Billion Auto Group

(25 reviews)
Visit Billion Auto Group
Sales hours: 8:00am to 6:00pm
Service hours: 7:30am to 5:30pm
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Sales Service
Monday 8:00am–6:00pm 7:30am–5:30pm
Tuesday 8:00am–6:00pm 7:30am–5:30pm
Wednesday 8:00am–6:00pm 7:30am–5:30pm
Thursday 8:00am–6:00pm 7:30am–5:30pm
Friday 8:00am–6:00pm 7:30am–5:30pm
Saturday 9:00am–5:00pm 9:00am–12:00pm
Sunday Closed Closed
New (406) 551-4310 (406) 551-4310
Used (406) 551-9962 (406) 551-9962
Service (406) 551-9971 (406) 551-9971


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About our dealership

This seller has been on since August 2020.
Locally owned and operated for over 35 years. New franchises include Buick Chrysler Dodge GMC Jeep Nissan and Ram. Largest selection of quality pre-owned and certified pre-owned in southwest Montana. Our Service departments have ASE certified technicians that can work on all makes and models offering OEM as well as the largest selection of Magneti Marelli parts in the region. We are your one stop shop for all of your automotive needs including a fully certified body shop detail shop and car wash. You can even install auto glass in or accessorize your vehicle through our Onsite Auto Glass shop. Nobody beats a Billion Experience
Nobody Beats a Billion Deal. Nobody!

Service center

Phone number (406) 551-9971

Service hours



(25 reviews)

A dealership’s rating is calculated by averaging its lifetime reviews. Includes reviews from DealerRater

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It really is a great day at Billion

They answer the phone "It's a great day at Billion" and it really is. Everyone there is very nice and friendly. I just had three cars serviced, snows swapped out, oil changes, etc. They also did major repairs for serious problem I had with a brand new pickup purchased from a different dealer and did an excellent job. I will note that the reviews that complain about the wait at "Express Service" are probably not incorrect. I appreciate the express service because I don't need an appointment and just drop the car off, and I'll get a call sometime before the end of the day - I never hang out and wait for the car to be done. It's a good practice in life and time management to never depend on something happening at a scheduled time if it can be avoided, and its very frustrating to wait for something and have an unproductive day.


Jeep 2014

Very good service and nice people. Dont have anything bad to say just getting this review done so they would stop bothering me about it



Worst service experience in more than 10 years doing business. 3 hrs for an EXPRESS oil change. At 1.5 hours asked how much longer and was told 1 more. Why didn't you tell us at beginning, " you didn't ask". Shame on them.


Service on my car

For quick and easy oil service I would highly recommend them. Nice lounge for waiting in while car is being serviced. Everyone very friendly and professional..


Leveling Kit

Great customer service. Quick easy process. Would recommend and come back here for more accessories. Great communication to get me exactly what I wanted. Thanks again!


Service was fast and efficient.

Great experience, communication was accurate allowed me to plan a productive work day around the service. Great getting a car wash afterwards too! Definitely recommend to others.


Waiting For GadOIL

I waited for a L O N G time for them to work on my car (regular oil / lube) that could’ve been done more quickly by a “Speedy Lube” type facility.


Battery Troubles

CS got car in same day and replaced the battery in no time!

Dealer response

Thanks! We always want to hear back from our clients and we're glad you had such a positive experience with us! Thank you again for choosing J.C. Billion GMC Buick and we hope to see you again.


Terrible Horrible Rude

The service guys are the rudest I have ever met. The sale guys will not call you back. Leave their desks and treat you like you are doing them a no favors by spending 60k


Great experience

Chris over in the Nissan building is great to work with. My 1st choice of car did not work out but he found one that fit what I wanted and called me in and I purchased it. Chris is hands down the best and most personable car salesman I've ever worked with. Will be going back in future.

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