19 mobile services · 24/7
Mobile Diesel Repair Services in Knoxville, TN
Everything a mobile diesel mechanic can do for your semi truck, 18-wheeler, or heavy-duty work truck without a tow. Semi truck repair, trailer repair, and diesel diagnostics — on the shoulder, at the truck stop, or in your yard.
Roadside & Emergency
For the truck that just quit — on an interstate shoulder, in a truck stop lot, or at a customer’s dock.
Emergency Roadside Assistance
Round-the-clock breakdown help around Knoxville. No-starts, air leaks, blowouts, derates, and warning lights handled where the truck stopped.
See what’s includedMobile Truck Repair
Engine, air, electrical, and chassis repairs done where the truck is parked — your yard, a truck stop, a jobsite, or the shoulder.
See what’s includedMobile Tire Service
Blowouts and flats on steer, drive, and trailer tires. Commercial tire changes on the shoulder, at the truck stop, or in your yard.
See what’s includedJump Start & Fuel Delivery
Dead batteries, empty tanks, and cold-weather no-starts. Heavy-duty jumps, battery testing, and diesel brought to the truck.
See what’s includedLockout Service
Keys on the seat and the door shut — maybe with the engine running? We get you back in the cab without breaking glass.
See what’s includedEngine, Emissions & Electrical
Dash lights, derates, overheating on the grades, and cold-morning no-starts — diagnosed and fixed at the truck.
Diesel Engine Diagnostics
Check-engine light, derate, or fault codes? We plug in at the truck and tell you what failed and whether it’s safe to keep driving.
See what’s includedDPF, DEF & Regen Service
Aftertreatment faults, DEF derates, loaded DPFs, and regens that won’t finish. Parked regens on site when allowed, plus sensor and DEF repairs.
See what’s includedFuel System Repair
Fuel restriction, gelled fuel, air in the lines, leaks, and hard starts. Filters, water separators, lift pumps, and lines repaired on site.
See what’s includedCooling System & Radiator Repair
Overheating on a grade, coolant leaks, blown hoses, broken belts, and bad fan clutches. Cooling repairs on site before heat ruins the engine.
See what’s includedTruck A/C Repair
East Tennessee summers are hot and sticky. A/C compressor, condenser, blower, and refrigerant leak repairs at your truck.
See what’s includedElectrical & Charging Repair
Dead batteries, bad alternators, failed starters, lights out, and corroded wiring. Electrical diagnosis and repair at your truck.
See what’s includedBrakes, Air & Chassis
Air brakes, air lines, hydraulics, suspension, and driveline — the systems inspectors look at first.
Air Brake Service
Air leaks, brakes out of adjustment, dragging or locked brakes, and low-air warnings. Air brake repair on tractors and trailers.
See what’s includedSuspension & Driveline Repair
Blown air bags, broken springs, bad shocks, U-joints, driveshafts, and wheel seals. Chassis and driveline repairs done on site.
See what’s includedHydraulic Hose & Air Line Repair
Blown hydraulic hoses on dump trucks, wet kits, roll-offs, and liftgates, plus air line and fitting leaks. Hoses replaced on site.
See what’s includedTrailer, Reefer & Welding
Dry vans, reefers, flatbeds, dump bodies, and the steel that holds them together.
Trailer Repair
Dry vans, reefers, flatbeds, and lowboys. Trailer brakes, lights, air lines, landing gear, doors, and suspension fixed where the trailer sits.
See what’s includedReefer Unit Repair
Reefer won’t start, won’t hold temp, or throwing alarms? Mobile refrigeration unit repair for Thermo King and Carrier Transicold units.
See what’s includedMobile Welding
Cracked brackets, broken mounts, trailer crossmembers, dump bodies, and bumpers. Welding and fabrication brought to your truck, trailer, or jobsite.
See what’s includedFleet & Compliance
Annual inspections and scheduled maintenance done in your yard, so trucks stay on the road.
DOT Inspection
Annual DOT inspections and pre-inspection checkups at your yard. Find and fix defects before a roadside inspector does.
See what’s includedFleet Preventive Maintenance
PM service at your yard: oil, filters, lube, and inspections on schedule — plus winterizing before the first freeze.
See what’s includedNot sure what’s wrong?
That’s normal. You don’t need to know which service to ask for. Call and describe what the truck is doing — the lamps on the dash, the noise, the smell, or what happened right before it quit. Dispatch will figure out what kind of help to send, starting with diagnostics when the cause isn’t obvious.