United Diesel Service Inc 1903 Penn Mar Avenue, South El Monte, CA 91733

"I've been driving and owned pick ups for a very long time. But this is the first diesel I've ever owned. I found UDS by chance on the internet, and had a gut feeling about them. I was right!! Mario has been great. Easy to talk to, and explains everything very clearly. And appreciate it when only do what's needed. Unlike a lot of other shops that will tell a story. I mostly appreciate the communication and updates. Very rare today. And Mario is very good at that. I've been 100% satisfied with their work and service. Did I mention that don't live very close to them. But I am willing to travel the distance. You will not regret using them. And everyone I've met there are so friendly."

"Great service and quality work. Sal quickly resolved issues with my 2019 Mercedes Sprinter van, was knowledgeable about everything and a complete professional. Will be using the service of United Diesel Service again and highly recommend this place for quick, affordable, quality work."

"Outstanding, Truck fully serviced, had a few wrinkles pop up and they ironed them out immediately for me and got me back on the road before my deadline. Cannot recommend them enough, fantastic service, from people who actually care and treat you like an actual human being instead of just another faceless invoice. Love these guys so much, ill be sending a Christmas Card!"

"I have a 1992 Toyota Townace Japanese camper van that is diesel and 4x4. I've had to get help with a fuel pump repair and now an exhaust replacement part. These folks at United Diesel really know their stuff and are pros with all diesel engines. Frankie has been super helpful, quick, and communicative with me and has been great to work with!"

"Tommy took on my very unorthodox diesel project with no fear. Delivered as promised. I have my truck towed from another shop where they were said they would fix it and then changed their minds after a month of staring at it. The entire United shop was excited to see my 1952 Chevy with a diesel conversion, they appreciated my truck as much as I do."