Fast & Great service would recomend to everyone that need services on the truck. Even does annuel…read moreinspections.

I took my Cummins Diesel Motorhome to a high end truck shop, they spent the whole day with it and…read morecouldn't figure out the issue, I called Juan and he came to my house, diagnosed and fixed my motorhome, he changed the lift pump and fuel filter and had me back on the road! Juan, Andres and Jerry are good hardworking men, I will definitely call them back if I need help in the future.

owner is a complete scam, shop did the overhaul on my truck, promised me 2 weeks turned into 2…read moremonths followed by lies and lies from the owner even after catching him in lies. gave me a price from the begining and somehow ended up with thousands more on the bill.

Martin and his crew did a great job! We emailed late when we found a leaking axle seal......They…read moreresponded immediately and had it fixed the very next day for a fair price. VERY happy. Would definitely recommend and will use them again!

Shop Suks , guys have no experience. Trenton worked on my truck 3 times and now won't answer or…read morecall me back due to major issues they caused when it broke down the following day . Typical crappy bad customer service mechanic . They pick and choose there repairs and then when they can't fix it there a ghost . Would not recommend this mechanic at all . Always just say no if you can't handle the repair or are just extremely inexperienced, it saves a lot of time . Reporting to the BBB.

If you own a diesel truck Mad Tech is the only place you should take your truck thank you for…read moregetting me back on the road safely .

As a business owner trying to find a central location to have my loaded trailers stored safetly is…read morediffcult to find. Luckily Rafael Was able to answer any doubts and questions i had. Great Pricing I will be working with R&R fleet moving foward! Thank You R&R

From the owner: Located in the center of Fontana. We provide Secure Truck & Trailer Parking - We offer Truck,…read moreTrailer & Tire Repair

Juan nick and Kelcey are the best diesel technicians around if u wanna get your truck fixed the…read moreright way I recommend going to mega five star review

I didn't even want to do one star. This guy is a con. I…read morewill not recommend nor have any of our trucks or trailers ever get serviced by this company again! I will let all my USA affiliates know about the way they operate and treat you like a criminal. Never in all my years have I dealt with this. I said right from the start, the starter wire (common on Volvo trucks) or battery cables loose. I told him I will put him on our perferred list, if he was fair, but obviously he didn't care. I asked several times for the part number and he played stupid. I had both the Delco Remy and OEM numbers to confirm what he was attempting to put on and we ended up putting the old one on again and it was the starter wire like I said. This guy turned and said $850. And I said no! We fought and he put it down to $650. but we should not have paid more than the agreed service call of $350. as he was just trying to pull a fast one. We had an important load to deliver and he screwed us up on that too. I would check his credentials as a mechanic, because they shouldn't be crooked. I have been in the trucking business for decades, have come across shady characters before but this guy tops all, my driver even said that he was just screwing us and wasting our time. Starter wire...6 hours????? This place is a joke!

Great service. Freddy is very knowledgeable. I take all my trucks here when im in CA. Hes a diesel…read moretechnician and hes the one working on your equipment. I've never had to come back twice for same issue.

Superb service and support! FTR really got me out of a difficult situation with my vehicle which…read moreneeded a full engine replacement! The team went the extra mile to help me get it to the shop. They were helpfully informative with their diagnosis and repair plan. They took care of finding good quality parts while ensuring that the job was completed in a timely manner. I was back on the road before I knew it! For context, I went with this after receiving a ridiculously high quote from a different shop. This place offered me a reasonable price while giving me a piece of mind.

I own an off-road tour company that does tours with a diesel truck called TourZilla. When we have a…read moremechanical problem, it can be a major issue and it's extremely important that we get the repairs done right and on time. The team at Rapid Diesel Repair has gone above and beyond multiple times to keep TourZilla on the road and keep our guest happy. As a business owner, I cannot think Robert and the entire crew at Rapid Diesel Repair enough for the hard work they've put in to keepTourZilla on the trail, which keeps our guest happy, our employees working, and helps keep our local economy, moving. Thank you, Rapid Diesel Repair you guys are freaking awesome.!

More than just a repair shop, they showed me thier shop which was clean and ready for business. Up…read morefront and updating me on where they were at with my rig. Well priced, and on point with not only the work they were doing, but a full inspection on everything to make sure you're on you way.

These guys are a bunch of haks with absolutely zero mechanical integrity or accountability for…read moreservices not rendered properly. I experienced what I assumed was transmission problems while driving through Fontana, CA. in Nov 2025. I was driving a 1999 Fleetwood Pace Arrow with the Ford V10 F-53 chasis. Good Sam towed me to J&L where it was discovered that my flywheel had broken. They jacked up the front end & backed the transmission off so they could get to the flywheel. in doing so they broke a cooling line and spliced it instead of replacing it. They installed the wrong flywheel then left a main transmission wiring harness unsecured which allowed it to fall onto my header and short out three solenoids in my transmission causing catastrophic failure. Additionally, the compression fitting that was used to splice the cooling line leaked so they shoved an O ring in it which eventually clogged the line causing further damage

From the owner: J & L Truck Repair LLC has proudly served Fontana and the Inland Empire since 2015, specializing in…read moreprofessional diesel semi-truck repair and maintenance. We know how important it is to keep your trucks on the road, so our team provides fast, reliable, and affordable service for both independent drivers and fleet operators. Our services include complete diagnostics, engine repair, brakes, transmissions, suspension, preventative maintenance, and more. Whether it’s a minor fix or a major repair, we get the job done right the first time. We take pride in honest service, competitive pricing, and quality workmanship that truck drivers can count on. Walk-ins are welcome, and we work hard to minimize downtime so you can get back on the road quickly. At J & L Truck Repair LLC, your rig is in good hands.