Professional Diesel Truck Repair Serving Sunnyvale, TX

When your semi truck or trailer breaks down in Sunnyvale, you need help fast. Big Sarge Diesel Repair provides 24/7 mobile roadside assistance to keep you moving. We serve drivers throughout Sunnyvale and the surrounding Dallas-Fort Worth area with fast, affordable repairs that get you back on schedule.

24/7 Mobile Service for Semi Trucks and Trailers

Our mobile service brings the shop to you, whether you’re stranded on I-635, dealing with a breakdown along Highway 80, or parked at a local truck stop. We handle everything from tire repairs and computer diagnostics to aftertreatment systems and coolant leaks. You don’t have to worry about finding a tow or losing a full day waiting at a shop.

Why Drivers in Sunnyvale Choose Our Service

Local drivers count on us because we understand the urgency of every breakdown. Here’s what sets us apart:

We Come to You: Our mobile units are fully equipped to handle repairs on-site, saving you towing fees and downtime.

All Major Brands: We service all major brands of semi trucks and trailers, so you get the same quality repair no matter what you drive.

Transparent Pricing: You’ll know the cost before we start work. No surprises, no hidden fees.

Preventative Maintenance: Regular inspections and maintenance help you avoid costly breakdowns during peak hauling season.

Available Around the Clock: Breakdowns don’t wait for business hours. Neither do we. Call anytime, day or night.

Comprehensive Truck and Trailer Repair Solutions

We handle the full range of diesel truck and trailer issues. Our technicians arrive prepared with diagnostic equipment, replacement parts, and the experience to solve problems quickly.

Computer diagnostics pinpoint engine trouble codes and electrical issues so you’re not guessing what’s wrong. Tire repair services cover both truck and trailer tires, including emergency roadside tire changes and flat repairs. If you’re dealing with a fuel emergency, we provide fuel delivery to get you going again.

Our aftertreatment repair service addresses DPF and DEF system failures that can leave you stranded. We also fix trailer roof leaks before they damage your cargo, repair semi truck coolant leaks to prevent engine overheating, and provide truck lockout service when keys are lost or locked inside.

Every repair is performed with attention to safety and reliability. We know that your livelihood depends on your equipment running properly.

Serving Sunnyvale and Nearby Communities

We proudly serve drivers in Sunnyvale, Mesquite, Garland, Forney, and throughout the eastern Dallas metro. Our mobile units respond quickly to calls in industrial areas, along major highways, and at truck stops throughout the region.

Sunnyvale sits at the crossroads of major freight routes, which means heavy truck traffic and increased wear on diesel engines and trailer components. Summer heat can strain cooling systems and tires, while winter weather creates challenges for fuel systems and batteries. Our team knows these local conditions and comes prepared for the most common seasonal issues.