Semi Truck and Trailer Repair in the Rio Grande Valley
For an owner-operator or a small fleet, a truck that isn't rolling is costing money every hour. Call to reach a local shop that works on semis, work trucks and trailers in McAllen, Edinburg, Brownsville and nearby Valley towns.
If you're stopped on the road, get as far from traffic as you safely can and turn on your hazard lights. In an emergency, call 911 first.
Call a local diesel shop
Trucks and trailers
Shops in the Valley work on a range of heavy equipment. Tell the shop what you drive:
- Tractors and semis, day cabs and sleepers.
- Work trucks: dump trucks, box trucks, flatbeds and service trucks.
- Trailers: dry vans, reefers, flatbeds and tankers.
Not every shop does every job. Ask whether they handle your make, your engine and your type of trailer.
Common repairs
- Engine and fuel system: hard starts, low power, smoke, injectors, turbo. See diesel engine repair.
- Brakes and air system: air leaks, slow air build-up, worn brakes, slack adjusters.
- Electrical: dead batteries, wiring, lights and the sensors the engine computer relies on.
- Emissions parts: DPF, EGR and the DEF system, repaired so they work as designed.
- Cooling and A/C: overheating, coolant leaks and cab air conditioning, which matters in the Valley summer.
- Suspension, steering and wheel ends.
- Trailer repairs: lights, brakes, landing gear, doors and floors.
Running out of DEF, or a DEF warning
When the truck's sensors say the diesel exhaust fluid is gone, the engine cuts power in steps. The EPA says that under current software, speed can drop to 5 mph within about four hours, and a failed sensor can cause the same thing even with DEF in the tank. In August 2025 the EPA asked engine makers to update software on existing trucks to soften these derates, so ask the shop whether an update is available for your engine.
Your annual inspection
Under federal rules (49 CFR 396.17), every commercial motor vehicle, and each unit in a combination, must pass a periodic inspection at least once every 12 months, with proof on the vehicle. Commercial vehicles in Texas also still need a passing state safety inspection, according to the Texas DPS. Not every shop can do these: the federal inspection has to be done by an inspector who meets the FMCSA's qualifications. Ask before you go. Full details in annual truck inspection in Texas.
What repairs cost a trucking business
Repair and maintenance is one of the biggest costs of running a truck. The American Transportation Research Institute (ATRI) puts it at 40.4 cents per mile for 2025, out of a record $2.336 per mile to operate a truck. Each job is priced on its own: parts, labor hours and whether it's done at the shop or on the road. The shop will confirm the price before any work. More in diesel repair costs in the RGV.
What a truck shop checks
- What the driver saw: warning lights, codes, sounds, when it started.
- A scan of the engine and aftertreatment systems.
- A walk-around of brakes, air lines, tires, lights and the trailer if it's hooked up.
- A written estimate with parts, labor and how long the truck will be down.
- The repair and a road test.
Urgent or can it wait?
Stop and call now for loss of air pressure, a red stop-engine light, overheating, heavy smoke, a fuel leak or anything that affects brakes or steering.
Book soon for a yellow warning light, a slow air build-up, a small oil leak or an inspection coming due.
Before you authorize the work
- Get the estimate in writing, with parts, labor and an expected finish time.
- Ask if parts are new or remanufactured.
- Ask about warranty on parts and labor, in writing.
- Ask how the shop will reach you if the repair grows once the truck is opened up.
Truck repair across the Valley
Local shops serve trucks in:
- McAllen, Pharr and Mission
- Edinburg, San Juan and Weslaco
- Brownsville, Harlingen and San Benito
Stuck where you are? See mobile and roadside diesel repair.
Semi truck repair FAQ
Do you work on trailers too?
Calls go to independent local shops, and many of them work on trucks and trailers. Tell the shop what you need when you call.
Can a shop do my annual inspection?
Some can. The federal inspection must be done by someone who meets the FMCSA's inspector qualifications, and Texas commercial vehicles also need a state safety inspection. Ask the shop if they do both. See the inspection guide.
How long will my truck be down?
It depends on the repair and on parts. Ask for an expected finish time with the estimate, and ask the shop to call you if it changes.
My truck is in limp mode. Can I drive it to the shop?
If it's safe, drive slowly to a safe spot off the road and call. If a red warning light is on, stop and ask for roadside help instead of driving it in.
Truck down?
Tell the shop where the truck is, what it is and what it's doing.