If you own a diesel anywhere near Berea, KY, save yourself the trouble and call Preston Jones at PJ Diesel. I brought him my 2021 Silverado Duramax (L5P) and the whole experience was as good as it gets. Preston is honest and upfront with you from the first conversation. He got back to me fast every time I reached out, and the turnaround on my truck was quick. He knows these trucks inside and out, and his pricing is fair. He came in less expensive than a lot of other shops, and the work is excellent. What really sets him apart is how he treats his customers after the job is done. Any time I've wanted to pick his brain about my truck since then, he's been glad to share what he knows. My truck is running better than it ever has. I'm in Richmond, and I would've driven a lot farther than that for work this good. A reliable diesel mechanic you can trust is hard to find, and I couldn't ask for anything better. I'd recommend PJ Diesel to anyone in Madison County or beyond.

Expert Auto repair in Mount Vernon, KY
PJ Diesel serves Mount Vernon, KY from Berea. Call or text to set up a time.
- Veteran Owned
- 5 Stars on Google
- Open 24 Hours
- All Brands, Equipment & Semis
/WHAT WE DO
DIESEL REPAIR SERVICES
Complete diagnostics and repair for all brands, including equipment and semis.
Find Us From Mount Vernon
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WHAT OUR CUSTOMERS SAY
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Serving Mount Vernon
Mount Vernon is the county seat of Rockcastle County, just south of Berea along I-75 and US 25, with Renfro Valley right up the road. A lot of diesel traffic moves through on the interstate, and the county's roads climb through hills and ridges between towns. Work trucks, farm equipment and rigs here pull real loads on steep grades, and cold winter mornings can bring hard starts and gelled fuel.
Areas of Mount Vernon we serve
- I-75
- Renfro Valley
Why Mount Vernon customers need this work
Trucks that run I-75 and the hills around Rockcastle County put steady load on the turbo, cooling system, injectors and transmission. Semis and work trucks also rack up idle hours and miles that wear filters and fuel system parts. Catching a new noise, smoke or a warning light early can keep a small problem from becoming a bigger engine repair.
Recent work in the Mount Vernon area
- 01.Diagnosing a warning light and power loss on a truck that runs I-75
- 02.Fuel filter and fuel system service on a work truck
- 03.Cooling system and turbo checks on a truck that pulls weight up steep grades
Why Choose PJ Diesel for Auto repair in Mount Vernon
Mount Vernon trucks and equipment are a short run up I-75 from PJ Diesel in Berea. We handle diesel engine repair, diagnostics and diesel truck service for all brands, including equipment and semis, and we are open 24 hours, 7 days a week. Call before you head our way, tell us the symptoms, and we'll explain what we plan to check.
Mount Vernon customers choose us because we treat every project like it's our own — no upselling, no surprises, just straightforward work that gets the job done right.
Whether you live in Mount Vernon or just need a reliable team nearby, we're a short drive from Berea and happy to walk you through every recommendation before any work begins.
For drivers in Mount Vernon, PJ Diesel is a diesel-focused shop on Old US 25 N in Berea, open 24 hours, 7 days a week. We work on all brands, including equipment and semis, from Duramax and Power Stroke pickups to Cummins. We explain what we find and what the repair involves before we start. Call (859) 452-9743 and describe what your truck or equipment is doing so we can talk it through.
Services We Offer in Mount Vernon
Every service below is available to Mount Vernon customers. Click any service for full details.
Other Areas We Serve
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