
Mobile & roadside repair
24/7 roadside service: highway shoulders, truck stops, yards and job sites.
See what's included →Broken down on the highway or stuck at the yard? The Diesel Doc brings the shop to you: roadside diesel repair and welding for semis, trailers, pickups and heavy equipment, 24 hours a day, across Del Rio and surrounding areas.
What we do
From an 18-wheeler on US 90 to a pickup in a ranch yard, one call handles the job start to finish. We diagnose it where it sits and fix the common failures on the spot.

24/7 roadside service: highway shoulders, truck stops, yards and job sites.
See what's included →
Check-engine lights, codes, power loss and no-starts, diagnosed where the truck is sitting.
See what's included →
Air leaks, brake chambers, slack adjusters and lines, so you pass and keep rolling.
See what's included →
Mobile welding on trailers, frames, brackets and equipment, done right where it broke.
See what's included →Heavy-duty specialists
Diesel is the core of what we do, on semi trucks, medium-duty trucks, trailers and the equipment that keeps Del Rio working.

Check-engine lights, drivability issues, power loss and full diesel engine diagnostics.
Starting and charging systems, batteries, wiring and lighting problems.
Air leaks, brake chambers, valves and lines, repaired roadside when it is safe to do so.
DEF faults, derates and aftertreatment warnings that leave a truck limping.
Overheating, coolant leaks, blown hoses and belts, fixed before they cost you an engine.
Cracked brackets, trailer frames, hitches and equipment welded on site, so a broken mount doesn't end the trip.
We come to you
When your truck can't make it to a shop, the shop comes to you. Our service truck carries the tools and common parts to get trucks, trailers and equipment moving again, on the shoulder, at the truck stop or in the yard.
Regional coverage
The Diesel Doc is based in Del Rio and runs mobile repair across Val Verde County. We respond to highway breakdowns, truck stops, yards, ranches and job sites.
Give us the highway and the mile marker and we will tell you straight whether we can reach you and when.
Where we work
Why choose us
You hear on the phone whether it is a roadside fix, how long until we arrive, and what happens next.
Service body, crane and compressor ride with the truck, so most jobs finish where they started.
Trucks do not break on a schedule. The same number answers at 2 AM and at noon.
How it works
No forms to fight with when you are stuck on a shoulder with traffic going by.
Tell us the truck, the symptom and where you are.
A straight answer on the fix and the ETA.
The service truck comes to you with tools and parts.
Back on the road, or a clear plan for what is next.
Answering now
A real person answers and a truck gets assigned. In a live lane? Call, don't type.
(432) 308-6013 Call nowDel Rio's 24/7 mobile diesel repair. We come to you.