At AS Truck Repair & Towing LLC in Rancho Cucamonga, CA 91739, we specialize in expert truck engine diagnostics and repair, ensuring your vehicle runs smoothly and reliably. Our advanced services are designed to keep your truck performing at its best, minimizing downtime and maximizing efficiency for both light and heavy-duty vehicles.
Cutting-Edge Engine Diagnostics
Engine issues can be complex, but our state-of-the-art diagnostic tools pinpoint problems with precision. Using advanced scanning technology, we analyze your truck’s engine control unit (ECU) to identify issues like misfires, fuel system errors, or sensor malfunctions. Whether you’re dealing with warning lights on your dashboard or reduced performance on I-15, our certified technicians in Rancho Cucamonga deliver accurate diagnostics to get to the root of the problem quickly.

Comprehensive Engine Repair
Once diagnosed, our skilled team tackles repairs with expertise and care. From replacing faulty injectors to rebuilding entire engines, we handle everything from minor fixes to major overhauls. Common repairs include addressing turbocharger failures, cooling system issues, and exhaust system malfunctions. We use high-quality parts that meet or exceed OEM standards, ensuring durability and compliance with DOT regulations. Our goal is to restore your truck’s power and efficiency, keeping you on the road longer.
Fast, Reliable Service
We know every minute off the road costs you. That’s why we offer prompt, efficient service at our Rancho Cucamonga shop or through our mobile repair unit, bringing solutions directly to you. Our transparent pricing and clear communication ensure no surprises, just top-notch service.
For trusted truck engine diagnostics and repair in Rancho Cucamonga, CA 91739, contact AS Truck Repair & Towing LLC at (909) 808-2845 today!