Commercial Truck & Trailer Repair Services in San Antonio, TX
At Truck Masters, we keep your commercial fleet moving across San Antonio, the I-35 corridor, and South Texas. Whether you need immediate 24/7 emergency roadside assistance, scheduled preventative maintenance, or heavy-duty mechanical overhauls, our certified technicians deliver fast, reliable repairs to minimize downtime and protect your bottom line.
Benefits of Choosing Truck Masters for Commercial Service
Minimized Downtime
Rapid mobile dispatch units. Efficient shop turnaround times. Your freight keeps moving and your tight delivery schedules stay protected.
Certified Heavy-Duty Mechanics
Our technicians are experienced and certified, working with advanced OEM diagnostic tools. That combination means complex diesel and trailer repairs get done right the first time.
Single-Source Fleet Maintenance
Emergency roadside tire fixes. Scheduled DOT compliance. Full shop engine overhauls. All your fleet repair needs, managed under one roof.
Tires & Wheels
Commercial Truck Wheel Alignment
We align semi and trailer axles to stop uneven tire scrub before it ruins a good set of rubber. Your truck holds its lane easier and burns less diesel.
Mobile Tire Repair
Highway blowout?
We send mobile tire service directly to your truck with new rubber, fresh treads, and heavy rim tools to get you rolling again.
Engine & Drivetrain
Computer Diagnostics
We plug into your truck’s ECM with factory-level tools to pull codes, pinpoint check engine warnings, and locate electrical bugs without the guesswork.
Engine Repair & Overhaul
From fuel injector swaps and head gaskets to complete block rebuilds, we handle full diesel engine troubleshooting and repairs for heavy rigs.
Transmission & Clutch Repair
We service manual and automatic heavy rigs. From clutch adjustments and flywheel resurfacing to complete fluid flushes, we keep your drivetrain shifting smoothly under maximum payload.
Differential & Drivetrain Service
We rebuild differentials, stop oil leaks, balance drive shafts, and replace worn U-joints to keep power moving straight to your wheels.
Brakes & Electrical
Air Brake System Service
We replace shoes, drums, valves, and compressors while fixing air leaks to keep your stopping power fully compliant and safe.
Electrical System & Battery Service
When a rig won’t crank, it usually comes down to a dead battery bank, a shot alternator, or frayed trailer wiring. We test the whole system, find where the power dropped, and swap out the dead parts so you can hit the highway again.
Inspections & Compliance
Fleet Preventative Maintenance
Changing oil, taking samples of fluids, changing filters. Multipoint inspections round it out, keeping your entire commercial fleet road-ready.
DEF System Repairs
Targeted repairs for pumps, sensors, heaters, and dosing units to keep your DEF system efficient and compliant.
Cargo Tank Inspections
Detailed tanker assessments covering valves, shells, fittings, and pressure integrity for safe operation.
DOT Safety Inspections
Avoid costly out-of-service violations. We perform complete annual and routine DOT safety checks to verify brakes, lighting, steering, and frame integrity.
AC & Comfort
HVAC & AC System Repair
Keep drivers comfortable with full cab climate repairs, including leak patches, freon recharges, compressor swaps, and heater core fixes.
Trailer Repair & Maintenance
Dry vans, reefer trailers, flatbeds, we handle full structural and mechanical repairs on all three. Door alignment, floor repairs, landing gear service included.
24/7 Roadside Assistance
Stranded on I-35 or South Texas trade routes? We dispatch fast roadside service for quick fixes.
What Sets Us Apart
Strategic Regional Hub Coverage
Positioned right along major South Texas trade corridors. We serve San Antonio, Laredo, Moore, Von Ormy, and surrounding logistics routes to keep regional freight moving.
Honest, Direct Communication
Clear pricing and straightforward estimates on every job. We communicate diagnostic findings directly so you never deal with surprise costs or hidden fees.
Full Fleet Support
On-site mobile fixes whenever possible, backed by our San Antonio, Von Ormy, and Moore shops for anything that needs full equipment.