Diesel Diagnostic & Repair

10/13/2026

10/11/2026

Is your diesel engine overheating under heavy loads? Proper diagnostics test the entire cooling system to find the real cause.

10/11/2026

A diesel engine that runs at a normal temperature around town but overheats while climbing grades, hauling a heavy load, or operating under sustained demand is telling you something important. https://tinyurl.com/5hc63t4f

10/03/2026

Testing diesel fuel pressure at idle misses hidden problems. Advanced load testing pinpoints the true issue to save on costly part replacements.

10/03/2026

A diesel engine can appear to have normal fuel pressure while idling and still develop serious fuel-delivery problems on the road. https://tinyurl.com/ycx3r5rz

09/30/2026

Pennsylvania Official State Inspection Station

We’re Proud to Be an Official Pennsylvania State Inspection Station!

Diesel Diagnostic & Repair is officially authorized by the Pennsylvania Department of Transportation (PennDOT) to perform Pennsylvania state safety inspections.

We provide professional inspection services to help keep your vehicle safe, road-ready, and compliant with Pennsylvania requirements.

✅ Pennsylvania State Safety Inspections
✅ Official PennDOT Inspection Station
✅ Certified Inspection Professionals
✅ Professional Truck & Trailer Service
✅ Inspection & Repair Services Available at One Location

Whether you need your truck, trailer, or other eligible vehicle inspected, our experienced team is here to help identify safety concerns and explain any repairs that may be needed.

📍 Diesel Diagnostic & Repair
4881 Pittsburgh Road, Harrisville, PA 16038
📞 (814) 786-3700

Your vehicle. Your safety. Our expertise.

Proudly serving Harrisville, Butler County, and Northwestern Pennsylvania.