Walnut Creek, CA Diesel Truck Repair & Diesel Truck Services

“Have a 2016 3500 Ram, the bulletproof engine service was done , installed FASS fuel system , repaired items which needed attention as well after their inspection. Mark ,Jason , Kim and Team members all Professional. A Pleasure to find a shop who does what they say at the price they give. I highly recommend to any Diesel owner who wants integrity , solid workmanship and professional service.”

“Excellent customer service and repair service.”

“These guys are awesome and did me a great job. I couldn’t begin to tell you how much work they did on my old 1997 and it was all done at a fair price and everything was done when they said it would be done. Thanks guys you rock”

“Sounds like you guys will build a great engine for the working man. Hope your biz is the best”

“Jason and his team at Devil Mountain Diesel have done extensive work to fix up our 14-year old Sportsmobile 'Classic' 4x4 2006 Ford E350 Van. This included: replacing front wheel disk pads, rotors, steering gear, ball joints, shocks, and brake pads. But their biggest job was to 'bullet proof' the engine to take care of potential cooling problems that might crop in the future, and to fix or replace any items that they found where needed. Finally, they also adjusted the transfer case so that the 4x4 high manual stick shift worked properly. We have now taken out the Van on a few trips into 'The Wild' and are very happy with the excellent work they have done. It gives us confidence that we are not going to get stuck in some remote place because of preventable mechanical problems. Thx much to Devil Mountain Diesel!!!”

“We had both our trucks die on us. One needed a new turbo and the other is getting the full 6.0 bullet proof treatment. Very impressed with the communication, organization, and expertise of everyone at Devil Mountain Diesel. Pricing is very fair for the experience and expertise of the mechanics. Officially swapped shops and will be coming here all the time.”

“My first experience at Devil Mountain Diesel was a positive experience. Kim in the front office was very helpful. She was knowledgeable and was able to answer my questions. She was able to reschedule my appointment due to my work schedule. Mark is one of the owners and he was glad to answer my concerns regarding my 2017 Ram 6.7L Cummins Diesel truck. They changed all the fluids, all filters and replaced the OEM transmission pan, front & rear differential cover with aftermarket ones. I'm having DMD do all the future maintenance and upgrades and not the dealership. I highly recommend DMD for all your Diesel truck repairs.”

“Some people hold a higher bar for quality than others. These are those people.”

“I own a 1986 F250 entrusted to me after Papa passed away. Some compared its steering to riding a cow, and I poured money into fixing it but could never get it right. Recently, I overworked the truck, and wrecked the steering gear and pump. Devil Mountain Diesel replaced the pump, gear, and front bushings transforming the truck into what feels brand new. I would never be able to express the extent of my gratitude for the amazing job they did. While expecting to pay more than what they originally quoted, given that I requested more expensive parts, the final bill was slightly lower than. When picking it up tonight, I found it cleaned from top to bottom and the ride home was crisp and amazing. While other shops decline to work on this model year, Devil Mountain has given it new life. The truck means a lot to our family because it's not only very useful but it reminds us of a great man that we all miss dearly.

This was the second time they worked on it, and I could not be happier with the quality of the workmanship and exceptional service.”

“A very proud customer to have done business with you all. The confidence to fire up after being stranded with my trailer on my birthday is like no other. Now they did have to calm my nerves a couple of times but it was all because of some unforeseen issues and an oil pump that did not want to cooperate. After a full on heavy duty bullletproofing and some cooling solutions no one else will touch that truck unless I'm washing it. Just trust the process and wait for Kim to call. Excellent workmanship with a stock appearance. Highly recommend DMD. Thanks again fellas!!”