Cummins-powered trucks are known for reliability, pulling power and long-term performance. But even the best diesel engines need experienced hands for maintenance and repair. At RG Brakes & Alignment, we provide professional Cummins repair in Valencia CA backed by 35+ years of diesel expertise.
If you drive a Ram 2500, 3500 or manage a light-duty commercial vehicle equipped with a Cummins engine, our shop is ready with the tools and experience to keep your vehicle running strong. We handle everything from routine maintenance to complex diagnostics. Our team also specializes in diesel repair in Valencia CA, including Power Stroke and Duramax systems, but we’ve built a loyal base of Cummins owners who count on us for honest, efficient service.
To schedule Cummins engine service, call us at (661) 259-7098 or visit shop at 24309 Creekside Rd #110, Valencia, CA 91355.
Need fast service for your American car or truck? Call us today at (661) 259-7098 or book an appointment here.
We repair and maintain all Dodge and Ram trucks equipped with Cummins engines, including both legacy and modern models:
No matter if your truck is used for towing, hauling, daily driving or commercial work, we provide reliable service that helps extend engine life and improve performance.
I was a walk-in customer, but the people at RG made my job a priority on a Saturday morning, made sure the parts needed to be replaced were available, and finished the work in just a couple hours. I even had time to get some lunch while they did all the work! Other place like the dealer would just tell me to come back on Monday. Great customer service at RG! – Allen Kelly
We’re not a chain or a volume shop. We’re a family-owned diesel repair facility serving Santa Clarita Valley since 1987.
If you rely on your Cummins engine for work, towing or daily use, don’t leave repairs to chance. Our technicians understand the unique demands of diesel engines and offer solutions that last. From performance issues and emissions warnings to scheduled maintenance, we’ll diagnose the problem and fix it correctly.
Call us now to schedule a service or bring your truck in and let us take a look. From the latest Ram 3500s to reliable workhorses with 250,000+ miles, we’ll keep your Cummins running like it should.
Call (661) 259-7098 to schedule engine repair or diagnostics
Visit RG Brakes & Alignment at 24309 Creekside Rd #110, Valencia, CA 91355
Mon–Fri: 7:30am–5:00pm, Sat: 8:00am–3:00pm
Online booking available — submit appointment requests at least 24 hours in advance
Note: Appointments at 8:00 AM on Mondays are not available. Saturday appointments are walk-in only and handled on a first-come, first-served basis.
Cummins owners may experience EGR valve failure, clogged DPF filters, turbocharger wear, injector issues and crankcase pressure problems over time. Regular maintenance and proper diagnostics can catch these problems early and prevent major repairs.
Most 6.7L Cummins engines should have oil changes every 6,000–10,000 miles, depending on use. Short trips, heavy towing or idle time can shorten intervals. We always inspect oil quality and recommend changes based on actual condition, not just mileage.
Black smoke often indicates incomplete combustion, which could be caused by dirty injectors, a faulty EGR valve, excessive fueling or a failing turbocharger. We diagnose the cause and fix it to restore fuel economy and clean operation.
Yes, but it’s important to know why the DPF system failed in the first place. We can initiate a forced regen if needed, but we also test sensors and airflow to find the root cause so you’re not repeating the issue weeks later.
Hard starting in cold weather or rough idle at startup can point to weak or failed glow plugs. We’ll test the system and replace plugs or heater grids as needed.
Yes. We use OEM or OEM-equivalent parts designed to meet Cummins engine requirements, including filters, gaskets, sensors and fluids.
