When your truck goes down, so does your business. At McCallon’s Diesel Services, we provide reliable, full-service diesel truck repair for drivers and fleets across the St. Louis Metro, St. Charles County, Lincoln County, and Warren County. Our certified diesel technicians have the experience and tools to handle everything from preventative maintenance to complex repairs—keeping your trucks running strong and your deliveries on time.
Complete Truck Repair Solutions
We offer a wide range of truck repair services to keep you on the road:
- Engine Diagnostics & Repair – fast, accurate troubleshooting and dependable engine fixes
- Transmission & Drivetrain – clutch work, rebuilds, and drivetrain service
- Electrical & Lighting – wiring, alternators, batteries, and lighting repairs
- Brakes & Suspension – inspections, replacements, and upgrades for safe hauling
- Heating & A/C – HVAC service to keep drivers comfortable year-round
- DOT Inspections – compliance checks to keep your trucks road-legal
- Trailer Repair – full service for brakes, lights, axles, and bodywork
Fleet & Owner-Operator Services
Whether you manage a fleet of trucks or own a single rig, we provide the same high-quality service. For fleet managers, we offer preventative maintenance programs and detailed service records to reduce downtime and improve long-term performance.
Emergency Roadside Assistance
Breakdowns don’t always happen near the shop. That’s why we offer 24/7 roadside assistance—delivering mobile truck repair services when and where you need them most.
Why Trust McCallon’s Diesel?
✔ Experienced diesel mechanics with years of heavy-duty expertise
✔ Service for all makes and models of diesel trucks
✔ Fast turnaround to get you back on the road
✔ Transparent pricing and honest recommendations
✔ Locally trusted throughout the St. Louis Metro
Schedule Your Truck Repair Today
When you need dependable truck repair, count on McCallon’s Diesel Services to deliver. Call us today to book your repair or request roadside service.