Kenworth in Denver, CO and Kalispell, MT

Kenworth trucks deliver performance and style—but even the best rigs need service. We provide expert Kenworth truck repair, diagnostics, and mobile support to keep your fleet moving forward.

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Colorado

Montana

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

Our diesel technicians are fully equipped to handle repairs across the Kenworth lineup, from the sleek T680 to the classic W900. We use OEM-grade diagnostic tools to pinpoint performance issues quickly—whether you're facing emissions system faults, powertrain trouble, or electrical failures. With both in-shop and 24/7 mobile service, we keep your Kenworth on the road and ready for the next mile.

Kenworth Repairs and Services

We offer a complete range of services to support the full lifecycle of your Kenworth truck. These include:

PACCAR MX-13 and MX-11 engine diagnostics and repair
T680, W900, T880, and T370 model service
Electrical diagnostics and control module reprogramming
Brake system inspection and repair
Suspension and steering alignment
DPF, SCR, and EGR emissions system service
HVAC diagnostics and repairs
Transmission, clutch, and PTO service
Preventive maintenance and DOT inspection prep

We support fleet operators and independent drivers with precision repairs and fast turnaround times.

Benefits of Kenworth Trucks

Kenworth trucks are designed for efficiency, performance, and driver comfort. With aerodynamic models like the T680 and rugged builds like the W900, Kenworth meets the needs of both over-the-road and vocational operations.

Their PACCAR engines deliver impressive torque, fuel economy, and uptime. Inside the cab, advanced driver assistance systems and customizable dash layouts provide a superior operating experience. The durability of Kenworth chassis and components makes them a long-term investment that holds value—and reduces lifecycle costs.

Need Kenworth Repair Service?

Experiencing issues with your Kenworth? Call Iron Buffalo at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). Our certified diesel techs will keep your truck running at peak performance.

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 Kenworth Models Do You Repair?

We service all Kenworth models including the T680, W900, T880, T370, and older Class 8 platforms with PACCAR or Cummins powertrains.

Can You Perform PACCAR Engine Diagnostics?

Yes. Our technicians use OEM-grade tools to diagnose and repair PACCAR MX-13 and MX-11 engines, including emissions systems and performance tuning.

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