24/7 mobile diesel & truck repair · South Texas
When your truck stops, we don't.
From ranch roads and oil fields to highways and job sites, Jonathan's Fleet Service brings the shop to you — roadside repairs, fleet maintenance, computer diagnostics and DOT inspections, any hour of the day.
- 24/7
- Always on call
- On-site
- We come to you
Why drivers call Jonathan
Straight answers. Back on the road.
We live and work in South Texas too, so we know what working trucks go through. Jonathan comes to your truck, finds the real problem and gets you moving again — without the tow bill or the wait at a shop.
“He replaced a yoke and Ujoint on our semi truck… We were patched up and back on the road in just one hour.”
Open 24/7
Nights, weekends and holidays. Breakdowns don't keep business hours, so neither do we.
We come to you
Roadside, at your yard or on the job site. No tow, no hauling the truck to a shop.
Computer diagnostics
Scan-tool diagnostics to find the real cause, plus forced regens on the spot.
Honest work
Straight talk about what the truck needs — and what it doesn't — before work starts.
Our services
Every system. Every mile.
From a roadside tire change to a stubborn electrical problem, Jonathan handles it on site with the tools and parts to finish the job.
24-Hour Roadside Truck Repair
Broken down on the highway, a ranch road or a job site? Fast mobile repairs, day or night, to get you rolling again and cut costly downtime.
Learn more 02Fleet Maintenance & Repair
One truck or an entire fleet — dependable on-site maintenance and repair at your yard, designed to reduce downtime and keep your business moving.
Learn more 03Computer Diagnostics & Forced Regens
Check-engine light, derate or regen warning? Computer diagnostics on site to find the real cause — plus forced regens where the truck sits.
Learn more 04DOT Inspections
Federal annual DOT inspections and pre-purchase inspections at your yard — an honest assessment so you stay compliant and buy with confidence.
Learn more 05Heavy-Duty Repair & Welding
Heavy-duty mechanical repairs and on-site welding for trucks, trailers and working equipment — fixed where it sits.
Learn more 06Trailer Repair
Mobile trailer repair — brakes, wheel seals, tires and welding — at the roadside, your yard or the job site.
Learn more 07Fleet Subcontracting
A subcontracted mobile mechanic for commercial fleets — for overflow, after-hours coverage or fleets without a mechanic on staff.
Learn more 08Pilot & Escort Services
Professional pilot and escort vehicles for oversized loads — safe, efficient transport across Texas and beyond.
Learn moreWe also handle
Alternators · Starters · Batteries · Ball joints · Brakes, front & rear · Clutch fans · Oil changes · Wheel seals · Rack & pinions · Rear end lubes · U-joints & CV axles · Water pumps · Roadside tire changes
How it works
One call. Back to work.
- 1
Call
Reach Jonathan directly at 210-765-2933, any hour.
- 2
Tell us what's wrong
What the truck is doing, any codes or warning lights, and where it's sitting.
- 3
We roll out
Our service truck comes to the roadside, your yard or the job site.
- 4
Back on the road
Repaired on the spot whenever possible, so you lose hours — not days.
Reviews
Drivers say it best.
Jonathan was very professional and very quick with his response and quote for the job we needed done. He replaced a yoke and Ujoint on our semi truck. We greatly appreciate his professionalism and his speedy arrival time for the job. We were patched up and back on the road in just one hour.
EXCELLENT service and fair price. Did a custom weld out of just a gasket that I had and gave solid advice. Really knowledgeable, communicative and even showed up early to address our issue. I would highly recommend to anyone with any level of auto issues. From a flat tire to advanced mechanic work, he has it covered.
Professional, Fast, Reliable, Affordable. After having a flat, I was frustrated and stranded with my kids, to also add I had 4 other services reject my request due to non availability and no one answering. I was happy Jonathan's 24 hour mobile service was available and assisted me to get home safely. I would definitely recommend this service for your auto over all needs.
Amazing customer service! Jonathan came out the same day and went above and beyond what you'd expect from a mechanic.
He gave us a fair price and didn't offer anything we didn't need.
We definitely recommend him.
I can’t begin to tell you how grateful I am for Jon and his help. My daughter found herself stranded in San Antonio late at night and we were scrambling to get her home safely. Not only did Jon come out and look at her car at 9pm, but once he found the problem and realized it couldn’t be driven, he towed the car back to us, and even delivered my daughter back home safe and sound. Made this mama’s heart so happy. 5 ⭐️ Highly recommend
I just used this mechanic and he was at my house within an hour, fixed my vehicle in less than 30 minutes and was very affordable! I was very pleased with his services and will be using him again for all my mechanical issues! Thank you!!!
I have called Jonathon several times to work on my car and he never disappoints! He is one of the best that I have used and I highly recommend! He’s honest, reliable and definitely knows his field of work! He is also affordable and will come to you as soon as possible!
Broken down? Day or night
When you're stuck, we're one call away.
Tell us what the truck is doing and where it is. Jonathan picks up 24 hours a day and rolls out to you.