We bring the shop to your truck.
On-site diagnostics, repair, tires and DOT inspections across the Charleston area and the corridor north to I-95. No tow. No shop wait. No lost days — because trucks don’t make money sitting.
Downtime is the enemy. We kill it.
We come to you
Your truck gets fixed in your lot, at the jobsite, at the truck stop, or on the shoulder — not sitting on a shop’s jack stands waiting for a bay to open up.
Back in service faster
Most of what puts a truck down on the road is a few hours of work, not a few days. Skipping the tow and the shop queue is usually the difference between losing an afternoon and losing a week.
Box-truck specialists
Liftgate service and roll-up door repair done mobile. Most heavy-duty shops won’t touch these on-site and most box-truck shops aren’t set up for the road. We do both.
Fleet-ready paperwork
Real invoices, per-vehicle service history and inspection records that hold up in a DOT audit and drop straight into your maintenance file.
What actually happens when you call
No portal, no ticket queue. A phone call, a location, and a truck on the way.
You call and tell us where you are
Interstate and direction of travel, nearest exit or mile marker, and what the truck is doing. If you’re in a yard, the address and the gate. That is enough to start rolling.
We tell you straight what the wait is
You get a real number, not a stall. If we’re two hours out, we say two hours out so you can decide whether to wait on us or call someone closer. Nobody wins when a driver sits on a promise that was never good.
The truck shows up stocked
Air lines and fittings, brake parts, filters, belts, batteries, lighting, tires and the diagnostic laptop are already on board. Most calls get finished on the first trip instead of turning into a parts run.
You leave with the paperwork
An itemized invoice and, when it applies, the inspection or repair record for your file. Fleets get it consolidated instead of a shoebox of receipts from ten different shops.
On-site repair for trucks, box trucks & fleets
The work that actually puts trucks back on the road — done where the truck is sitting.
Roadside & Emergency
Breakdowns on I-26, I-95 and I-526. Air leaks, no-starts, overheating, blown lines, lost lights. Roadside truck repair →
Tires
Roadside tire replacement for tractors, trailers and box trucks, new and used casings. Mobile tire service →
Brakes & Air Systems
Shoes, drums, chambers, slack adjusters, air leaks and governor problems. Truck brake repair →
DOT Inspections
Annual and brake inspections done at your yard, on your schedule. Fleet & DOT inspections →
Trailers & Liftgates
Trailer lights and wiring, liftgate hydraulics and controls, roll-up doors. Mobile trailer repair →
Diagnostics & Electrical
Check-engine and derate faults, charging and starting problems, sensors and wiring. Diagnostics & electrical →
Preventive Maintenance
Mobile oil and filter service, greasing, cooling system work and scheduled PMs at your yard.
Pre-Purchase Checks
Buying a used truck? Know what you’re getting before the money moves.
Run a fleet? Start with a DOT inspection.
Legally required, quick, and it gets a real mechanic under every truck you own. Ask about per-vehicle maintenance plans with priority breakdown response.
Our mobile service truck — the shop that comes to you
A fully stocked mobile shop: air, diagnostics, lifting, tire service and parts — on the truck that comes to you.
What the service truck carries
A mobile truck is only as good as what is bolted to it. Ours is built around the calls that actually come in on this corridor — air system failures, tires, brakes, lights and no-starts — so the common repairs get finished on the first trip instead of turning into a parts run to North Charleston and back.
- Air and brake stock — air line, fittings, glad hands, brake chambers, slack adjusters, shoes and drums for the common heavy-duty patterns.
- Tire service — the equipment to break down and mount a commercial tire on the shoulder or in a yard, plus new and used casings in the sizes that move.
- Diagnostics — laptop and adapters for reading engine, ABS and aftertreatment faults on the roadside instead of guessing at what the dash light means.
- Power and lighting — batteries, cables, starters, alternators, marker and stop lamps, and the wiring to make a trailer legal again.
- Lifting and support — jacks and stands rated for loaded heavy-duty equipment, so the work gets done safely on uneven ground.
- Fluids and filters — oil, coolant, DEF, fuel and air filters for scheduled PM work done at your yard.
What is not on the truck is a tow bill. If a repair genuinely belongs in a shop, we will tell you that too — but most of what strands a truck on I-26 does not.
Why a tow is usually the expensive part
When a truck goes down away from home, the default reflex is to call a wrecker. Sometimes that is right. Often it is the single most expensive decision in the whole event, and it happens before anyone has looked at the truck.
A tow on a heavy-duty unit means a hook, a haul, and a spot in somebody else’s queue. The repair itself might be forty-five minutes of work. Meanwhile the load is late, the driver is out of hours in a shop parking lot, and the truck is now sitting somewhere nobody planned for it to be. Add a second tow if the shop turns out not to want the job.
Mobile repair skips the hook entirely. The tech comes to the truck, diagnoses it where it sits, and in most cases fixes it there. An air leak, a blown line, a chamber, a set of shoes, a tire, a starter, a trailer light problem, a sensor throwing a derate — all of it is roadside work when the truck that shows up is stocked for it.
The honest version: a tow is the right call when the frame, the driveline or the engine internals are involved, or when the truck cannot be worked on safely where it stopped. That is a smaller share of breakdowns than most dispatchers expect. Call first and find out which one you have before the wrecker is rolling.
Owner-operators, fleets, and everybody in between
Owner-operators
One truck, no backup, every hour down is your money. You get the same dispatch line and the same stocked truck as a twenty-unit fleet, and a straight answer on what the wait is.
Local & regional fleets
Box trucks, straight trucks and tractors running the Lowcountry. Scheduled PM at your yard on your downtime, plus priority response when something breaks mid-route.
Plants, yards & construction
Mixers, dumps, rolloffs and yard equipment at cement plants, quarries, ports and jobsites — where the equipment cannot leave and a shop visit means losing the day.
Dispatch & breakdown desks
Working a driver you cannot see, in a state you are not in. Call us directly, get a real ETA and an itemized invoice, and put the truck back in service without a tow authorization.
Charleston, and the whole corridor north to I-95
One Charleston base, mobile coverage from the port terminals to the I-26/I-95 junction and the I-95 segments either side of it.
Most breakdowns on this stretch do not happen in a town. They happen at a mile marker, on a ramp, at a scale, or in a plant yard where the equipment cannot leave. So we cover it the way a driver describes it: by interstate, direction and exit.
I-26 from the Charleston port terminals out through North Charleston, Ladson, Summerville and Ridgeville, past the Harleyville weigh stations, to the I-95 junction at Exit 169 and on toward Bowman and Orangeburg. I-95 north and south of that junction — St. George at Exit 77, Harleyville and Bowman at Exit 82, Holly Hill at Exit 93, Santee at Exit 98. I-526 across North Charleston, Hanahan and into Mount Pleasant for the Wando Welch Terminal drayage runs on Long Point Road.
Off the interstate we run to yards, terminals and plants across Charleston, Berkeley, Dorchester and Orangeburg counties — Goose Creek, Moncks Corner, Mount Pleasant and the industrial parks in between.
What to tell us so the truck rolls faster
If you are stopped on the interstate, start here and we can be moving while you are still talking:
- Which road and which direction — I-26 east, I-95 north, I-526 west. Direction matters as much as the road; the wrong side of a divided highway is a long way around.
- Nearest exit number or mile marker — drivers know exits, not town names, and so do we. “Just past 177” is better than “somewhere near Harleyville.”
- What the truck is doing — won’t build air, won’t crank, dash light and code if you have one, tire position, smoke, noise, leak and where it’s coming from.
- Loaded or empty, and what you’re hauling — it changes how we jack it, whether we can work the side you’re parked on, and how urgent the load is.
- Tire size and position if it’s a tire — steer, drive or trailer, inside or outside, and the size off the sidewall.
- Where you actually are if you’re not on the highway — yard address, gate number, and whether there’s a guard shack.
Call (854) 205-1972 any hour. If you are on a shoulder, get the truck as far right as it will go, triangles out, and stay out of the traffic side while you wait.
What drivers say after the call
“Fleet Doc was absolutely fantastic to work with! They came out to us and worked on our Freightliner right on-site, which was incredibly convenient and saved us the hassle of getting a big diesel truck to a shop.”
“I broke down on a scorching hot day, and I was stuck with no idea what to do next. They just happened to be in the same area, and without me even having to beg for help, they offered to assist. They gave me a jump-start, treated me with genuine kindness, and made sure I was good before heading out.”
“Saved my life getting my Peterbuilt back on the road ASAP! Great service.”
Mobile truck repair questions, answered
Do you offer 24/7 roadside truck repair in Charleston, SC?
Yes. Fleet Doc runs 24/7 mobile and roadside service for diesel trucks, box trucks, trailers and fleets across Charleston, North Charleston, Summerville, Mount Pleasant, Goose Creek and the surrounding counties, including the I-26 and I-95 corridor. Call (854) 205-1972 any time.
What areas does Fleet Doc serve?
We work out of Charleston and cover the full I-26 corridor from the port terminals to the I-95 junction, plus the I-95 segments north and south of it. That includes Charleston, North Charleston, Hanahan, Ladson, Goose Creek, Moncks Corner, Summerville, Mount Pleasant, Ridgeville, Harleyville, St. George, Bowman, Holly Hill, Santee and Orangeburg.
What types of trucks do you work on?
Class 6 through Class 8 — tractors, trailers, dump trucks, mixers, box trucks and straight trucks. Diesel is the core of the work, and we handle the trailer and liftgate side that a lot of heavy-duty shops will not.
How fast can you get to me?
Inside the Charleston metro, typically 30 to 60 minutes once a truck is rolling. Out on the corridor it is usually 45 to 90 minutes depending on the town, the time of day and what is already in front of us. You will get a real number on the phone, not a stall.
Is mobile truck repair more expensive than taking it to a shop?
On the total event, usually not. A shop visit for a truck that is already down means a heavy-duty tow, a wait in someone else’s queue, and a driver parked the whole time. Mobile repair skips the tow and the queue. The comparison that matters is not the hourly rate, it is what the truck being down actually costs you for the day.
Can you do a DOT inspection at our yard?
Yes. We do annual and brake inspections on-site, so your trucks are not driving somewhere and waiting for a lane. You get the inspection record for each unit for your maintenance file.
Do you repair liftgates and roll-up doors on box trucks?
Yes, and it is one of the things we are known for. Liftgate hydraulics, pumps, motors, switches and controls, plus roll-up door panels, rollers, cables and springs — done mobile at your yard or on a route stop.
Can you replace a semi truck tire on the side of the highway?
Yes. We carry commercial tire service on the truck, with new and used casings in the sizes that move on this corridor. Give us the position (steer, drive or trailer, inside or outside) and the size off the sidewall and we will bring the right one.
My truck is throwing a derate. Can that be fixed on the roadside?
Often, yes. We read the actual fault codes on the roadside rather than guessing from the dash light. Sensor, wiring, DEF and aftertreatment faults are frequently roadside repairs. If it turns out to be something that genuinely belongs in a shop, we will tell you that instead of running the clock.
Do you offer fleet maintenance programs?
Yes. Per-vehicle maintenance plans with scheduled PM at your yard, consolidated invoicing and priority response when a truck goes down mid-route. Start with a DOT inspection on the fleet and we will build the schedule from what we find.
Do you work on the port drayage runs and in the terminals?
We cover the I-526 corridor and the roads around the Charleston terminals, including the Long Point Road approach to Wando Welch in Mount Pleasant and the North Rhett and Remount Road routes in North Charleston and Hanahan. Terminal gates have their own access rules, so tell us on the phone whether the truck is inside the gate or outside it.
How do I request mobile truck repair?
Call (854) 205-1972 for anything urgent — a breakdown is a phone call, not a form. For scheduled work, PM, or a fleet inspection, use the request form and we will get you on the calendar.
Broke down or due for service?
Send it over and we’ll get you scheduled.