Semi Truck Repair Services in Denver, CO & Kalispell, MT

Iron Buffalo provides full-service diesel and equipment repairs in Denver, CO, and Kalispell, MT. We repair Class 8 trucks, RVs, construction equipment, and commercial fleets with precision and speed.

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Our Semi Truck Repairs in Denver, CO and Kalispell, MT

At Iron Buffalo, we handle heavy-duty repairs for semi trucks, trailers, and equipment across all industries. From drivetrains and brakes to HVAC, hydraulics, and electrical systems—our certified techs do it all. Whether in-shop or mobile, we deliver expert repairs built to last.

FAQs

What Types of Trucks Do You Repair?

We service Class 8 semis, vocational trucks, boom trucks, dump trucks, RVs, and other diesel-powered vehicles. Our semi truck repairs are tailored to all makes and models, including Freightliner, Peterbilt, Kenworth, and International.

Do You Repair Heavy Equipment?

Yes. We provide diagnostics and repairs for construction and agricultural equipment, including excavators, bulldozers, loaders, skid steers, and tractors. We service hydraulic systems, engines, and powertrain components.

Can You Perform Electrical Repairs?

Absolutely. We handle full electrical diagnostics, battery and alternator testing, lighting systems, fuse panels, wiring harnesses, and troubleshooting for warning lights and control modules.

Do You Work on HVAC Systems?

Yes. Our HVAC repair services include blower motor replacement, A/C recharging, heater core service, and climate control diagnostics. We restore comfort for cabs and sleeper units.

What Emissions Repairs Do You Offer?

We provide EGR, DPF, SCR, and DEF system diagnostics and repairs. From forced regens to sensor replacement and full aftertreatment servicing, we keep your system compliant and efficient.

Can You Rebuild Engines or Transmissions?

We do both. Our technicians perform full diesel engine rebuilds, transmission and clutch replacements, and powertrain overhauls. All work is done to OEM specifications using quality components.

Are Mobile Repairs Available?

Yes. We offer 24/7 mobile truck and equipment repairs. Our mobile units can handle brakes, electrical issues, coolant leaks, suspension work, and more—directly on-site or roadside.

Need Semi Truck Repairs in Denver, CO and Kalispell, MT? Contact Us Now

Need professional semi truck repairs? Call Iron Buffalo at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). From in-shop service to 24/7 mobile repairs, our team is ready to get you back on the road.

In-House Diesel Mechanic Repairs

Workmanship & customer service are the cornerstones of our truck repair services. We proudly provide top-rated heavy-duty truck repair & maintenance services from our team of trusted diesel mechanics at Iron Buffalo Truck & Trailer in Denver, CO & Kalispell, MT. From brake and axle repairs, to transmissions and diesel engines, Iron Buffalo will get your commercial truck fixed and running smoothly again. Get in touch with us today to schedule a diesel mechanic repair service at one of our truck repair shop locations.

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Truck Hydraulic Repair

Hydraulic Repair

Hydraulic failure can stall your operations fast. Iron Buffalo delivers expert hydraulic repair for heavy-duty trucks and equipment—on-site or in-shop—to restore power, pressure, and performance.

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RV Repair

RV Repair

Keep your RV road-ready with expert service from Iron Buffalo. We provide complete RV repair and maintenance solutions to ensure safety, comfort, and reliability—no matter where your journey takes you.

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Truck Powertrain Replacement Service

Powertrain Replacement

When your engine, transmission, or drivetrain reach the end of their life, Iron Buffalo delivers complete diesel powertrain replacement services to restore performance and extend vehicle longevity.

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Truck Engine Conversion Service

Engine Conversion

Upgrading your powertrain starts with the right diesel engine conversion. Iron Buffalo offers expert engine swap services for heavy-duty trucks, ensuring performance, compatibility, and long-term reliability.

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Truck Electrical Repair

Electrical Repair

Electrical issues in heavy-duty trucks can lead to no-starts, warning lights, and lost productivity. Iron Buffalo provides advanced diagnostics and electrical repairs to keep your truck’s systems functioning safely and reliably.

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Truck Suspension Repair

Suspension Repair

A strong suspension system protects your truck and cargo from damage. Iron Buffalo delivers expert suspension repair for heavy-duty trucks to keep your rig stable, safe, and road-ready.

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Truck Transmission and Clutch Repair

Transmission and Clutch Repair

Dealing with slipping gears or a grinding clutch? We're here to help. Iron Buffalo provides expert transmission and clutch repair for heavy-duty trucks to keep your driveline smooth, responsive, and road-ready.

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Truck Brake Repair

Brake Repair

Safe braking is critical for heavy-duty trucks. Iron Buffalo delivers expert brake repair services for commercial vehicles to ensure your fleet stays compliant, responsive, and road-ready at all times.

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Truck Driveline Repair

Driveline Repair

Driveline issues lead to vibration, noise, and power loss. We deliver expert heavy-duty driveline repair services to keep your truck operating at full strength with smooth, safe, and efficient power transfer.

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Truck Engine Repair, Rebuild, and Overhaul Service

Engine Repair, Rebuild, and Overhaul

From minor diesel engine repairs to full overhauls, Iron Buffalo provides expert solutions to restore performance and extend service life. You can count on us to minimize downtime for your heavy-duty commercial trucks.

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Truck HVAC System Repair

HVAC System Repair

We offer professional HVAC repair and replacement for heavy-duty trucks, ensuring peak heating and cooling performance year-round. A reliable HVAC system keeps drivers safe, alert, and comfortable.

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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
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