Whether you’re headed out hunting for the first time of the season, or packing up the family for a road trip, there’s no need to give up modern comfort and convenience.

Need more power? Let’s Fix That.

With an Onan generator purchased or serviced at Ulmer’s Auto, you can let the sounds of the creek wash your troubles away and see where you’re going when you go grab that midnight snack. Our friendly and knowledgeable staff at can guide you into making the best purchase for your needs, or provide parts and servicing you can trust on your existing generator, to ensure your adventure runs as smoothly as planned.

We are your #1 Choice for Onan Generators in Great Falls, MT and Surrounding Area

We are an authorized Cummins distributor with integrity, quality and service that speaks for itself. At Ulmer’s, we understand the value of great service. Our staff is educated in the sales and service of Onan generators and are eager to help.

Generator Maintenance and Service: Power Up and Claim Comfort!

Properly maintaining and servicing your Cummings Onan generator is essential to ensuring the longevity of your system. We make it easy to care for your generator by providing the knowledge and skill to keep it continuously running and efficient.

We Service and Sell:

  • Commercial Mobile Generators
  • Portable Generators
  • Recreational Vehicle Generators
  • Light Commercial Generators
  • Home Standby Generators

We can also help you search for hard-to-find Onan Generator parts (we may just have them), just ask.

How long has it been since your Cummings Onan generator has been serviced?
Is yours operating at peak efficiency? Find out now!

Contact us or call 406-761-1111 today to ensure your generator is in peak shape!