Quick facts — Diesel Truck Repair, Dallas TX (Salazar Semi-Truck Repair Inc.):
- What we fix: engine, fuel, cooling, air brakes, electrical/charging, suspension & steering, A/C, and DPF/DEF emissions.
- Engines: Detroit (DD13/DD15/DD16), Cummins (ISX/X15/X12), CAT, International.
- Diagnostics: dealer-level software — DiagnosticLink, Insite, Premium Tech Tool. We find the root cause, not a parts cannon.
- Service: in-shop and roadside. Same-day whenever possible. Free inspection, written quote first. Parts & labor warranty.
- Where: 2323 Chalk Hill Rd, West Dallas — off I-30, I-20, I-35 & Loop 12. Call 214-761-9082. Hablamos español.
Diesel Truck Repair in Dallas, TX — Salazar Semi-Truck Repair Inc.
When your diesel truck goes down, every minute off the road cuts into your bottom line. At Salazar Semi-Truck Repair Inc., truck owners and fleet managers across Dallas–Fort Worth trust our team for fast, reliable, transparent diesel repair that restores power, performance, and uptime.
Our diesel technicians work daily on Cummins and Detroit, engines. From dealer-level diagnostics to full overhauls, every repair is handled with the right tools, quality parts, and total transparency. We don’t guess — we find the root cause, fix it right, and get your truck back to work the same day whenever possible.
When to Stop the Truck Immediately
Most issues let you schedule a repair. A few can turn a fixable problem into an engine or brake failure if you keep driving. Pull over safely and call us if you see any of these:
- Low oil pressure warning or the oil light — keep driving and the engine can seize. Stop now.
- Coolant temperature in the red or steam from the hood — don’t try to “make it to the next exit” on a climb.
- Air-pressure buzzer or brakes that feel soft / slow to charge — this is a safety-critical stop.
- Hard engine derate or 5-mph limp mode — the ECM is protecting the engine; get off the road safely.
- Loud knocking or a new metallic noise — internal damage in progress.
If you’re down anywhere on the DFW corridors, call 214-761-9082 — we run in-shop and roadside repair and can arrange a tow.
Systems We Service & Replace — and What Usually Fails
We’re a one-stop diesel shop. Here’s every major system we repair, the heavy-duty failure we see most on DFW trucks, and where to go deeper:
| System | What we service / replace | Common heavy-duty failure | Learn more |
|---|---|---|---|
| Engine | Block, pistons, crank, cam, turbo, head gaskets, overhead | EGR cooler leak (DD15), cam-follower/injector wear (X15) | Diesel Engine Repair |
| Fuel | High-pressure pump, injectors, lines, filters | Low rail pressure, metal contamination from pump wear | Engine & Fuel |
| Cooling | Radiator, thermostat, water pump, fan clutch | Overheating, internal coolant loss via EGR cooler/water pump | Radiator / Cooling |
| Emissions (DPF/DEF/SCR/EGR) | NOx sensors, DEF doser, DPF, EGR, forced regen & reset | Engine derate, low SCR efficiency, DEF crystallization | Exhaust / Emissions |
| Air brakes | Pads, drums, valves, tanks, air dryer | Low air pressure, saturated dryer cartridge, leaks | Air Brake Repair |
| Electrical / charging | Battery, alternator, starter, terminals | No-start, low system voltage in cold mornings | In-shop diagnostics |
| Suspension & steering | Leaf springs, shocks, kingpins, tie rods, axles, alignment | Wander, uneven tire wear, kingpin play (DOT OOS) | Suspension · Alignment |
| A/C | Compressor, condenser, evaporator, recharge | Blows warm in Texas heat, compressor failure, leaks | A/C Repair |
Every repair is backed by our parts-and-labor warranty — protection on both, not one or the other.
Symptom | System | Likely Cause | What We Do
Here’s how the most common diesel complaints map from what the driver sees to what actually gets fixed:
| Symptom | System | Likely cause | What we do |
|---|---|---|---|
| Overheating / coolant loss, no puddle | Cooling / EGR | EGR cooler or water pump | Pressure & combustion-gas test, replace, purge |
| Check engine + power derate | Aftertreatment | NOx sensor / doser / DEF quality | Diagnose, repair, forced regen, reset inducement |
| Low power + black smoke | Air / turbo | VGT actuator stuck / boost leak | Actuation test, replace turbo/actuator, calibrate |
| Oil light / knock | Engine internal | Bearing or oil-pump wear | Stop, inspect, repair before further damage |
| Air buzzer / slow to charge | Air brakes | Saturated dryer / air leak | Replace cartridge & purge valve, leak test |
| No-start / dim lights | Charging | Alternator / batteries | Load test, replace, clean terminals |
Dealer-Level Diagnostics — We Find the Root Cause
The fastest way to waste a fleet’s money is to replace parts that weren’t broken. We run dealer-level diagnostic software — DiagnosticLink (Detroit), Insite / Guidanz (Cummins), and Premium Tech Tool (Volvo/Mack) — to read live data, confirm the driver complaint, and isolate the failed component before we touch anything. Then you get a free inspection and a written quote, and work only starts after you approve it.
Why Dallas Drivers & Fleets Choose Us
- Heavy-duty only. Class 7 & 8 is what we do every day — not cars between trucks.
- 30+ years on the Dallas corridors. If it runs I-30, I-20, I-35 or Loop 12, we know it.
- Root-cause repair. Dealer-level diagnostics so the same failure doesn’t come back next week.
- Warranty on parts and labor. Protection on both.
- Transparent. Free inspection, written quote, no surprises.
- Fleet-ready. Priority bay access, scheduled PM, predictable costs.
Serving Dallas–Fort Worth Fleets & Owner-Operators
Our shop sits on Chalk Hill Rd in West Dallas with quick access from I-30, I-20, I-35 and Loop 12. We service fleets and independents running out of Dallas, Fort Worth, Irving, Grand Prairie, Arlington, Garland, Mesquite, Carrollton, Farmers Branch, DeSoto, Duncanville, Lancaster, Hutchins, Wilmer, and the Alliance / DFW Airport freight corridors — in-shop and roadside.
FAQs — Diesel Truck Repair in Dallas, TX
Most diesel truck repairs are completed the same day, depending on parts availability and the issue. Urgent cases receive priority bay access at our Dallas shop.
Yes. We service all major diesel engine brands including Cummins, Detroit, CAT, and International, following OEM procedures and using high-quality parts for every repair.
Absolutely. Our Fleet Maintenance Plans keep fleets compliant, maintained, and road-ready with regular inspections, preventive maintenance, and priority service scheduling.
Yes. Every customer gets a free visual inspection and a detailed written quote before any work begins — so you know the number before we touch the truck. No hidden costs.
Yes. Parts and labor are both backed by our warranty for the stated term. If a covered repair issue reoccurs, we fix it at no additional cost.
Stop the truck as soon as it is safe and call us. Driving with low oil pressure, a temperature in the red, or a hard derate can turn a repair into an engine replacement. We can arrange towing and provide fast repair at our Dallas facility.
Yes. We provide in-shop and roadside semi-truck repair across the Dallas–Fort Worth corridors — I-30, I-20, I-35 and Loop 12. Call 214-761-9082 and tell us what the truck is doing and where it’s down.
It depends on the system and the failure — and we never guess. You get a free inspection and a written quote before any work starts, so you approve the number first. Call 214-761-9082 for a same-day estimate.
Yes. We diagnose and repair aftertreatment faults at the root — DPF, DEF/SCR dosing, NOx sensors and EGR — then perform the forced regen and reset so the derate doesn’t come back the next day.
Yes. We use dealer-level diagnostic software across Detroit, Cummins, PACCAR and Volvo platforms to find the root cause instead of throwing parts at the problem — that’s what keeps repeat failures down.
Written and reviewed by the diesel technicians at Salazar Semi-Truck Repair Inc., Dallas, TX, based on in-shop and roadside repairs performed on Class 7 & 8 trucks across the DFW freight corridor.
Get Back on the Road — Fast, Fair & Trusted in Dallas, TX
Don’t let downtime cost you deliveries.
Visit Salazar Semi-Truck Repair Inc. or call today to schedule your repair. Hablamos español.