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


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.

AutoTrim Billings & CarNu New Location NOW OPEN!


AutoTrim Design of Billings is smiling ear to ear! Why, you might ask? We just moved into our brand new, state-of-the-art facility and showroom at 2951 King Ave West, in Billings MT! The new facility offers a more convenient location for customers, a larger accessory show room, and state of the art equipment to make sure your vehicle projects are done correctly and efficiently!

In addition, our new AutoTrim facility has added another important element with the absorption of Billing’s premier vehicle cleaning and restoration business; CarNu Detailing Center! CarNu Detailing Center can do it all, from car and truck details all the way up to boat and RV cleaning and detailing. Call Renee at 406-655-8580 or visit CarNu on the web at http://www.autotrimbillings.com/carnu-detailing-center.


For over 30 years, Auto Trim Design in Billings, Montana has been providing our customers with the best selection in truck accessories, as well as creating any designs you need using the talent of our highly skilled graphics staff. Not only does AutoTrim specialize in making your vehicle look good, but we excel at giving you the best deal on your parts while providing you with superior customer service. If you want to change your vehicle’s style, now is the time. AutoTrim Design in Billings in here to provide you with the widest selection of vinyl decals, graphics and accessories locally.

Our goal is to leave our customers satisfied; from our selection in parts and accessories, to professional installation on your vehicle. We have thousands of happy customers who’ll attest to our dedication to service. With our new warehouse FULL of accessories and parts, we should have what you’ll need and ready to go!


If you’re in the neighborhood, please stop by our location at 2951 King Ave West in Billings, Montana 59102, or call us at 406-656-6200 for all of your AutoTrim Design needs. Check us out on the web, browse our massive online accessory catalog, or discover new ideas at www.autotrimbillings.com, or call Todd at 406-656-3947.


  • Cadillac Tire & Wheel Protection & GAP Coverage! | Rimrock GMC Cadillac
    Your Cadillac sets a new standard in excellence and you want to keep it that way. If you hit a covered road hazard, the Cadillac Tire & Wheel Protection plan will replace your damaged tires and wheels and get you back on the road. Accidents happen and when they do, you want to be covered. […]