Diesel Repair in Johnstown, Colorado
At NoCo Diesel & Auto, we specialize in diesel engines, with a particular focus on GM Duramax trucks. Whether it’s a light-duty pickup, heavy-duty truck, or a commercial vehicle, our ASE-certified technicians provide accurate diagnostics, expert repairs, and reliable maintenance to keep your diesel running strong.
Duramax Diesel Specialists
Our team has extensive experience working on all Duramax models, including LB7, LLY, LBZ, LMM, LML, and L5P. From injectors to fuel systems, turbos, and emissions systems, we understand the unique needs of these powerful engines and know how to keep them performing at their best.
Common Diesel Repairs We Handle
Fuel injector replacement and service
Turbocharger repair and maintenance
Fuel system diagnostics and repairs
Emissions system maintenance
Glow plug replacement
Heavy-duty truck and semi repairs
Preventative maintenance for fleet and commercial diesel vehicles
Why Choose NoCo Diesel & Auto for Diesel Repairs
Expertise
ASE-certified technicians with specialized Duramax knowledge
Honest Service
No upselling, only the repairs your vehicle actually needs
Reliable Results
We stand behind our work and make sure your diesel runs right
Personalized attention
Every customer gets the same care and consideration
OUR PROMISE TO YOU
We stand behind every repair we do. If something isn’t right, we’ll make it right — and we’ll work through it with you. That’s how a small-town shop should operate.
rated 5 stars on google
“Best and Most ethical Mechanic I have worked with. Pricing is always extremely reasonable and fair. Worth his weight in Gold.”
– James Trull
CALL TO SCHEDULE SERVICE
Phone is the best way to reach us — give us a call to book your appointment.