I had an issue with my fuel being contaminated. I was nervous about bringing it into a dealership and being overcharged. Steve, the owner of diesel doctors, Came out within two hours. He gave me a set price at the beginning and proceeded to spend seven hours working on my truck. It has been working great ever since and I couldn’t be happier with the service and expertise that was provided. Five stars is not enough for this company, I would recommend to everyone who owns a diesel truck and is in a Predicament.