Commercial Truck Repair Services in Charleston, SC
Mobile heavy-duty truck repair, diagnostics, fleet preventive maintenance, aftertreatment, roadside, and electrical service options for Charleston-area trucks and equipment.
Service Note
Not every problem needs the same response
A roadside breakdown, an electrical fault, and a failed regen each need a different fix. We diagnose the actual problem first, then point you to the right service — instead of guessing or throwing parts at it.
Services we handle
Schedule service
Call or text Lowcountry Diagnostics when a truck, fleet unit, or piece of equipment needs on-site diesel support.
Not sure what you need?
If you know something is wrong but aren't sure where to start, call and describe the problem. We'll tell you what service fits best, what to expect on-site, and what questions to ask before authorizing a repair.
Mobile truck diagnostics and repair
Diagnostic troubleshooting and practical repair support at your location.
Aftertreatment / DPF / DEF diagnostics
DPF, DEF, SCR, NOx sensor, regen, and derate troubleshooting.
Fleet preventive maintenance
Preventive maintenance planning, scheduled PM service, inspection documentation, DOT readiness checks, and diagnostic support.
Roadside diesel repair
Responsive support for trucks and equipment that cannot wait for shop scheduling.
Diesel electrical diagnostics
No-starts, charging systems, wiring, module communication, and sensor faults.
Construction and generator equipment
Diesel equipment support for job sites, generators, and work trucks.
Serving Charleston and surrounding areas
Lowcountry Diagnostics provides mobile commercial truck repair and diagnostics in Charleston, North Charleston, Mount Pleasant, Summerville, Goose Creek, Hanahan, Ladson, and Moncks Corner. Call or text (843) 310-0995 to discuss your truck, fleet, or equipment issue.
Clear Communication
Findings, options, and next steps you can act on
You should not have to guess what was checked, what failed, or what happens next. We explain the findings, the likely cause, the repair direction we recommend, and any follow-up items worth watching or scheduling.