
Manufacturer Repair | Ontario CA
At Rapid Diesel Repair, we offer comprehensive services for heavy-duty trucks, trailers, and RVs in Ontario, CA. From preventative maintenance to diagnostics, we keep your vehicles running efficiently. Call us to learn more about our expert solutions.
What’s included
A Peterbilt truck needs dependable service when every day off the road affects your schedule. Rapid Diesel Repair in Ontario, CA provides diagnostics, maintenance, and repairs for Peterbilt owner-operators and commercial fleets.
A hard start, loss of power, overheating problem, or shifting complaint can point to several systems. Our technicians investigate the symptoms and diagnose engine, transmission, clutch, and cooling concerns before recommending the work.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistWe inspect and repair brake problems and troubleshoot wiring, sensors, and other electrical faults. We also diagnose DPF, DEF, and related emissions system warnings on equipped Peterbilt trucks. Suspension inspections and repairs help address handling and wear concerns on trucks working under heavy loads.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistWe work on Peterbilt trucks including the 389, 579, and 567. Each model can have different engine and drivetrain configurations, so we tailor the inspection to the vehicle and its symptoms. We also provide preventative maintenance to help fleets plan service before a problem takes a truck out of operation.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistCall Rapid Diesel Repair at (909) 701-8755 with your Peterbilt's year, model, engine, and repair concern to schedule service at our Ontario shop.
Our process
We use advanced diagnostic tools to read codes, live data and system tests.
We go beyond code definitions to identify the true root cause.
We walk you through the issue and repair options before any work begins.

What makes us different
Based in Ontario, CA, Rapid Diesel Repair is a full service diesel shop focused on accurate diagnostics and dependable repairs.
Hands on experience with diesel trucks and fleet vehicles.
We pinpoint problems accurately to minimize downtime.
Durable components for long lasting repairs.
We explain the repair and price before work begins.
FAQ
We work on Peterbilt trucks including the 389, 579, and 567. Each model can have different engine and drivetrain configurations, so we tailor the inspection to the vehicle and its symptoms.
Yes. We provide preventative maintenance to help fleets plan service before a problem takes a truck out of operation, along with repairs for urgent faults.
We diagnose the emissions system on equipped trucks to find the actual fault behind the warning, then explain the findings and repair options before any work begins.
We work on light, medium and heavy duty diesel trucks, fleet vehicles, trailers and RVs, including Freightliner, International, Peterbilt, Kenworth, Volvo, Mack, Hino, Isuzu, Ford Power Stroke, Ram Cummins and GM Duramax.
It depends on the truck, the parts and what we find. We diagnose first, then explain the repair options and the price before any work begins, so there are no surprises. Call, text or use the form to get started.
Calling ahead is best so we can plan bay time and parts. If your truck is down, call (909) 701-8755 and we will tell you the fastest way to get it in.

Ready to get answers?
Accurate diagnostics. Honest answers. Get back on the road faster.