List for February 2025
** = Closed Temporarily
Light Duty Stations
Diesel Repair & Performance
6250 E Pine Lane Unit B
Parker, CO 80138
(303) 841-6527
Greeley Automotive Machine
404 8th Ave.
Greeley, CO 80631
(970) 352-4342
H&M Transmission and Automotive
500 2nd St.
Castle Rock, CO 80104
(303) 663-5578
J&J Diesel Dogs
15551 E. 6th Ave. Unit 70
Aurora, CO 80011
(303) 364-4244
AWD testing available
Lee Myles Boulder
6270 Arapahoe Rd
Boulder, CO 80303
(720) 726-7760
AWD testing available
Lundstedt Automotive, Inc.
1401 E. Lincoln Ave.
Fort Collins, CO 80524
(970) 221-9400
Performance Wise, Inc.
4395 Xenon St.
Wheatridge, CO 80033
(720) 898-0808
True Speed
11450 Huron St #R
Northglenn, CO 80234
(303) 305-3752
AWD testing available
Heavy Duty Stations
Iron Buffalo Inc.
5590 E. 55th Avenue
Commerce City, CO 80022
(303) 623-7049
MHC Kenworth
7007 Sandown Rd.
E. Denver, CO 80216
(720) 941-0833
Light and Heavy Duty Stations
Akisp Diesel Emissions
2531 W 62nd Ct, Unit K
Denver CO 80221
(720) 434 - 9343
Al’s Front Range Diesel
1115 Bowen Cir.
Longmont, CO 80501
(303) 776-6469
Branch Automotive and Diesel Emissions
6030 E. County Line Rd.
Highlands Ranch, CO 80126
(303) 771-2224
AWD Testing Available
Central Denver Diesel Emission
1400 W. Alameda Ave.
Denver, CO 80223
(303) 525-8490
Chase Automotive Repair and Service
15601 E. 6th Ave. Ste.60
Aurora, CO. 80011
(303) 344-4670
DTS. LLC-Evergreen
30515 Bryant Dr.
Evergreen, CO 80439
(303) 550-7250
Dynoman Diesel Emissions
10420 E. 106th Ave.
Brighton, CO 80601
(303) 288-4344
Engle Automotive
808 N. Denver Ave.
Loveland, CO 80537
(970) 635-9760
Excel Diesel
7591 Shaffer Pkwy. Unit A
Littleton, CO 80127
(303) 904-1500
Excel Diesel and SUV
736 Castleton Rd. Unit C
Castle Rock, CO 801096
(720) 524-6221
Excel Diesel and SUV
49 N. Ave.
Brighton, CO 80601
(303) 659-0442
Excel Diesel and SUV
9078 S. Woodman Way Ste. D
Parker, CO 80134
(303) 400-6040
Exhaust Readers
4202 N. Nevada Ave.
Colorado Springs, CO 80907
(719) 260-6629
Exhaust Readers II
5150 Edison Ave.
Colorado Springs, CO 80915
(719) 574-7063
AWD testing available
Hannah's Master Tek
786 Dayton Street
Aurora, CO 80010
(303) 367-0707
Hinsdale Automotive
119 W Littleton Blvd
Littleton, CO 80121
(303) 617-0152
AWD testing available
Houska Automotive Services
899 Riverside Ave.
Fort Collins, CO 80524
(970) 482-0156
L&N Diesel Emission Testing and Repair
1700 W. Mississippi Ave.
Denver, CO 80223
(303) 937-8485
AWD Testing available
Lake Arbor Automotive and Truck
1125 S. Garfield Ave.
Loveland, CO 80537
(970) 667-7396
Mountain Air Emissions
19356 Goddard Ranch Court
Morrison, CO 80465
(303) 697-6850
AWD Testing Available
Nelsen’s Auto Tech Center
361 ½ E. Mountain Ave.
Fort Collins, CO 80524
(970) 484-0834
Premier RV and Trailer Sales
1145 E. US Hwy 24
Falcon, CO 80831
(719) 425-2284
Proformance Diesel & Auto Repair
1119 S. Garfield Ave.
Loveland, CO 80537
(970) 667-7396
Rocky Mountain Diesel Emissions
9999 Brighton Rd.
Henderson, CO 80640
(303)288-5500
Rocky Mountain Diesel Services, Inc.
150 E. 18th St.
Greeley, CO 80631
(970) 356-2672
Straightline Auto & Diesel
2211 E. 49th Ave.
Denver, CO 80216
(720) 355-7164
Test My Diesel
11705 Teller St. Suite F
Broomfield, CO 80020
(303) 460-7786
The Maintenance Shoppe**
1298 W. Alameda Ave.
Denver, CO 80223
(303) 893-3247
TransWest Truck Trailer R.V.
20770 E. 1-76 Frontage Rd.
Brighton, CO 80603
(303) 289-3161
Windway Diesel Emissions
4940 Oneida St
Commerce City, CO 80022
(303) 385-1711
Contact Information
Please contact the DMV's Emissions Team at 303-205-5603.
Please contact the Colorado Department of Health and Environment at 303-744-2522.