Global Roadside Diagnostics

Clean Truck Check tester in Glendale, AZ.

Global Roadside Diagnostics appears on CARB's public list of credentialed Clean Truck Check testers. It lists mobile testing, OBD testing, motorhome testing. Mobile testing means the tester can come to your yard or job site.

Location
5919 W Tina Ln, Glendale, AZ 85310
Phone
(602) 380-7097
Mobile testing
Yes — comes to your yard
OBD testing
Yes
Smoke opacity (non-OBD)
No
Motorhomes
Yes
Credentialed testers
1
Last verified

Call (602) 380-7097 Open in Google Maps

Before you call

  • Have your VIN, odometer reading and plate number ready.
  • Your vehicle must be registered in CTC-VIS and the annual compliance fee paid; the tester submits the result to CARB.
  • Ask for the price per vehicle and any mobile trip fee. Typical published prices for an OBD test are $50–$135 per vehicle (see cost guide).

Which trucks Global Roadside Diagnostics can test

The test CARB requires depends on the engine's fuel and model year. Based on the services Global Roadside Diagnostics lists on CARB's tester list:

Your vehicleTest requiredThis tester
Diesel, model year 2013 or newerOBD scanYes
Alternative fuel (natural gas, propane), 2018 or newerOBD scanYes
Diesel, model year 2012 or older (no OBD)Smoke opacity test (SAE J1667) plus visual inspectionNot listed
California-registered motorhomeSame test as above by engine year, once a yearYes

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Xavier Villabol in Phoenix, about 13 miles away. See listing.

Clean Truck Check testers in Arizona

Global Roadside Diagnostics is one of 43 testing businesses in Arizona on CARB's public tester list. 36 of them offer mobile testing and 9 do smoke opacity tests. Testers outside California.

When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the deadline guide. You can test up to 90 days before a deadline. Get a free email reminder before each one.

How to check a tester's credential

CARB publishes its Clean Truck Check tester list, where Global Roadside Diagnostics appears as of November 1, 2026. Listing there is optional, so a missing name does not always mean a tester is not credentialed. After the test, check that the passing result shows for your vehicle in CTC-VIS; that is what counts for compliance.

Frequently asked questions

Does Global Roadside Diagnostics offer mobile Clean Truck Check testing?

Yes. Global Roadside Diagnostics says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

Can Global Roadside Diagnostics test a 2012 or older diesel truck?

Global Roadside Diagnostics does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is Xavier Villabol (about 13 miles). Trucks from 2013 on get an OBD scan instead.

How much does Global Roadside Diagnostics charge for a Clean Truck Check?

Global Roadside Diagnostics has not published prices with us; call (602) 380-7097 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the cost guide.

Is Global Roadside Diagnostics a CARB-credentialed tester?

Global Roadside Diagnostics appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

Other testers near Glendale

Source: CARB's public Clean Truck Check tester list, last checked . Listing on CARB's list is optional for testers, so some credentialed testers are not shown. Services, hours and prices change; please confirm with the tester before you go. Something wrong? Send a correction.

Call (602) 380-7097