Diesel Emissions Testing Services

Rocky Mountain Diesel & Auto Rocky Mountain Diesel & Auto is a Colorado State licensed Diesel Emissions Testing facility located in Greeley, CO. With the latest testing equipment, we can provide a fast and accurate test for your vehicle. We provide emission testing for all class 1-8 vehicles. No appointment necessary. Just stop by our shop and our technicians will have you in and out quickly. If your truck fails to pass, we will work with you to determine the best solution to ensure your vehicle is compliant.

Truck Being Tested for Emissions - Diesel Emissions Testing in Greeley, CO

Diesel Truck in Shop - Diesel Emissions Testing in Greeley, CO



Light duty

(below 14,000 lbs GVW)


Heavy duty

(above 14,000 lbs GVW)


Oversized Vehicles

Performance and Safety Testing

As well as emission testing, we offer these performance and safety tests for Class 6 and 8 vehicles:
lugdown tests, opacity tests, and road load simulations. We also provide VIN inspections.

No Appointment Necessary

At Rocky Mountain Diesel & Auto, no appointment is necessary for testing your vehicle. We are located in Greeley, CO at 150 E 18th Street. Call for more details at 970-356-2672.

MD Mustang Logo - Diesel Emissions Testing in Greeley, CO