Gray and Sons Fleet Inspections
Clean Truck Check tester in Temecula, CA (Riverside County).
- Mobile testing
- Smoke opacity
- Motorhomes
Gray and Sons Fleet Inspections appears on CARB's public list of credentialed Clean Truck Check testers. It lists mobile testing, smoke opacity (non-OBD) testing, motorhome testing. Mobile testing means the tester can come to your yard or job site.
- Location
- 43446 Calle Carabana, Temecula, CA 92592
- County
- Riverside County
- Phone
- (951) 515-6804
- Mobile testing
- Yes — comes to your yard
- OBD testing
- No
- Smoke opacity (non-OBD)
- Yes
- Motorhomes
- Yes
- Credentialed testers
- 1
- Last verified
Call (951) 515-6804 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 Gray and Sons Fleet Inspections can test
The test CARB requires depends on the engine's fuel and model year. Based on the services Gray and Sons Fleet Inspections lists on CARB's tester list:
| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Not listed |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Not listed |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |
Clean Truck Check testers in Riverside County
Gray and Sons Fleet Inspections is one of 251 testing businesses in Riverside County on CARB's public tester list. 233 of them offer mobile testing and 102 do smoke opacity tests. In Temecula itself there are 18 listed businesses, 15 of them mobile. All testers in Riverside County.
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 Gray and Sons Fleet Inspections 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 Gray and Sons Fleet Inspections offer mobile Clean Truck Check testing?
Yes. Gray and Sons Fleet Inspections 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 Gray and Sons Fleet Inspections test a 2012 or older diesel truck?
Yes. Gray and Sons Fleet Inspections lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See OBD vs smoke opacity.
How much does Gray and Sons Fleet Inspections charge for a Clean Truck Check?
Gray and Sons Fleet Inspections has not published prices with us; call (951) 515-6804 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 Gray and Sons Fleet Inspections a CARB-credentialed tester?
Gray and Sons Fleet Inspections 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 Temecula
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DR CTC Mobile Compliance
- Mobile testing
- OBD test
- Motorhomes
-
Dustin Owen
- OBD test
-
G 2 G OTR
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- OBD test
- Smoke opacity
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-
GR Clean Truck Check Mobile LLC
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- OBD test
-
MRC Heavy Equip. Xperts
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- OBD test
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-
Smog Brothers HDI/M
- Mobile testing
- OBD test
- Smoke opacity
- Motorhomes
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.