Owner-Operated
15+ Years Experience
Harmon Diesel is a mobile diesel repair service built on one principle: direct, experienced, and honest work from the person actually doing the repair.
When you call, you are not routed through a shop — you are speaking directly with the technician.
Work Directly With the Technician
When you call, you are working directly with the person diagnosing and repairing your equipment.
- No middlemen
- No miscommunication
- No service writers
- No internal handoffs
- No waiting behind other technicians
- No communication breakdowns
Certifications & Experience
- 15+ years OEM dealership experience
- ASE certified (T2 Diesel Engines & T8 Preventative Maintenance Inspection)
- International Master Certified
- Peterbilt Master Certified
- Allison Transmission certified (1000/2000 & 3000/4000 series)
- DOT Annual Inspection Certified
- Cargo Securement Inspection Certified
- Cummins trained
- Eaton trained
Mobile Service To Eliminate Downtime
Traditional shop repair often means delays, scheduling bottlenecks, and lost time waiting for diagnosis.
Mobile service removes those delays by bringing the repair directly to your location.
Mobile service removes those delays by bringing the repair directly to your location.
- On-site diagnostics
- Reduced downtime
- Faster repair turnaround
No Guesswork. No Shortcuts.
Every repair follows a simple standard:
- Diagnose accurately
- Repair only what is necessary
- Communicate clearly
- Stand behind the work
