Six2Six Garage — Trusted Diesel & Automotive Service in Fort Collins & Northern Colorado

Honest diagnostics, quality repairs, and a team that treats your vehicle like it's our own.

Popular Auto Services

Get the professional care your vehicle deserves in Fort Collins, CO

 Diesel Engine Repair & Maintenance - Fuel and oil filter service, DPF/EGR service, head gaskets, turbochargers, and fuel injectors — full diesel diagnostics and repair.

 Drivetrain & Suspension - Lift kits, leveling kits, and towing-ready upgrades built for how you actually use your truck.

 General Automotive Repair - Brakes, check-engine diagnostics, and repairs for gas vehicles of all makes.

 Oil Changes & Routine Maintenance - Fast, reliable service for diesel and gas vehicles to keep you on schedule.

 Fleet & Commercial Vehicle Service - Dependable maintenance and repair for local business and contractor fleets you can count on.

 Pre-Purchase & Diagnostic Inspections - Buying a used vehicle? Get a thorough inspection before you commit, so you know exactly what you're getting.

Choose Us For Auto Repair

We believe in doing the job right — no shortcuts, no surprises, just reliable repairs

2-Year / 24,000-Mile Workmanship Warranty Icon | Six2Six Garage

2-Year / 24,000-Mile Workmanship Warranty

We back our work — and we honor all manufacturer warranties too.

Free Estimates Icon | Six2Six Garage

Free Estimates

No cost, no pressure, on common repairs that don't require diagnostics.

24-Hour Key Drop Icon | Six2Six Garage

24-Hour Key Drop

Drop off anytime, day or night. We'll take it from there.

Same-Day Service Available Icon | Six2Six Garage

Same-Day Service Available

We'll do our best to get you in and out the same day on common repairs, based on availability.

What Our Customers Say

Reviews Icon | Six2Six Garage

5-star review by Jayden Leija

Great Cummins mechanic especially with motors with after market work done. I was out of town and had an old problem resurface and they knew the solution. I've had multiple people check it out and there the first person to ever get it right.
Reviews Icon | Six2Six Garage

5-star review by Brandon Nielson

Had some transmission issues from a previous shop that went south. Cody made sure that we were taken care of from the beginning. Once parts came in, they worked into the night testing things to get me back on the road as quick as possible! Know their stuff and am returning to get more custom parts installed!
Reviews Icon | Six2Six Garage

5-star review by Nick Johnson

My truck broke down literally 2 days before we were supposed to go on a road trip to visit family. I brought the truck in the day before our trip anticipating I would have to leave it there and the 6 of us would have to cram into a smaller vehicle for the drive. They realized my dilemma and got my truck back to me that very same day. You're not going to find service like that at any dealership or most shops for that matter.

5-star review by Jessie Nail

Owner was beyond helpful and extremely knowledgeable. I could not have been happier with the experience and service. We were in and out extremely quickly. Will definitely be going back!!!

5-star review by Shawn Bowen

Cody and his crew really helped me out. My family and I were on vacation and getting ready for our 1,400 mile trip home and my truck had an oil leak and the a/c went out. Cody fit me in and fixed both the oil leak and a/c. I highly recommend this shop for anyone looking for basic repairs or diesel performance upgrades. Thanks so much Six2Six.

5-star review by Jayden Leija

Great Cummins mechanic especially with motors with after market work done. I was out of town and had an old problem resurface and they knew the solution. I've had multiple people check it out and there the first person to ever get it right.

5-star review by Brandon Nielson

Had some transmission issues from a previous shop that went south. Cody made sure that we were taken care of from the beginning. Once parts came in, they worked into the night testing things to get me back on the road as quick as possible! Know their stuff and am returning to get more custom parts installed!

Built on Trust, Not Upsells

Six2Six Garage was founded on a simple idea: repair work should be honest, thorough, and easy to understand.

We're veteran-owned, and that shows in how we operate: disciplined, accountable, and focused on getting it right. Our team brings decades of hands-on diesel and automotive experience, plus nearly twenty years of service-industry leadership shaping the way we treat every customer who walks through the door.


As a thank-you to those who serve, we offer a 10% military and first responder discount, up to $250.

24/24 WARRANTY SHIELD | Six2Six Garage

PARTS / DIY SOURCING

Need a Part? We Can Help. 

Not ready for a full repair, or tackling it yourself? We can source quality parts through our trusted supplier network — just ask, and we'll get you what you need.

Flexible Payment Options 

We offer financing options to help you plan your repair on your terms. Ask our team for details.

Klarna | Six2Six Garage

Klarna

Affirm | Six2Six Garage

Affirm

Sunbit | Six2Six Garage

Sunbit

Visit Us in Fort Collins

Visit our shop at  1925 S Timberline Rd Unit S8, Fort Collins, CO 80525  or call us at (970) 893-2893 for expert auto repair and maintenance

  • Loveland
  • Windsor
  • Greeley
  • Longmont
  • Boulder
  • Berthoud
  • Johnstown
  • Milliken
  • Timnath
  • Wellington
  • Severance
  • Evans
  • Firestone
  • Frederick
  • Mead
  • Dacono
  • Lyons
  • Estes Park
  • Laporte
  • Bellvue