DNA Diesel LLC in
Cedar Falls (IA)

Honest and transparent. Highly recommend. If we are in the area again, we will certainly use this company. OTR issues-- you find and see many bad apples in the mechanic world. It was very refreshing talking to and working with this group on our Freightliner repair today. Thank you!

Awesome place. They got me right in for a brake chamber job and didn’t hesitate to work on it outside in the cold to get me back going again.

Great service, friendly staff, and excellent work. Highly recommended

I wish I could give more than 5 stars. Called DNA Diesel, even though it wasn’t a diesel. One of my guys van was down. Sean told me he had a tech finish up a call and could be there in 45, having electrical issues, Sean had the tech grab a battery just in case and to save time had after an hour after that a new battery- system check and bam. My guys van was back up and going Having auto issues hours away, brought a lot of potential expenses, having to tow it back to Des Moines. Which would have been a grip. I can’t say thank you enough to Sean and his Tech. Call DNA Diesel for all your problems.

This is the best place diesel repair I ever seen Good guy shop owner john . very professional Zero advantage , very honest people in here Thank you guys to help me back to road

I like the service super friendly that we were working in this company. I recommend everyone needs love use this company.

Had a air breather issue on my Pete 379 while hauling oversized loads , I called these guys they showed up super quick and had me back on the road in about 25 to 30 mins super down to earth, I have major respect for these folks! You will NOT be disappointed in the work! Give them a call for sure! I PROMISE YOU, you will not find another company who cares about random people like these guys do!

I contacted them a couple of months ago and forgot to leave a review. I was buying a truck and decided to have them do a pre-purchase inspection. Even though it was a Saturday, the shop owner himself agreed to do it, and he did a great job. We met at the appointed time, and he inspected it and told me what issues needed to be addressed. He did, after all. I've been driving my truck for two months now, and everything is great. Thank you very much, Sean?.

Anti freeze leak Shawn found it bottom tank radiator was Saturday late afternoon. Have to say the most friendly and professional ive seen in years in a shop. Treat you outstanding. Shop that reminds you of the professionalism we had back in 70's and 80's. My load going into Chicago. Im going to get empty and head back to Shawn at DNA to get a new radiator.

Saved our asses! We were on our way home from working a wedding with our beverage burros, The Dinky Drinky Donkeys, Dolly and Waylon. Stopped for fuel and discovered a flat trailer tire and of course it was after everything had closed on a Saturday night. Called DNA Diesel and Sean answered the phone. Told us to head on over and he swapped our tire out for us in no time. Can’t thank him enough! He was so kind and helpful so we could get our asses home safely.

Good mechanic I will in with my gasket leaking on my motor, and they fixed the issue quick, highly recommended them and good price.

My truck broke down and I had it towed to DNA Diesel around 1:30 PM. By 2 PM, they had diagnosed the issue and sent me an estimate for a DEF pump replacement. The repair was completed by 5 PM—super quick turnaround! Excellent service, very professional, and a great overall experience. I highly recommend DNA Diesel to anyone needing diesel repair.

I was in a bind stuck in Waterloo with 4 broken wheel studs. DNA was able to get me back on the road within a couple of hours. Super knowledgeable and friendly people!

STAY AWAY!!!!.. I broke down and managed to get to their shop, where they temporarily fixed a coolant leak. $1550 Later, I broke down again with the same issue in Chicago. When I asked for a refund, they refused. Even when I tried to be reasonable and requested at least half back. So to my fellow drivers, be cautious with this company. Overpriced scammers!

These guys were absolutely phenomenal. Great pricing, very honest and thorough and helped me get all the information I needed on a truck I was trying to buy. I highly recommend!

Truckers, this is the right place to come, this is an excellent shop. This guys here are amazing and they take pride in their work. Is in their DNA. Electrical problems??? Mechanical problems??? Don’t WORRY!!! They’ll fixed. Sean, the owner is an amazing person, vey knowledgeable guy. Very professional mechanics and they’ll do everything to help you and have your truck ready to go. I’ll be back if a face any problem in this area, that’s for sure. I strongly recommend this shop, don’t go around looking for another shop, this is the right place to come if you love your truck.

This guys are the best , they experienced, friendly and on time..I had issues with the transmission and within 2 days was back on the road. Thanks for good work.

I drove here because I had a coolant leak,, Shawn and his mackanic took me right in,. After hours at that. Some of the coolest people I've ever met. We will bring our trucks here for sure. Thank you guys,, you rock !!!

Hey, give these guys a chance... John is very concerned, helpful and passionate. When the temperature dropped below -8F° my truck couldn't start. I called him, he brought a generator to heat the truck and jumpstarts to boost the batteries. They are dedicated!!!

I was so distraught about my radiator and from the phone call to inquire about the svc needed til the last moment I was there, these gentleman were professional and treated me with genuine care. I was even gifted a Christmas present ( coolant) they saw my need??? I would certainly recommend DNA Diesel for your semi needs. Thanks for bringing a smile to my face after the day I've had! I truly thank the guys!!! They ROCK!!!!v

We got stuck on the side of the highway and they not only got us in the same day but fixed the issue and gave us a great deal! They were beyond helpful and kind and I cannot recommend them enough. (We are from Indiana so this said a lot to us)

Our truck need service on Friday evening 25 minutes from Cedar Falls. They arrived right on schedule. Went right to work. When the truck shut down due to lack of coolant, made a run back to their shop to obtain coolant and complete the repair. Friendly, responsive, and competent. Highly Recommend.

I had a anti freeze line go on my truck . I looked up a Google search and they were the first call ! They did a great job for me! Good guys to have work on my truck fast with very little down time. Far price even though I'm from out of town. We all know what it's like to be at the mercy of a place when you aren't there regular customer. This place is from my experience a TRUSTWORTHY Business ! BIG THANK YOU !! :-)

I live 100 Mike's from their shop, UT have decided I will only use DNA Diesel! They treat you very fair! Extremely knowledgeable on every issue I've had, a division they go to great lengths to get you fixed quickly.

These men were the epitome of kindness and professionalism! We were traveling from Illinois to South Dakota when we had an issue. They helped us immediately without hesitation, stopped what they doing to save our trip! I would highly recommend them to anyone wanting the best repair experience of thier lives!

Such a great team. They've got great techs, friendly office people, and everyone knows what they're talking about. They even offered custom made in house hydraulic hoses if I needed it. Like the friendliness and price of a mom & pop with the tech and expertise of a dealer. They have no rivals!

Shawn had one of his mechanics check out a truck I was looking to buy. They did a thorough job for a great price and the staff treated us like royalty while we were there, giving me pointers for the future. Highly recommended!