JW Diesel & Automotive Driven to Be the Best in Diesel & Fleet Repair Across Carbondale, CO and the Western Slope

WELCOME TO JW DIESEL & AUTOMOTIVE

At JW Diesel & Automotive, we treat every truck like it’s our own. Everything we do, from performance issues to full diesel repairs, reflects our commitment to quality. We’re not just here to fix trucks—we’re driven to be the best.

PROFESSIONAL

HONEST

QUALITY

Fleet and Diesel Truck Repair in Carbondale

Diesel is what we do best. Our team is factory-trained with real-world experience working on the trucks you drive—Cummins, Duramax, and Powerstroke. We understand downtime costs you money, so we prioritize uptime with fast, accurate repairs using OEM parts and dealer-level diagnostics. Whether you’re hauling equipment, materials, or livestock, we’ll keep your fleet running strong and your business moving.

Fleet Maintenance

Tailored service plans to minimize downtime and keep your trucks working.

Light-Duty Diesel Truck Repair

We provide expert service and repair for ½-ton, ¾-ton, and 1-ton trucks, all the way up to 2-ton workhorses. From poor fuel economy to loss of power or unusual smoke, we handle it all with diesel-specific tools and training that most general shops don’t offer.

Diesel Engine Repair

From turbo issues to injector failures, we provide accurate diagnostics and expert repairs on these trusted platforms:

Cummins
Duramax
Powerstroke

Backed by diesel-specific certifications and dealer-level scan tools, our team delivers results built on deep experience and factory-level training.

Auto Repair Services

Brake Repair

Pads, rotors, and hydraulic systems.

Suspension & Steering Repair

Smooth handling and safety.

Transmission Repair & Replacement

Diagnostics, rebuilds, replacements, and differential repair.

Engine Repair & Replacement

From minor repairs to full swaps.

A/C & Heat Repair

Includes systems with R1234yf refrigerant.

Electrical Diagnostics & Repair

Fast, accurate troubleshooting.

Fluid & Maintenance Services

BG Fluid
Services

Transmission, brake, coolant, driveline, and fuel system cleaning using BG’s professional-grade equipment and chemical systems.

Oil Changes & Fluid Maintenance

Synthetic, blend, and conventional options tailored to your diesel truck’s mileage, use, and manufacturer specs.

Diesel Fuel System Service

Fuel filter replacement, water separator maintenance, high-pressure injection cleaning, and more to protect modern diesel systems.

Factory Scheduled Maintenance

Based on manufacturer-recommended intervals to prevent breakdowns and extend vehicle life.

Inspections

We offer DOT, pre-purchase, and pre-trip inspections to ensure your vehicle is safe, compliant, and road-ready.

Performance & Diesel Upgrades

Want more torque, throttle response, or fuel efficiency? We offer performance upgrades that are tailored—not generic—and backed by hands-on installation.

Certified. Trusted. Proven.

Our technicians are ASE and Ford certified, EPA 609 qualified for A/C systems, and BG Services certified. We’ve trained with diesel industry leaders like Tony Salas and Mike Cleary, and continue to invest in education, equipment, and systems that support real-world results. Whether you run a single pickup or a full fleet, we bring the same level of care and expertise to every vehicle.

Clear Communication

Honest diagnostics and Digital Vehicle Inspections.

Preventive Focus

We help you avoid costly downtime.

Fleet Specialists

Fast turnarounds and consistent care.

Locally Rooted

Supporting hockey, rodeo, schools, and more.

Towing Partner

We work with Shaun's Towing for prompt, professional transport.

Vehicles We Service

While diesel trucks are our specialty, we also work on domestic brands:

Ford

Chevy

Ram

Dodge

Toyota

GMC

Backed by Warranty

We stand behind our work with a 12-month / 12,000-mile warranty on parts and labor.