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Twin Peaks Diesel

Twin Peaks Diesel

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4.9 Google Review
3771 Monarch St #Unit A, Frederick, Colorado, 80516, United States
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Refresh Reviews 4.9


Dec 30, 2017
I broke down on the interstate passing through and had my pickup towed to this shop. The guys were extremely knowledgeable and did everything they could do to help me. I would recommend this shop to anyone. This is by far the best repair shop I've ever been too.

Jun 8, 2017
Had taken my truck here due to some strange behavior including what appeared to be Turbo Bark and a popping noise in the exhaust. I brought it in expecting the worst with a blown head gasket. Casey and the crew at Twin Peaks ran test after test and came back to me with their results and walked me through everything. Long story short there was no issue with the truck (and its been running top notch ever since). The guys at Twin Peaks earned a customer for life due to their honesty and how straight forward they were during this time. The price for the diagnostic work was really too fair, they could have charged me a lot more and most places would have. Some other places might have charged me for an unneeded head gasket too. If you want a mechanic you can trust and who makes sure you know what needs to be done I would recommend going here to Twin Peaks.

Jan 5, 2018
Just plain awesome service! Could not be happier.

May 11, 2017
The team at Twin Peaks Diesel is the best. I've brought my 2005 Dodge Ram diesel here for years and they always provide quick and honest service. My truck still runs like it's brand new thanks to the team at Twin Peaks. I highly recommend them and wouldn't take my truck anywhere else for service.

Jul 3, 2017
Twin Peaks Diesel did an injector swap on my 2003 Duramax that I've owned since new. They recommended Dynomite 50hp injectors and a Cat filter swap. Pricing was fair and I was impressed with their knowledge of the truck (it's a ZF6 manual and fairly rare) and didn't push anything, just their personal experience, knowledge, and facts. After extensive research I agreed to the injector upgrade and filter kit (which he installed at no extra charge since he already had it apart) and COULD NOT be happier. He said it would run better than new but honestly it's way smoother than new. The extra 50hp is absolutely noticeable, especially in the 2k-2800 rpm range. Can't verify mileage yet as this truck tows 90% of the time and I havn't towed but maybe a few short trips. I appreciate no BS shops that are fair on pricing, and so far cannot recommend these guys enough.

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Opening Hours

Mon:7 am - 5 pm
Tue:7 am - 5 pm
Wed:7 am - 5 pm
Thu:7 am - 5 pm
Fri:7 am - 5 pm Today