Our Factory Trained Service Techs Can Handle Your Toughest Repairs.
All years, makes and models are welcomed in our bays…no matter if you need a light bulb changed or a full engine overhaul.
We offer factory computer diagnostics for MACK and HINO trucks, and we are an authorized service center for Cummins natural gas (CNG/LNG) engines.
Our fully certified Cummins trained technicians are committed to accurate
diagnostics and providing the fastest possible repair service.
Call for more information or to make an appointment 800-472-9597
Mack Certified Uptime Centers
Keeping your business moving.

Getting you back on the road is our priority, and at our Uptime Centers you can expect:

- High-quality standards and service processes
- Updated shop layouts featuring fast lane Uptime Bays for repairs less than 4 labor hours
- Integrated communication capabilities with GuardDog® Connect and Mack ASIST for faster diagnostics and seamless repair process management
As a Mack Certified Uptime Dealer, there’s no appointment necessary. Simply roll in ready and roll out repaired.
Prompt check-in and assessment of vehicle status with initial diagnostics within two hours.
You can stay in the loop with direct communication using the optional ASIST program.
Repairs determined to take less than 4 hours are routed to dedicated UPTIME Bays preventing short jobs from waiting behind longer jobs.
Trucks requiring advanced diagnostics and repairs are routed to an Advanced Bay. As soon as information is available, you’ll be advised regarding anticipated repair time and costs.
Testimonials
One of the best service departments I have been to. Very helpful and they do a wonderful job explaining any questions that I have. Great Job Flag City– Steve Young
Flag City was more open about their service than I expected. I appreciate that.– Chris Counci
This dealerships Service Deptartment is the reason I have bought Mack trucks.– Chris Counci
I can’t say how much I appreciate Jeremy Roszman and his service team !!!!! For example when I call and explain my problem they listen put me on the list for truck pick up and let me know when they will be here. They repair the truck and deliver the truck within a couple of days. I tell you this because these services are very valuable. FLAGCITY MACK SERVICE TEAM is hands down the best !!!! – Zach Miller
The reason why my survey was perfect is because of the level of treatment I receive from Jeremy, the Service Manager. He is very professional and takes a true interest in my needs and wants. He also fits my trucks into his schedule whenever it works out best for me. Then after he gets my trucks in he gets them fixed up in a very timely matter, which is very important to myself and my operation. Flag City is truly lucky to have Jeremy on their team!– SanGregory Cartage
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