Accurate Mobile Diesel Diagnostics & Fleet Maintenance in Charleston, SC

Lowcountry Diagnostics helps commercial fleets and truck owners reduce downtime with accurate troubleshooting, on-site preventive maintenance, clear repair direction, and heavy-duty truck service across the Charleston area.

Call (843) 310-0995 Request Service

Charleston Mobile Light, Medium, and Heavy-Duty Truck Repair — 24/7 On-Site Service

Reviews & Social

Google reviews & Facebook updates

Customer feedback and recent posts from Lowcountry Diagnostics.

View Google Profile

Lowcountry Diagnostics

How We Work

Clear diagnostics. Clear communication. A repair direction you can act on.

Review the reported issue

Verify the fault

Test before replacing parts

Explain findings clearly

Recommend the next step

Document follow-up items

View Services Fleet Preventive Maintenance

What We Do

Our Services

For owner-operators, small commercial fleets, contractors, delivery trucks, service trucks, and local businesses that need reliable heavy-duty support where the truck is sitting.

Mobile Diesel Diagnostics & Repair

On-site diagnostics and repair for commercial trucks and diesel equipment.

Aftertreatment / DPF / DEF Diagnostics

DPF, DEF, SCR, NOx, regen, and derate troubleshooting.

Fleet Preventive Maintenance

Preventive maintenance and support plans for local fleets.

Emergency Roadside Diesel Repair

Practical roadside support when the truck cannot wait.

Electrical & No-Start Diagnostics

Wiring, batteries, charging, starting, ECM and sensor diagnostics.

Construction & Generator Equipment

Diesel-powered jobsite equipment and generator support.

Based in Charleston, SC

Heavy truck repair that comes to the truck

Some repairs belong in a shop. A lot of diagnostics do not. We can meet you at the yard, terminal, roadside location, or job site and help determine whether the truck can be repaired on-site or needs a deeper repair plan.

Call Us Now

Why customers call us

Testing before parts replacement
Service at the yard, job site, roadside, or customer location
DPF, DEF, SCR, NOx, electrical, no-start, and derate troubleshooting
Clear repair direction before parts get thrown at it

Service Areas

Charleston
North Charleston
Mount Pleasant
Summerville
Goose Creek
Hanahan
Ladson
Moncks Corner

Need service now?

Call or text Lowcountry Diagnostics for mobile commercial truck repair in the Charleston area.

(843) 310-0995
Joseph@lowcountrydiag.com

Recent Repair Photos

A look at the repairs we make

Scroll through real field photos from Lowcountry Diagnostics. From A/C repairs and electrical work to hydraulic, liftgate, and heavy-duty truck service, this is a snapshot of the work we handle.