El Flaco
Truck & Trailer Repair
24/7 mobile & shop diesel repair serving Los Fresnos, Brownsville & the entire Rio Grande Valley. Fast, affordable, reliable.
What We Fix
Complete truck & trailer repair — engine to kingpin, bumper to bumper
Engine & Powertrain
- Complete engine overhaul
- Fuel system & injector service
- DPF/EGR/aftertreatment
- Turbocharger rebuild
- Transmission & clutch
Cummins, Detroit, CAT, PACCAR.
Brakes & Air Brakes
- Air brake leak repair
- Brake adjustment & calibration
- ABS diagnostics & repair
- Drum/rotor service
- S-cam & slack adjuster
#1 DOT violation — we make sure yours pass.
Electrical & Lighting
- Battery & starter diagnostics
- Alternator replacement
- Full wiring troubleshooting
- DOT lighting compliance
- Headlamp restoration
OEM diagnostic tools for every platform.
Trailer Repair Specialty
- Landing gear repair & replacement
- Kingpin & fifth wheel service
- Trailer door repair & alignment
- Trailer lighting & wiring
- Tandem slider repair
- Crossmember & floor repair
Full trailer service — flatbed, reefer, dry van, tanker.
Tire Services
- Tire inspection & replacement
- Roadside tire change
- TPMS diagnostics
- Emergency tire blowout
- DOT tread verification
Fast roadside tire service — we come to you.
PM & DOT Inspections
- PM Service packages
- Oil & filter changes
- Annual DOT inspections
- CSA score consultation
- Violation repair & re-inspection
Pass DOT the first time or we re-inspect free.
24/7 Emergency & Roadside Service
Mobile roadside repair • Emergency towing coordination • Tire blowouts • Jump starts • On-site diagnostics
Stranded on US-77 or anywhere in the Valley? We'll be there in 2 hours or less.
Computer
Diagnostics
OEM-level diagnostic scanners that pinpoint issues fast. No guesswork — we find the exact problem so you only pay for what needs fixing.
Full ECM/ECU Scanning
Read & clear fault codes across engine, transmission, ABS, aftertreatment
Live Data Monitoring
Real-time sensor readings: boost pressure, EGT, fuel rail, DEF quality
DPF Regen & Reset
Force regen, reset aftertreatment counters, clear derate conditions
Parameter Programming
Speed limiters, idle shutdown, PTO config, injector calibration
JPRO & OEM Software
Commercial vehicle diagnostics on-site. No tow needed — we diagnose where you are.
Why Choose El Flaco
Perfect 5.0 Rating
38 Google reviews and every single one is 5 stars. That's not luck — that's consistency.
Open 24/7
Day, night, weekends, holidays. Your truck breaks down at 3 AM? We answer.
Fast & Affordable
2-hour roadside response. Reliable and affordable — exactly what truckers need.
Se Habla Español
Fully bilingual. We explain what's wrong in plain language so you understand every repair.
Brands We Service
Truck Manufacturers
Engine & Component OEMs
Our Work
What Truckers Say
38 Google Reviews — every single one is 5 stars
“I was stuck on the side of the road and contacted him, within 2 hours I was already rolling with my semi truck. He is pretty fast and reliable and his prices are very affordable. I recommend him to anybody.”
“Excellent service! I want to thank you for doing an excellent job repairing my Kenworth T680.”
“Fast and decent prices. Gets to the problem and explains the process and what needs to be done.”
Contact El Flaco
Phone — 24/7
(956) 509-3263Address
1905 Cortezville Rd, Los Fresnos, TX 78566