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Diesel Emissions Testing and Repairs for Light & Heavy Duty Trucks and diesel cars testing, centrally located in Denver Colorado.

1400 West Alameda Avenue and the corner of Pecos Street. We are an authorized independent State of Colorado Diesel Emissions Testing Station. Air Care Colorado and Envirotest approved. Diesel emissions testing has been performed at this same location since 1990! Colorado State Emissions License #20689B.


We have the service value for diesel emissions testing in Denver Metro!

Light Duty & Cars
Front Wheel Drive Vehicles
Heavy Duty Vehicles
MotorHomes - RVs and Buses

Our emissions testing is by APPOINTMENT ONLY! Please call (303) 525-8490 to make the appointment! “Walk ins” are welcomed, but there is a strong possibility of a long wait before we can fit you in. Therefore, please call ahead.

Our Hours are 8:00 AM to 5 PM weekdays only!

Motorhomes, buses & RV Hours are as follows:
10:00 AM to 11:30 AM & 1:00 PM to 2:30 PM
(this is due to the local school hours)

14’ tall door into our Garage

20% off any diagnostics by Diesels Only when you get your emissions testing done here.

Diesels Only is THE place in Denver to get your diesel repairs and maintenance done. From brakes and suspensions all the way up to rebuilding the diesel engines to spec conditions.

A to Z repairs on all light and medium duty Diesel vehicles! Fleet Accounts are welcomed.

We are located at the same address as Diesels Only diesel repair and rebuilding.

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Below are some of the makes of vehicles for which we perform diesel emission testing:

VW
Fordtrans
Acuratrans
BMW300w
Chryslerthenewtrans
Hyundaitrans
Nissan300w
PeugeotCitroen
KIA
Mitsubishi
Mazda
MarutiSuzuki
Porschetrans
MitsubishiDieselEngines
Audi
Cumminstrans
DetroitDiesellong
fDiesel
Freightliner
Peterbilt
Sterlingtruckstrans
Hinotrans
UDtruckstrans
turboDiesel
PorscheTurboDiesel
Porschetrans1
CadillacDiesel
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Detroit400x374
JohnDeere460x361

Central Denver Diesel Emissions Limited
1400 West Alameda Avenue, Denver, CO 80223 - (303) 525-8490