The Best Place in Denver for Diesel Emissions Testing!

Time for an Emissions Test for your Medium or Heavy Duty Diesel Truck? Stop by JECO now! We’re here 24 HOURS A DAY Monday through Friday, and 8-5 PM on the weekends. As long as your vehicle is 14,001 GVW or more, JECO is the place for you!

Licensed by the State of Colorado
Certified diesel inspectors
Only $100
We test while you wait!

Can't stay? No problem! JECO offers overnight servicing as well, with your truck ready and waiting for you in the morning!

Our Service

JECO Inc. is a small, independently owned repair facility that's your one-stop shop for all diesel repair needs! With its convenient location in Denver and its certified technicians, JECO will get you back on the road in a hurry! In addition to repairs, we’re currently offering Medium and Heavy Duty Diesel Emissions Testing for the State of Colorado!

  • Diesel vehicles only! Sorry, no gas vehicles.
  • Fleet testing options available, call for services.
  • 14,001 GVW or more.
  • 24 Hours a Day, Monday through Friday.
  • 8 AM to 5 PM on the weekends

Payment Options

  • JECO accepts cash, all major credit cards, and ESF Checks.
  • We do not accept personal or cashier's checks.
  • Need financing? JECO works with Interstate Billing Service, Element Fleet, and ARI for all your repair needs!

Get an emissions test done today!

No Appointments Needed
Certified Mechanics
Licensed and Insured
Certified Smog Testing Experts

24 hours a day, Monday through Friday
8 AM to 5 PM, Weekends

Give us a call:
(303) 706-1167