Fleet Mobile Services
We bring the shop to you. Our fully equipped mobile service trucks come to your yard, job site, or anywhere your equipment is parked.
Overview
What We Do
H&H Diesel Services provides professional mobile diesel repair and on-site fleet service for commercial trucks and heavy equipment. Our mobile service trucks are fully equipped to handle diagnostics, electrical repair, aftertreatment troubleshooting, PM services, fuel system repair, and minor heavy-line repairs directly at your yard, jobsite, or roadside location. With OEM-level diagnostic software and more than 22 years of heavy-duty experience, our technicians deliver fast, accurate repairs that keep your fleet operating with minimal downtime.
Why It Matters
Every hour a truck sits idle costs your operation money. Towing a commercial vehicle adds expense and delays that compound quickly across a fleet. Mobile diesel repair eliminates those costs by bringing certified technicians and professional-grade equipment directly to your location — whether that's a truck yard in Seguin, a construction site outside San Antonio, or a breakdown on I-10 near Corpus Christi. Fast on-site service means less downtime, lower repair costs, and more trucks earning revenue on the road.
On-Site Diagnostics
We bring our diagnostic laptops and scan tools to your location. Fault codes, sensor failures, and ECM issues can often be diagnosed and resolved without ever moving the truck.
Fluid & Filter Service
Oil changes, fuel filter replacements, coolant service, and DEF system maintenance performed at your yard on your schedule — not ours.
Minor Repairs
Belts, hoses, batteries, lights, air lines, and other roadworthy repairs handled on-site so your trucks pass inspection and stay compliant.
Fleet PM Programs
We work with fleet managers to build a preventive maintenance schedule around your operation. Regular mobile visits mean fewer surprises and more uptime.
Service Area
Based in Seguin, TX — we regularly service fleets in San Antonio, New Braunfels, San Marcos, Lockhart, Gonzales, and surrounding South Texas counties.
Emergency Dispatch
Mobile units are also available for emergency callouts when a truck goes down in the field. Call us and we'll get a tech rolling as fast as possible.
Ready to Get Started?
Let's Get Your
Truck Back on the Road
Call us or send a message and we'll get you scheduled fast. No runaround, no upsell — just straight answers and solid work.