Phenomenal service!! Sadly the 2 times I have needed to call were first thing in the morning and at almost 9pm. Steve was so quick to come to the rescue! If youve got a diesel, this is your place

Fantastic service, Ill be back. I had called several shops looking for some guidance and advice on what mods I should pursue for heavy duty towing and also was having some overheating issues. Afyer calling several other shops who just wanted to know what I wanted done, Eric spent about 1/2 an hour on the phone with me on my first call asking questions and giving me advice. No up-selling things I dont need, even talked me out of some things I was mulling spending $ on. While it was there Kristi in the front office kept me up to date and answered all my questions. Got the truck back today, and couldnt be happier. Went here on a personal recommendation, and Ill second that for sure. Thank you to the whole crew at Big Thompson

Experienced and honest ! Kristi & Erik are so honorable. I totally trust them with my 06 Trail Blazer SS.

They re did my transmission. Took him 3 × 2 do it right. Cost me 4 days in work. I got last then 5000 miles out of my transfer case before it completely ripped the bolt off. If I was you I wouldnt bring anything to these people

Excellent service. Honest and trustworthy repairs.

I wanted to give a big shout out to Big Thompson Diesel and Automotive! 😃. THANK YOU for fixing my car!!You guys saved me over $1500! The car shop hat I took to before had had it for five days, were charging me $2000 and were just taking a guess at what was wrong with my car! They didn’t even bother to explain anything to me!From the time that I walked into the door Kristi was very nice and very informative. I started to tell her about the noise that my car was making and she was informing me of what it could be and was looking up parts and prices. As Kristi was lletting me know, Erik walked in and Kristi then was explaining to him what was going on with my car. Erik and Kristi walked outside and we’re checking my car out right then and there!Erik and Kristi know exactly what they are talking about when it comes to diagnosing cars! I left my car on Tuesday afternoon when I left town, received a call in Sunday letting me know that my car was ready and i picked it up Monday morning when I got back into town. Thank you Erik and Kristi for explaining everything and making me laugh 😂 while I was stressing my car🚙!Thanks 😊

Probably one of the best shops Ive been to! Eric is really knowledgeable and knows his stuff. Great customer service and do a great job taking care of your vehicle and explaining to you everything it needs.

If you are looking for a Diesel repair shop to repair or maintain your truck, THIS is the place you need to come to. Their customer service is the best in the industry and the owner is extremely knowledgeable. We have taken several of our trucks here and will continue to come back. We recommend this shop to anyone that is looking for an honest, quality repair by knowledgeable mechanics. Cheap is seldom good, and good is seldom cheap. There is a difference.

One of the best shops ive been to sent my truck to them they were very honest amd affordable and very quick with repairs i highly recommend this shop and will be back thank you btdaa

We have used Big Thompson Diesel and Automotive for all long as I can remember. They work on our personal cars and our fleet of diesel work trucks. Best shop in Northern Colorado!

Did a great job on the F350 new head gaskets NEW ECU set up all sensors replaced turbo and moreOne year later no leaks and running strongI recommend you stop in tell them whats wrong with your diesel

We have had two trucks (GMC and Ford) for full services and a couple of tough diagnostics. Their prices were fair and they provided great work. Very happy with Big Thompson and we will be back.

Excellent experience. I trust them100%. Highly recommend and will be referring others!

Loved the service and the way they kept us in the loop every step of 5he way..only thing I would suggest is if u drop $7000.00 with u it would be nice if you threw in a car wash

This is the only place I take my 03 Ford F350 Super Duty diesel. Erik, the owner is very knowledgeable, fair and stands behind his work 100%. I would recommend Big Thompson Diesel and Automotive to any and every body looking for a top notch repair shop.

Best mechanics. Best service. Trustable organization.

This is the best & only shop I will bring my truck to.

Had all the right parts that I needed

Awesome place take all of our vehicles here.

Took our truck to this shop, because of a wiring issue . They didn’t even want to drive it because “the turbo was bad” and there was “so much” wrong with the truck, keep in mind it has a brand new motor, new cp3 new injectors, new EVERYTHING . It was simply a wiring issue that I couldn’t find . After I picked the truck up from the doing absolutely nothing to help me or fix the truck, I actually played with a couple of wires and replaced a alternator wire, and it started to run . Now it’s running strong, turbo is good, and I drive it everyday . Thanks for being “scared” to drive it and see what the problem was . I wasted my money and if I could give zero stars I would .

They are professionals, honest and have a great service

Great people great prices

Great people and honest

Friendly, knowledgeable and prompt