HEAVY DUTY TRUCK REPAIR DENVER - SEMI & DIESEL SPECIALISTS

At our Denver diesel repair shop, we specialize in heavy duty truck repair Denver drivers trust for precision, speed, and lasting results. Whether it’s semi truck repair Denver owner-operators rely on to keep loads moving or in-shop diesel engine service for local fleets, our certified technicians bring decades of hands-on experience, advanced diagnostics, and the right tools to get you back on the road fast. From brake and axle repairs to complete engine rebuilds, we deliver repairs done right - the first time. explore our diesel truck services we offer in Denver Metro area!

Schedule Your Diesel Truck Repair Today! Explore Our Semi Truck Services

Semi Truck Repair Denver - Fast Turnaround You Can Count On

Every hour your truck is down costs you money. Our semi truck repair Denver service is built around speed without sacrificing quality. From DOT inspections to electrical repairs and drivetrain work, we use OEM parts, factory-approved procedures, and real-world expertise to get you rolling again - safely and on schedule.


We work closely with owner-operators and fleet managers to minimize downtime, offering same-day service for many repairs. Whether you’re dealing with engine performance issues, air brake problems, or suspension wear, our ASE certified diesel mechanics bring years of experience working on Freightliner, Peterbilt, Kenworth, Volvo, and other leading brands.

Diesel Engine & Heavy Duty Component Repairs

Our technicians handle everything from diesel engine diagnostics and injector replacements to turbochargers and aftertreatment systems. When you need heavy duty truck repair in Denver, we provide the technical skill and equipment to restore your truck’s performance and reliability.

Emergency Heavy Duty Repairs in Denver

Breakdowns don’t wait for business hours. Our Denver team offers emergency heavy duty repairs for semi trucks and diesel rigs so you can minimize downtime and avoid costly delays. One call connects you to certified mechanics ready to get you moving again.

Need Fast Diesel Truck Repairs? Call Us Today!

Serving truck owners and fleets across the greater Denver area.

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Call Today! 720 477-7781

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 Diesel Truck Services We Provide:

Our professional diesel truck mechanics Denver offer a full range of in-shop services for heavy duty trucks, semi-trucks, medium duty trucks, and commercial/fleet vehicles. Our ASE certified technicians provide everything from engine diagnostics and suspension service to after treatment system service and trailer maintenance. Whether it’s for fleet management or for your own rigging, we provide reliable repairs to get you back on the road. Check out all of the services we offer below:

Trailer & Reefer Unit Repairs

Whether you have semi trailer or need an emergency reefer repair, we offer you immediate, highly trained and knowledgeable trailer and reefer repair. You can put your trust in our hands - We are the top locally trusted diesel mechanic shop in the metro area.

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Semi Truck Repair

We specialize in semi truck repairs keeping your rig running smoothly - all year round. From engine diagnostics to transmission repairs, our expert technicians provide fast, reliable service to get you back on the road. Call now to schedule your semi truck repair!

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Truck Suspension & Powertrain Repairs

A failing suspension can cause steering issues, uneven tire wear, and poor handling. At Diesel Repair Denver, we offer expert truck suspension repairs, including powertrain issues and diagnostics - ensuring a smooth and safe ride. Contact Us today for suspension inspections and repairs!

CALL FOR SUSPENSION REPAIRS

Aftertreatment Services

We diagnose and repair all diesel aftertreatment issues, including DPF, DEF, EGR, sensors, and regen system failures. Whether you’re dealing with forced regens, check engine lights, or DEF dosing problems, our team keeps your truck compliant and running clean.

FIX EMISSIONS ISSUES NOW

Charging & Battery Issues

Our professional techs are experts at diagnosing and repairing diesel truck batteries and charging issues. We do alternators, starters, wiring and deep-cycle battery changes.

Call For Battery Issues

Brake System Failures

We provide complete diesel brake repair with air brake system diagnostics, hydraulics systems, pad and rotor replacement, and DOT inspections for our commercial truck customers.

Book Brake Inspection

Transmission Repair

Reliable transmission repair for commercial trucks. We offer rebuilds, clutch replacements, transmission replacements, fluid leaks and diagnostics for both automatic and standard systems.

Schedule Transmission Repair

Diesel Truck A/C Repair

Receive quality diesel truck A/C repair. We do it all - Compressor swaps to refrigerant recharge - we'll have your cab cool again in no time for your semis and heavy-duty trucks.

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Oil Change & Maintenance

Quick & affordable diesel oil changes. We rely on high-mileage synthetic blends and check filters, belts, and fluids to keep your diesel engine running at top condition. We work on both semi-trucks, heavy-duty, medium duty and pickups.

SCHEDULE OIL CHANGE

Fuel System Diagnostics

Get fast, reliable diesel fuel system diagnostics for commercial, heavy-duty, medium duty, and pickups. We handle diagnostics, injector cleaning, fuel pump replacement, and fuel line repairs to keep your engine performing at its best.

SCHEDULE FUEL DIAGNOSTICS

Cylinder Head Repair

We specialize in hydraulic cylinder repair and diagnostics for heavy-duty trucks, semi-trucks and medium duty trucks. Whether it's cylinder head replacement, rod repairs, resurfacing the deck, liner replacement or full pump kit installs, our team restores your hydraulic systems for top performance.

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Def System & Regen Issues

Trouble with your DEF system or regen cycles? We diagnose and repair DEF-related issues fast - from sensors and dosing valves to forced regens and check engine light resets. Our goal is to eliminate check engine lights to be in compliance with emissions.

SCHEDULE EMISSIONS SERVICE

Turbocharger Repair & Replacement

Boost performance and fuel efficiency with our expert diesel turbocharger repair. We diagnose boost loss, noisy turbos, power loss, smoke issues, and failed seals - and offer full turbo replacements & rebuilds when needed. Get your power and reliability back on the road.

BOOK TURBO REPAIR TODAY

Diesel Engine Diagnostics

Check engine light on? Our advanced diesel diagnostics quickly pinpoint problems like sensor failures, fuel issues, electrical faults, and power loss. Using dealer-level tools, we’ll scan your truck, decode fault codes, and get you back on the road with confidence.

SCHEDULE DIAGNOSTICS APPOINTMENT

Engine Rebuilds/ Repairs

We handle full diesel engine rebuilds and in-frame repairs for heavy-duty trucks and semis. Whether it’s power loss, overheating, or a complete engine failure, our expert technicians restore performance and reliability the right way.

BOOK ENGINE REPAIR

When your diesel truck requires professional in-shop service, you’ve come to the right place. Our experienced ASE Certified mechanics are skilled in everything from engine diagnostics and turbocharger repair to brakes, cooling systems and beyond, and they all do this from one welcoming location. We provide service to the Denver, Westminster, Thornton, and surrounding areas and have built a loyal following of truck owners who want the highest level of service without the dealership prices. Ready to have your truck in the best shape ever? Call us today to book your service.