At Harmon Truck Service, we understand the critical role of diesel trucks and fleets in our economy. Our preventive maintenance services are designed to keep your diesel trucks and fleets running smoothly and efficiently.

Understanding Preventive Maintenance
Why It Matters
Preventive maintenance refers to the regular and systematic inspection, detection, and correction of potential failures before they develop into major defects. For diesel trucks, this is crucial. It's not just about fixing problems; it’s about foreseeing them.
Key Components of Preventive Maintenance
- Engine Health: The heart of your diesel truck is its engine. Regular oil changes, air filter replacements, and fuel filter changes are essential. We monitor engine performance, looking for any signs of wear and tear.
- Transmission Care: Your truck's transmission is complex. Regular checks and fluid replacements ensure gears shift smoothly and potential issues are caught early.
- Brake Systems: We don't have to tell you how vital brakes are. Our services include pad replacements and ensuring the entire braking system functions correctly.
- Tire Maintenance: Tires are where your truck meets the road. We provide tire rotations, pressure checks, and tread inspections to ensure safety and fuel efficiency.
- Electrical Systems: In today's trucks, electrical systems are more sophisticated than ever. We check battery health, wiring, and other electrical components to prevent unexpected breakdowns.
Areas We Serve
While we're based in Sullivan, MO, our services extend to various locations, ensuring a wide range of clients benefit from our expertise. These areas include Bourbon, MO; Cuba, MO; Clayton, MO; St. Peters, MO; Chesterfield, MO; Lebanon, MO; and Glenallen, MO.
Fleet Management Services
For businesses operating multiple vehicles, our fleet management services are a game-changer. We provide comprehensive care for your entire fleet, ensuring each vehicle adheres to the highest maintenance and safety standards.
- Customized Service Plans: Every fleet is unique. We tailor our maintenance plans to suit your needs, considering factors like mileage, usage, and vehicle type.
- Record Keeping and Scheduling: Keeping track of maintenance schedules can be daunting. We simplify this process with meticulous record-keeping and timely reminders for upcoming services.
The Harmon Truck Service Difference
- Expertise and Technology: Our team of seasoned professionals uses the latest tools and technology to diagnose and address issues efficiently and effectively.
- Customer-Centric Approach: We believe in clear communication and transparent services. Our clients are our partners, and their satisfaction is our top priority.
- Proactive Solutions: By focusing on preventive maintenance, we aim to minimize downtime and costs associated with major repairs. We don't just fix problems; we prevent them.
Schedule Your Preventive Maintenance Services Today
At Harmon Truck Service, we pride ourselves on providing top-tier preventive maintenance for diesel trucks and fleets. Our comprehensive services, dedication to customer satisfaction, and proactive solutions make us the go-to choice for diesel truck maintenance in Sullivan, MO, and surrounding areas. Contact us today to ensure your fleet runs efficiently and reliably.

