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November 2023 by Savannah Jaska
Such amazing service! They are certainly busy but you can see why! Got me in day of and despite being busy, I was in and out quickly for an emissions test. Really good people who know their stuff. I’ll definitely be back if I have any trouble with my truck.
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October 2023 by Chris Shovein
Shawn is a diesel head if I ever knew one. Guy knows them in and out, hasn't been an issue he won't take on. Amanda runs a right ship in the office and is always friendly when we callHasn't been an issue with my LB7 that he couldn't diagnose and fix for a very fair price. He is honest about the state of your vehicle and about what it needs. Even was open to honest recommendations to quality shops in the area when he was booked up weeks out.Won't be going anywhere else to service my truck and get emissions done. Thanks for the great work y'all.
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October 2023 by Gordon Patrick
Shawn really knows his stuff about diesel engines and all around vehicle maintenance, he's honest and was spot on knowing the what the issue was with a developing defect with a new radiator he installed. Hassle free warranty and quick turn around replacement. I recommend Proformance for any diesel and truck service.
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October 2023 by Craig Jones
These guys are amazing. Took great care of me and my Motor home. Will definitely use again.
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August 2023 by Gino Carlucci
Brought my Truck in for an emissions test. Was running fine. Would not start after he got done. He took off the exhaust pipes and was under the hood, which they are not allowed to do. They are allowed to do a visual that's it. Were filing a suit as it cost $$ to get the truck repaired after they touched it.
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August 2023 by Clint Nickerson
Shawn put my 2002 Duramax on the Dyno for emissions testing. My wife and I were sitting near the entrance of the shop over 100ft from the dyno. We were talking and all of a sudden heard my truck being absolutely red-lined, floored, completely maxed out rpms. I jumped out of her car and ran over toward the bay and all I could smell was burnt clutch. Shawn then brought my truck around and turned it off not giving it a chance to cool down. He informed me the truck failed emissions testing and didn't mention my clutch until I asked him and he said"oh it started to slip so I shut it down immediately " which was a bold faced lie because as I said I heard it pinned to the floor for almost a minute. I took my truck home and could barely get it to shift. I went back with my car because my truck is now undrivableand he didn't offer any apology or solution other than that's how he's supposed to test it. I called my mechanic friend to tell him what happened and to set up a time for a new clutch, transmission and compression test on my engine since Shawn personally destroyed all these things and my friend told me how this man has burned out 2 clutches on other people's trucks. Left one truck in a state that it would bot even start after testing and a mechanic had to come fix it at Shawn's parking lot. Wrote "failed test" on the back of another man's truck on his tailgate in the dirt on the paint. Disassembled another man's exhaust and left it half asked back together to prove he was lying about a catalytic converter. I will be getting all these people together to file a legal complaint with the state and put Shawn OUT OF BUSINESS. DO NOT I REPEAT, DO NOT!!!! BRING YOUR VEHICLE TO THIS MAN'S SHOP HE WILL ABSOLUTELY 100% DESTROY IT. I am more than willing to talk to anybody about this experience personally this guy will wreck your vehicle.!!!!!!!
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June 2023 by Marshall Massaro
Proformance is truly the best mechanic shop that I have experienced in the 30+ years I have been driving! I have been using Proformance since I moved to Berthoud in 2014 for repairs on my diesel and unleaded vehicles. Shawn, Jesse, and Amanda always provide a good explanation as to what needs repair and only repair what is necessary to fix the problem. Other shops I have experienced in the past try to repair everything rather than find the root of the problem…this is not the case with Proformance. If you’re looking for a trustworthy and competitively priced mechanic who stands behind their work, I highly recommend the Proformance team!
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June 2023 by Sean Anderson
Shawn, the owner, gave me an excellent recommendation that saved me alot of money. He was very knowledgeable and it was much appreciated. His technicians and Amanda helped alot as well and I would definitely return.
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May 2023 by M VOX
Just had Shawn do my emissions on my F250. Very professional, polite and fast. Will start going there for service.-Loren
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January 2023 by Ben Dennis
These guys are awesome to deal with and end up doing needed service on my truck everytime I have to do emissions testing. 270,000 miles and no issues and no check engine lights.
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December 2022 by Skyler D.
Amanda's, insolent tone... Would drive anyones Business to the Ground. what a shame to speak to anyone like that.
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December 2022 by Stephanie
Highly recommend! We found Proformance when we needed work done on our diesel truck over 10 years ago, and we wouldn’t go anywhere else. We take our cars here, too - I just picked up my Jeep from a 100,000 mile service and it’s good as new. Shawn and his team are great at communicating what’s necessary and what can wait for later. I’m leaving feedback because I think everyone needs a mechanic that they can trust.
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October 2022 by Lexi Burgio
Hubby and I own a car lot in Longmont and we take all of our diesels here for emissions testing. They make it fast, easy and efficient. Always have quick availability too
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August 2022 by Tom Whiteaker
Excellent service and very informative for Diesel emissions. No nonsense and trustworthy. Far superior to other options in the area.
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July 2022 by Trevor Benson
I found myself 700 miles from home with truck problems that had to be resolved before I could drive home. After getting the run around at another shop and spending almost 500 dollars to still have the same issue, Performance Auto Repair-Diesel diagnosed and fixed my truck the same day. They were very busy but could see I was really in a bind. I would highly recommend them if you are looking for an honest and professional experience.Thanks again!
