About Us

At American Commercial Truck & Trailer Repair, we specialize in professional, on-site diesel service that keeps your fleet running and your business moving. Based in Gainesville, Georgia, we provide dealer-level diagnostics and repair solutions for all major makes and models of medium and heavy-duty trucks and trailers. Our team is dedicated to delivering fast, reliable, and expert service at your location, saving you the time, cost, and hassle of towing to the dealership. With a focus on innovation and customer satisfaction, we strive to exceed expectations in every repair.

Our Services

Expert Solutions for Your Fleet

Dealer-Level Diagnostics

We use OEM-level software and diagnostic tools to provide advanced aftertreatment repairs, engine diagnostics and repair, major and minor electrical systems service, driveline, brakes, suspension, transmission and clutch service, DOT inspections, and fleet maintenance programs. Our expert solutions are tailored to meet the specific needs of your fleet.

Mobile Convenience- Onsite Repair

We offer on-site diesel repair service, bringing the shop to you for roadside assistance, scheduled fleet maintenance, and emergency breakdowns. Our mobile convenience saves you time and eliminates the hassle of towing to a repair shop.

Advanced Diagnostics & Programming

We utilize OEM-level software and diagnostic tools such as Cummins INSITE, Detroit DiagnosticLink, PACCAR Davie4, Eaton ServiceRanger, Allison DOC, WABCO, Bendix, IDSS, techtool and more to pinpoint issues accurately and fix them right the first time. We don't rely on universal software like most shops do. We have the right tools!

Aftertreatment system DPF,DEF,SCR

STOP ENGINE lamps are never fun to see. when it comes to aftertreatment issues- DOC, DPF, DEF, SCR, temp sensor, injectors, pumps, YEP! We can handle it.

Fleet Maintenance Programs- Preventive Maintenance

Our preventive maintenance programs are designed to keep trucks compliant and on the road, ensuring your fleet operates efficiently and stays in top condition.

Advance Electrical Repair

Electrical problems can bring any truck to a standstill, from minor wiring issues to complex electronic control failures. At American Commercial, we specialize in diagnosing and repairing both major and minor electrical systems, including ECMs, TCMs, ACMs, brake modules, and aftertreatment control units. Our expertise in CAN communication troubleshooting ensures that no issue goes unchecked. We understand how critical these systems are to the performance and reliability of your truck, and we use advanced diagnostic software and proven repair methods to get you back on the road with confidence.