Why Rimrock Auto Group?

Rimrock 20 Years

Rimrock Auto Group is the largest auto group in southern Montana as such we have the largest selection of new and used vehicles available to you today.

Come experience the 'Rimrock Way'! With our friendly, knowledgeable staff. You'll be happy you did.

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Your One Stop for Everything Automotive

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Whether you're looking for a new truck, a used car, service, parts, the latest accessories or anything in between, Rimrock Auto Group has it.

Since we're the largest group in our area, we've got the vehicle that you need at a price you can afford. Call today at 406-651-5000

Welcome to Rimrock Auto Group in Billings, Montana. Your Low Price Leader, Dedicated to Family Service!
With 3 seperate dealerships and 4 manufacturers under the Rimrock Auto Group banner, new and used selection is second to none.
  • New Inventory: Pick from brand new GMC, Subaru, Cadillac and Kia vehicles right off the showroom floor.
  • Used Inventory: Used inventory is changing all of the time, if we don't have what you want, we'll find it!

Welcome to Rimrock Auto Group

Rimrock Auto Group, treats the needs of each individual customer with paramount concern. Being one of the largest Auto Groups in the region, selling GMC, Cadillac, Subaru, Volkswagen, Kia, and Mercedes-Benz, we know that you have high expectations, and as your primary Montana car dealer we enjoy the challenge of meeting and exceeding those standards each and every time. Allow us to demonstrate our commitment to excellence!

Our experienced sales staff is eager to share its knowledge and enthusiasm with you. We encourage you to browse our online inventory, schedule a test drive and investigate financing options. You can also request more information about a vehicle using our online form or by calling (866) 694-4116.

If you don't see a particular vehicle, just send us your info, we will gladly inform you when a matching car arrives. If you'd like a see a vehicle in person, click on Dealership: Directions for step-by-step driving instructions to that dealership, or give us a call. We look forward to serving you! Please checkout all of our dealer site links at the top of the page or below.

State-of-the-Art FREE Vehicle Inspection

A FREE Vehicle Inspection Now Available at Rimrock GMC Cadillac! But wait…this isn’t your average inspection, this is a state-of-the-art, comprehensive vehicle diagnosis! Watch the video to learn what all is covered, and why it’s making headlines in the Montana automotive community! www.rimrockgm.com

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  • GMC Wins AutoPacific Top Popular Brand Award | Rimrock GMC Cadillac
    DETROIT – GMC was named Highest Satisfaction Popular Brand and the Sierra and Acadia took top honors in the light-duty pickup and large crossover SUV categories in AutoPacific’s 18th annual Vehicle Satisfaction Awards. “Vehicles that score highest in the Vehicle Satisfaction Awards are delivering value and satisfaction across a wide range of attributes,” sai […]
  • The Subaru WRX S4 on the way? | Rimrock Subaru
    Is there a new, high(er) performance Subaru WRX on the way? Well…yes! Today Fuji Heavy Industries, LTD, the maker of Subaru cars, announced that a new WRX model is on the way to Japanese markets August 25th, and expected to be released to the rest of the world afterward. It is called the WRX S4! […]