SEMI TRUCK & TRAILER REPAIR

When your truck breaks down, you need immediate help. Our team offers quick diagnostics and on-the-spot repairs to get you moving again. Whether it’s an electrical issue, a fuel system problem, or roadside assistance, we minimize your downtime so you can stay on schedule.

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🛢 Oil Changes

Regular oil changes are key to keeping your engine running smoothly. We provide fast and efficient oil change services using high-quality oils and filters to extend engine life and boost performance.

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⚙️ Engine Repairs & Overhauls

From minor fixes to full engine rebuilds, our mechanics have the expertise to handle it all. We work with modern diagnostic tools to identify problems quickly and deliver long-lasting repairs that keep your truck reliable on the road.

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🚛 Suspension & Chassis Repairs

A strong suspension and chassis are essential for safety, handling, and load stability. We repair shocks, bushings, axles, and other critical components to ensure your truck drives smoothly and safely, even under heavy loads.

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🌿 DEF System Repairs

Modern trucks require properly functioning DEF systems to stay compliant and efficient. We handle DEF filter replacements, pump and injector repairs, and system diagnostics, making sure your truck meets emissions standards and avoids costly downtime.

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🔩 Trailer Repairs

Your trailer is just as important as your truck. We provide complete trailer repair services, including brakes, lights, axles, suspension, and bodywork. Our goal is to keep your trailer roadworthy and dependable for every haul.

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💻 Computer Diagnostics

We use the latest diagnostic software and equipment to quickly detect and troubleshoot issues with your truck. Our advanced computer diagnostics allow us to accurately identify problems in the engine, transmission, electrical systems, and aftertreatment systems, saving you time and preventing costly breakdowns.

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👨‍🔧 Experienced Mechanics

Our team of skilled, certified mechanics brings years of hands-on experience in semi-truck and trailer repair. We combine expertise with a commitment to quality service, ensuring that every job is done right the first time.

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📍 Located in Denver, Colorado — Mile High Truck & Trailer Repair is your trusted partner for keeping trucks and trailers on the road, running safely, and performing at their best.

ABOUT US

CONTACT US!

Greg Thompson

I broke down on I-70: the truck was jerking and the DEF light came on. I called Mile High — a mechanic arrived in about 40 minutes, ran diagnostics on the spot, cleaned the injector, updated the software, and forced a regen. In less than two hours I was back on the road. They clearly explained what went wrong and why, with no hidden upsells. Great team, minimal downtime, and very professional.”

Matt Walker

While hauling a time-sensitive load, the front suspension on my Kenworth T680 started making noise. Mile High quickly found worn bushings and shocks, and also checked trailer alignment. Parts were in stock, and by the evening I had the truck back. I really appreciated the transparent estimate (they called before every approval), photos of the old parts, and a proper test drive after repairs. The steering feels sharper now and it’s no longer chewing up the tires. Highly recommend!

John Carter

We service part of our fleet at Mile High: regular oil changes, brakes, electrical diagnostics, and trailer work. They really saved us one night when a Freightliner starter failed — they sent a mobile mechanic, replaced it on the spot, and checked the charging system. What I like most is their diesel mechanic: he finds the root cause fast instead of just swapping parts. Bills are stable, no surprises, and we’ve cut downtime a lot.

Brands We Service