I recently took my 03 chevy Duramax to Swartz for a check engine light. They diagnosed the problem quickly and were able to schedule the repair for the following day. I picked up the truck and was very surprised to find my bill was even less the expected. Don and his crew are absolute experts in repair. Thank you!!

- Tom

All I have to say is that Don Swartz is the most honest man and mechanic I have ever met. He has always done wonderful work for me and my family. He has never price gouged or done unnecessary work, he even took in one of my nephews and started him in a great successful career. 30 years and going strong in business and still holds an A+ rating. Anyone who does business with him is considered lucky and will be provided with excellent and honest services.

- Jordana A.

After meeting Don, I wouldn't trust anyone else with my diesel. A true professional who stands behind his work.

- Adam M. 

Swartz Diesel is a rarity in modern times. Don and Chris run a business the old-fashioned way, with honesty and first-class, highly technical knowledge about Diesel repair. They're very pleasant to work with and they provide excellent customer service. I felt like I was dealing with friends though we just met.

-Robert F.

Great service! Friendly people! Recommend them always!

- Travis M.

Very informative and takes care of his customers.

-Brian R.

Our go-to fuel service as the largest commercial Solar company in southern California!

-Ron W. 

Had a problem with my truck while visiting nearby in Nevada City. Don is an honest man and knows his stuff. He diagnosed it over the phone, and when I limped it into his shop, he was able to confirm it and fix it to get me back on the road. If you're looking for an honest businessman backed by a couple of decades of experience, take your rig here. I can't speak highly enough of Don. He epitomizes what we all want to see in any business we visit. - Mike S.

True experience and accurate trouble shooting. Saving customers money! - Bobby F.

I was having a problem with my diesel F-250 while camping. Called and Don spoke to me on his day off. Seemed extremely knowledgeable, nice, and professional. I am looking forward to getting the truck to him so he can diagnose the problem and fix it. - Mike S.

  • Jasper
  • 24-Hour Dropoff
  • Acdelco
  • ASE
  • Banks Power
  • Bosch Automotive
  • Cummins Diesel
  • Duramax Diesel
  • Fleet Services
  • Ford Power Stroke Diesel
  • Lucas Oil
  • Motorcraft Parts
  • NFIB
  • Onan Generators
  • Radiator
  • RV Repair
  • State Inspection
  • Towing

Swartz Diesel

13368 Grass Valley Ave
Grass Valley, CA 95945
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location small (530) 477-1437
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Weekdays:   8:00 AM - 6:00 PM
Weekends: CLOSED


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