Fleet & Diesel

Your Go-To Fleet & Diesel Services in Rancho Santa Margarita and Huntington Beach, CA

When downtime costs you money, you need a shop that works as hard as your vehicles do. At Bobby Grich Auto Repair, we specialize in dependable, fast-turnaround fleet maintenance and diesel repair for light and medium-duty vehicles. Whether you’re managing a fleet of service trucks or running a Powerstroke daily driver, we bring professional care, integrity, and a commitment to quality that keeps your operation rolling.

Just like Bobby’s approach on the field, focused, consistent, and built to perform, we deliver diesel and fleet services with the same drive and dedication.

Diesel Engines Need Diesel Experts

Diesel engines are built differently, and they need to be serviced differently too. With higher compression ratios, turbochargers, specialized fuel systems, and unique emissions controls, proper diesel repair calls for skill, experience, and the right diagnostic tools.

We handle maintenance and repairs for:

Powerstroke: From 6.0L to the latest models, we know the common failures and how to prevent them.

Cummins: Whether it’s a workhorse Ram or a medium-duty truck, we keep your Cummins reliable and road-ready.

Duramax: We service GM diesel engines with precision, addressing injection issues, DEF systems, and beyond.

Light & Medium Duty Diesels: Including Sprinter vans, Isuzu box trucks, Ford Super Duty, Chevy Express, and more.

Whether it’s oil cooler replacement, fuel system repair, or glow plug diagnostics, we handle diesel problems with no guesswork.

Fleet Maintenance That Limits Downtime

For fleet managers, every hour off the road is an hour of lost productivity. That’s why we prioritize fast, accurate fleet service with flexible scheduling and efficient communication. We service:

Local service vehicles
Delivery and logistics trucks
Commercial vans and pickups

Sprinter fleets
Trades and contractor vehicles

From preventative maintenance to emergency diagnostics, we keep your fleet running reliably, with DVI reports and clear service timelines that help you stay ahead of breakdowns.

Our Fleet & Diesel Services

We offer complete diesel and fleet repair services in Rancho Santa Margarita with transparent diagnostics and OEM-quality parts. Whether it’s scheduled maintenance or troubleshooting a warning light, our ASE-certified team is ready.

Diesel Repair & Maintenance

Our diesel repair services are designed to keep your vehicle running strong with expert care for critical components.

Engine Diagnostics & Performance Repairs: Identify and resolve power loss or drivability concerns.
Turbocharger Diagnostics & Repair: Fix boost issues, excessive smoke, or slow acceleration.
DPF & DEF Maintenance: Clean, service, and reset your emissions systems.
EGR Valve & Cooler Service: Address clogged EGRs that affect emissions and performance.
High-Pressure Fuel System Testing: Check injectors, pumps, and fuel rails for proper delivery.
Cooling System Service: Prevent overheating with radiator, thermostat, and water pump care.
Glow Plug & Injector Replacement: Ensure smooth starts and efficient combustion.

Fleet Services & Management

We help reduce downtime and streamline maintenance for multi-vehicle operations.

Synthetic Oil Changes: Long-lasting protection for hardworking engines.
Tire Rotations & Brake Inspections: Extend tire life and catch safety concerns early.
Transmission Services: Maintain performance and prevent wear.
Digital Vehicle Inspections (DVIs): Photos and notes sent straight to your inbox.
Maintenance Tracking: We monitor mileage, usage, and schedule service for you.
Fast Turnaround: Quick service to keep your vehicles on the job.

CARB-Compliant Repairs

California’s Air Resources Board (CARB) regulations are strict, and compliance is non-negotiable for your diesel fleet. We offer:

CARB-compliant emissions repairs
DPF cleaning and diagnostics
Smoke test support
Guidance for fleet compliance standards

Built to Last, Backed for Life

Not many shops back their work like we do. Our lifetime warranty on parts and labor sets us apart, giving you total confidence in every service. We also partner with extended warranty companies so you’re always covered.

Built to Last, Backed for Life

Why Local Businesses Choose Bobby Grich Auto Repair

We know you have choices, but here’s what makes our fleet and diesel services different:

Fleet-Focused, Customer-Driven: We get your business needs. That’s why we offer fast, reliable service with minimal downtime so your team can stay on the road.

Clean, Baseball-Themed Facility: We’re not your average shop. Our clean, organized facility and baseball-themed touches reflect our pride in every repair.

Certified Technicians, Trusted Work: Our ASE-certified team has the diesel training and experience to diagnose accurately and repair efficiently.

Flexible Financing Options: We offer Affirm, Klarna, and Sunbit to help you manage service costs. We also offer early bird drop-off and digital communication to make your day easier.

Lifetime Warranty on Parts & Labor: While many shops walk away after the repair, we stand behind our work for life. That’s how much your trust matters.

Early Bird Drop-Off

Online Payments

Financing options via

frequently asked questions

What are your business hours?

We are open Monday – Friday from 7:00 AM to 5:00 PM and Saturday 8:00 AM to 5:00 PM . Our flexible hours make it easy to get expert auto repairs at a time that works for you.

Where are you located?

You can find us at 28622 Oso Parkway, Suite A, Rancho Santa Margarita, CA 92688. Our shop is conveniently located for local drivers needing reliable auto care and a new shop opening in Huntington Beach.

What types of vehicles do you work on?

We service all makes and models, including domestic, European, Asian, and electric vehicles like Tesla. Our ASE-certified technicians have the expertise to handle everything from routine maintenance to complex repairs.

Can I book an appointment online?

Yes! Booking an appointment online is fast and easy, allowing you to schedule service at your convenience. However, we also welcome walk-ins and same-day service whenever possible.

Is this a cost-effective alternative to the dealership?

Absolutely! We offer dealership-quality repairs at fair, transparent prices, using high-quality parts backed by a lifetime warranty. Our expert service ensures the same level of care without the high costs.

Do you offer any discounts?

Yes, we offer military, first responder discount, AAA discount throughout the year. Please check our Coupons page for the latest promotions and savings on your next service.

Can I check on the status of my car at the shop?

Yes, you can contact us anytime for an update on your vehicle’s repair status. Our team ensures clear communication so you know exactly when your car will be ready.

Do you offer a warranty on repairs?

Yes! At Bobby Grich Auto Repair, we stand behind our work with a lifetime warranty on parts and labor, ensuring long-term reliability and peace of mind. Additionally, as a Technet-affiliated shop, our lifetime warranty is honored nationwide, so you’re covered wherever the road takes you

what our customers say about us

Schedule Fleet or Diesel Service in Rancho Santa Margarita, CA

Your fleet doesn’t take a day off, and neither do we when it comes to keeping it running strong. Whether you drive a single diesel workhorse or manage a lineup of vehicles, Bobby Grich Auto Repair is your go-to for dependable, efficient, and professional service.

We’re proud to serve Rancho Santa Margarita, Ladera Ranch, Rancho Mission Viejo, Coto de Caza, Wagon Wheel, and surrounding communities with honest repairs and long-term support.

Call or text us at (949) 709-8007, book online, or stop by our shop at 28622 Oso Pkwy Suite A, Rancho Santa Margarita, CA 92688. Because when it comes to your business, every mile matters, and every repair counts. Legends on the field, experts in the shop.