Makes We Work On
We focus on commercial and work-truck diesel platforms — heavy-duty, medium-duty, vans, and fleet trucks. Light-duty pages cover work-truck use, not consumer car service.
Mobile diagnostics, repair, and fleet maintenance for light-duty, medium-duty, and heavy-duty commercial vehicles across the Charleston area.
Commercial Vehicle Support
Light, medium, and heavy-duty makes supported
Lowcountry Diagnostics works with commercial trucks, service vans, delivery vehicles, fleet units, diesel equipment, and specialty vehicles. Our focus is accurate diagnostics, clear repair direction, and practical on-site service when the job can be handled in the field.
We service a wide range of brands commonly used by local fleets, contractors, delivery companies, owner-operators, and service businesses.
Heavy-Duty Trucks
- Freightliner
- International
- Kenworth
- Peterbilt
- Mack
- Volvo
- Western Star
- Sterling
Medium-Duty Trucks
- Isuzu
- Hino
- Freightliner M2
- International MV / Durastar
- Ford F-650 / F-750
- Chevrolet Medium Duty
- GMC Medium Duty
Light-Duty Commercial
- Ford Super Duty
- Ram 2500 / 3500 / 4500 / 5500
- Chevrolet Silverado HD
- GMC Sierra HD
- Mercedes-Benz Sprinter
- Ford Transit
- Chevrolet Express / GMC Savana
Engines & Systems
- Cummins
- Detroit Diesel
- CAT
- International / Navistar
- Power Stroke
- Duramax
- Mercedes-Benz Diesel
- DPF / DEF / SCR Aftertreatment
Make-Specific Service Pages
Looking for service on a specific make or model?
We've put together detailed service pages for the most common commercial van and truck makes we work on in the Charleston area. Each page covers the specific models we service, common failure points, and what to expect from a mobile service call.
Not just parts replacement
Diagnostics before guesswork
Different makes have different failure patterns, wiring layouts, aftertreatment strategies, and service access. We review the reported issue, verify the failure, check the system involved, and explain the next practical repair direction before parts are thrown at the truck.
Need help with a truck or fleet unit?
Call or text Lowcountry Diagnostics for mobile diesel diagnostics, fleet maintenance, and commercial truck repair in the Charleston area.