Everyone is super friendly. They were able to get my bus in a week earlier than was expected and answered all my questions and concerns. Im so grateful for the information they were able to provide. I will definitely be utilizing their services in the future!

Awesome customer service! Needed a brake flush on my 40’ RV ... called a few places and they all referred me to Apex! They were able to get me in that day which was awesome as I was traveling through the area. Alex, my tech, was awesome! He got us in and out quickly and was able to patch a weld on my stairs that made them useable again. I wish they were in my home town for other needs I have! They are definitely one I’ll remember as I will likely be in the area next summer. Thank You Alex and the team!

Cannot say enough about Apex diesel. We are doing a cross country road trip in a 98 bus and it broke down in Big Sky. We were looking at a $800 dollar tow or a high hourly and mileage rate from similar diesel repair places. Seth from Apex was much less expensive and much more helpful than everywhere else, coming out to us very quickly. He diagnosed the problem quickly and fixed it, teaching us a lot about our bus and explaining how to prevent it in the future in the process. They saved us a ton of money and time, we are extremely grateful for Seth and the people at Apex.

Apex was Amazing to deal with. They got my truck in and fixed quickly after having it at another shop for months with nothing getting done.They were very kind and made sure to keep in communication with me about what was needing done.They are very reasonable in there rates also.I will be going only to them from now on!

If you are ever in need of a diesel engine repair in Bozeman on short notice, I highly recommend Apex Diesel. Seth, the mechanic, was absolutely superb in the response time as I need to get back on the road back home. His diagnosis and overall knowledge of a 6.0 in a 2005 F350 was the best. I brought it to him in the afternoon and he had it repaired the end of the next day. This was despite all the previously scheduled work in the shop. All the staff was extremely helpful in every way.

Apex and Seth got our plow truck back up and running in time for an upcoming snow storm on very short notice! We will be using Apex in the future for our heavy diesel needs

Great service and staff