Mack Truck Repair & Maintenance in Denver, CO and Kalispell, MT

Your Mack is built to work hard, but when performance drops or warning lights flash, you need fast and reliable repairs. Luckily, our Mack repair service helps you stay productive, reliable, and always ready for the next haul!

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Colorado

Montana

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

Mack trucks are built for power and endurance—but when something goes wrong, expert service is essential. At Iron Buffalo, we provide comprehensive Mack truck repair in Denver, CO and Kalispell, MT for highway and vocational models alike. With 24/7 mobile repair services and fully equipped shops, we minimize downtime and maximize uptime for your Mack truck.

Mack Truck Repair Services

Iron Buffalo provides a full suite of maintenance and repair services for Mack’s heavy-duty truck platforms. These include:

MP7 and MP8 engine diagnostics and repair
Granite, Anthem, and Pinnacle model service
mDRIVE automated transmission repair and programming
Emissions and aftertreatment system troubleshooting
HVAC system diagnostics and climate control repair
Suspension, axle, and steering tuning
Brake system repair and ABS diagnostics
Electrical fault isolation and repair
DOT inspection preparation and preventive maintenance

We use Mack-compatible diagnostic tools to ensure accurate testing and compliant repairs.

Benefits of Mack Trucks

Mack trucks are known for their rugged construction, integrated powertrains, and rock-solid reliability. Whether you’re hauling construction materials or operating regional freight, models like the Granite and Anthem deliver torque, traction, and safety across tough conditions.

With engines like the MP8 and Mack’s proprietary mDRIVE transmission, these trucks offer efficient performance and lower operating costs. Mack’s Command Steer and advanced braking technologies further enhance control and driver confidence.

Need Mack Repair Service?

If your Mack truck needs diagnostics, repair, or maintenance, call Iron Buffalo at 303-623-7049 (Denver) or 406-890-7001 (Kalispell). We’ll restore your rig’s 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 Mack Models Do You Repair?

We service all Mack trucks, including Granite, Anthem, Pinnacle, TerraPro, and LR series, across vocational and regional platforms.

Do You Perform mDRIVE Transmission Repairs?

Yes. We provide diagnostics, reprogramming, and repair for mDRIVE transmissions, including shift issues, clutch faults, and calibration.

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

Leave a Review

"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