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Certified Diesel Emissions Testing Center

Looking for an emissions testing center capable of handling 14,000 GVW or more? Iron Buffalo Diesel Dyno & Emissions has the largest team of certified diesel inspectors in Colorado. We fix emissions failures and get you back on the road quickly and affordably.

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Cement truck getting dyno and emissions service inspection

3 Convenient
Emissions Testing
& Dyno Options

Drop-off

Drop your truck and come back the next day.

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Schedule

Schedule an appointment online or by phone then come to the shop.

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Scheduled Pickup

For a nominal fee, we'll pick up your truck at a scheduled time and return it to you.

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Cummins ISX rebuild

More horsepower.
Better mileage.

Iron Buffalo Diesel Dyno & Emissions recently upgraded our Eddy Current Chassis Dynamometers. This new air-cooled dyno allows for quick power checks and other short tests of medium- or heavy-duty single- or tandem-axle trucks and buses (basically anything over 14,001 GVW).

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Emissions Testing Available 24/5
& 8AM-5PM Weekends

Denver, Colorado

Iron Buffalo Truck & Trailer

Iron Buffalo was founded over 40 years ago. Over the years, diesel maintenance and repair became the primary revenue stream, with ancillary services in metal fabrication (trailer flatbeds, pup trailers, and racks).

Austin White and Mike Schwarz lead Truck & Trailer with an aim to build a brand based on genuine customer service, honesty, and quality.

Read the Iron Buffalo Story
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer office staff
JE-CO Truck & Trailer mechanic
Austin White, Owner, JE-CO Truck & Trailer
JE-CO Truck & Trailer mechanic
Michael Schwarz, Owner, JE-CO Truck & Trailer
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer mechanic
JE-CO Truck & Trailer office staff

Customer Reviews

Kelsey Sailsbery

Great customer service. Happy to find a place that can do all the different varieties of work on my truck from tailgate to engine to tires👍

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Jay D

Great customer service.

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J Jamison

Quick easy very nice people very professional

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