!

DealerRater Dec 10, 2021

Colin was very good to communicate with and did a great job keeping us informed the best he could in this uncertain climate of auto production. We were quite pleased with him.

DealerRater Nov 18, 2021

Rob was great to work with making purchase as smooth as possible. Scott was also a pro in getting us through the title process and payment side.

DealerRater Oct 24, 2021

East reliable fast and great people Will most certainly continue to use them. Very pleased

DealerRater Oct 14, 2021

Wayne was extremely friendly and the process went very well. I would go back again anytime.

DealerRater Oct 6, 2021

Good service. Kept me informed of what was happening and expected costs. Appreciate the option to have a loaner car while service is ongoing

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