Peterbilt in Denver, CO and Kalispell, MT

From diagnostics to full rebuilds, Iron Buffalo delivers expert Peterbilt truck repair. We specialize in keeping your PACCAR-powered rigs running strong—on the road, on-site, and on schedule.

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Colorado

Montana

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

Peterbilt trucks are known for power, precision, and reliability. At Iron Buffalo, we deliver professional Peterbilt truck repair in Denver, CO and Kalispell, MT, backed by factory-level diagnostics and decades of hands-on diesel experience. Whether you drive a 579 sleeper or a vocational 389, our technicians understand the full Peterbilt ecosystem—from PACCAR MX engines to advanced SmartNav electronics.

Full-Service Peterbilt Repair and Maintenance

Iron Buffalo’s Peterbilt service capabilities cover everything from basic maintenance to advanced electronic and driveline repair. We offer:

PACCAR engine diagnostics and repair
MX-13, MX-11, and Cummins engine support
Chassis and drivetrain diagnostics
Peterbilt HVAC and SmartNav system repair
Suspension and steering calibration
Brake service and ABS diagnostics
Aftertreatment system cleaning and tuning
Electrical fault detection and rewiring
DPF regeneration and SCR system service

We service every Peterbilt model using OEM diagnostic tools and best-in-class repair standards.

Benefits of Peterbilt Trucks

Peterbilt trucks stand out in the heavy-duty industry for their durability, driver-centric design, and long-term reliability. The 579 and 389 models, in particular, combine aerodynamic performance with classic styling and modern engineering.

With PACCAR powertrains, these trucks offer lightweight construction without sacrificing torque or fuel efficiency. Peterbilt cabs are designed with comfort and visibility in mind, while SmartNav and digital dash technologies streamline diagnostics and in-cab control.

Need Peterbilt Repair Service?

Need expert support for your Peterbilt? Call Iron Buffalo at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). We’ll restore performance and reliability—fast.

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 Peterbilt Models Do You Service?

We work on all Peterbilt models including the 579, 389, 367, 567, 348, and 220, across all configurations and applications.

Do You Handle PACCAR Engine Repairs?

Yes. We’re fully equipped to diagnose and repair PACCAR MX-13 and MX-11 engines with OEM-grade tooling and deep technical expertise.

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