Detroit in Denver, CO and Kalispell, MT

Iron Buffalo delivers expert Detroit repair. Our team works on DD13, DD15, and Series 60 engines—backed by OEM-grade diagnostics and 24/7 mobile service. You can count on us to keep your Detroit engines running smoothly.

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Colorado

Montana

Detroit Repair & Maintenance in Denver, CO, and Kalispell, MT

We provide professional Detroit repair in Denver, CO and Kalispell, MT, specializing in DD13, DD15, and Series 60 engines. Our technicians use Detroit Diesel Diagnostic Link (DDDL) to perform precise testing and troubleshooting. Whether you’re facing a derate, turbo fault, or regen failure, we identify the problem and perform repairs that last.

Complete Detroit Diesel Services

Iron Buffalo offers full repair and maintenance for all Detroit Diesel engines used in commercial trucks. Our service capabilities include:

DD13, DD15, and Series 60 engine diagnostics
Turbocharger testing and actuator calibration
One-box aftertreatment system repair
EGR and DPF system maintenance
Fuel injector replacement and fuel rail testing
ECM fault code reading, clearing, and reprogramming
Overhead valve adjustment and cam inspections
Regen troubleshooting and emissions resets
Detroit engine brake (Jake Brake) service

All repairs are performed using OEM-compliant diagnostics and quality parts to ensure durability and emissions compliance.

Benefits of Detroit Diesel Engines

Detroit engines are designed with uptime and power efficiency in mind. Found in Freightliner and Western Star trucks, DD-series engines feature advanced emissions systems, high-pressure fuel injection, and smart electronic controls.

The DD15 and DD13 are well-known for fuel economy, quiet operation, and extended service intervals. The legacy Series 60 remains a workhorse known for its simplicity and reliability. Detroit’s aftertreatment units—including the one-box DPF and SCR systems—help maintain compliance with strict emissions standards.

Need Detroit Engine Repairs?

If your Detroit Diesel engine needs expert diagnostics or repairs, call Iron Buffalo at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). We’ll restore power and performance—fast and professionally.

FAQs

What Areas Do You Serve?

We offer 24/7 mobile repairs and roadside assistance in the following areas:

Colorado: Boulder, CO; Aurora, CO; Centennial, CO; Fort Collins, CO; Greeley, CO; Georgetown, CO; Brighton, CO; Castle Rock, CO; Colorado Springs, CO; and Longmont, CO.

Montana: Whitefish, MT; Bigfork, MT; Somers, MT; Polebridge, MT; Thompson Falls, MT; Polson, MT; Rollins, MT; Libby, MT; and Eureka, MT.

What Detroit Engines Do You Service?

We service DD13, DD15, DD16, and Series 60 engines used in Freightliner, Western Star, and other commercial trucks.

Do You Handle Aftertreatment and Regeneration Issues?

Yes. We diagnose and repair Detroit’s one-box aftertreatment systems, including DPF and SCR components. We also perform forced regens and emissions resets.

How Can I Get in Touch?

If you're ready to schedule diesel repairs, call Iron Buffalo today at 303-623-7049 (Denver) or 406-890-7001 (Kalispell).

Manufacturers

Customer testimonials

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"I highly recommend this shop. I had luke a technician there do some work on my truck after a ford dealership took 6 days and failed to acknowledge my warranty on 3 leaking oil spots on my truck.Once the dealership screwed me over I took my truck here. Luke was very impressive, fast and communicative. He provided me photos. He kept me updated on everything he did. I still have a warranty through ford but apparently it’s useless. I don’t think I’ll ever go back to them considering how they treated me. Luke is a solid technician who is very skilled. I can’t recommend him enough. Thank you."

Tristen

"Our truck broke down just as we were getting into Denver. It was a major repair and they accomplished it quickly and we were back in our truck. Everyone there was very professional and nice to work with. The unhappy news of a major repair was actually a good experience. Definitely recommend Iron Buffalo."

Kelly

"I’m glad I went to this shop. I was so worried it would be another back door mechanic wanting to swindle me. It was anything but. Shannon was super kind and went way out of his way getting me in right away. And Steve was a professional from start to finish in assisting with the work being done. I’m really appreciative and would 100% use this shop again."

Kristin

"Steven Riddle is the best service writer if ever dealt with. He is very knowledgeable, I called with starting issues. With in 1hour try had my truck towed in. That day they had it diagnosed then next day they found the parts. Great job, I will be using in the future. Thanks a lot."

Mike

"Kanisha was great, I had been trying to get my small hydraulic cylinder repaired for quite some time and she was the first person that said "YES" she was honest about needing to look first. She was willing to listen and explained the process. When I came in she was polite and professional. She communicated like she said she would and got it taken car of! I'll recommend Kanisha and Iron Buffalo!"

Lance

"I'm very happy with the service I received from Iron Buffalo Holdings I highly recommend this shop. I got an Inspection & a DYNO done on my Semi Truck. Canesha was prompt and courteous."

Miko

"Had a break down with the ol’ Pete they picked up and were available l. They aren’t the cheapest but heck you get what you pay for. If you want your rig or RV fixed so you can head one down the road these guys are nice and they can almost always get done in a day if you need it."

Bryan

Light, Medium & Heavy-Duty Truck Repair Services in Denver, CO & Kalispell, MT

Trusted Diesel Repair & Fleet Services - Keeping You on the Road & Job Site

Commerce City, CO

5590 E 55th St, Commerce, City, CO

303-623-7049

Kalispel, MT

104 Rocky Cliff Lane, Unit 1, Kalispell, MT

406-890-7001