Mobile CARB Clean Truck Check across Chico, Oroville, Paradise, Gridley and up the valley to Red Bluff and Redding. We test diesel trucks at the ranch, the landing or the job site. No travel fees, no long haul to a station.
The North Valley runs on diesel — harvest trucks hauling rice and almonds, log trucks dropping off the Sierra foothills above Paradise, and dump trucks still rebuilding the ridge. We bring mobile Clean Truck Check testing the length of the upper valley: Butte, Glenn, Tehama, Sutter and Yuba counties, reaching Shasta County to the north. We run Highway 99 from Gridley and Biggs through Chico, hop over to I-5 past Orland and Corning, and head up to Red Bluff and Redding. Out here a "nearby" testing station can be an hour each way — so instead of burning a half-day, you tell us where the truck parks and we bring the test to it.
If your diesel vehicle has a GVWR over 14,000 lbs, California's Clean Truck Check (HD I/M) program requires periodic emissions testing. Check your VIN status first at carbcleantruckcheck.app, then call us to lock in a time that works around your harvest or hauling schedule.
Same price whether you're at an orchard outside Durham or a log landing up in Magalia — we don't tack on travel fees for the long valley runs.
On-board diagnostics test for 2013-and-newer diesel engines. Fast plug-in, results uploaded to CARB.
Opacity / visual inspection tier of Clean Truck Check. Call and we'll confirm the right test for your truck.
Snap-acceleration smoke opacity test for 2012-and-older diesel engines that can't run OBD — common on older ag and log rigs.
Mobile diesel motorhome testing at your driveway, storage lot or RV park.
Running a whole harvest crew of trucks? Call 916-890-4427 for fleet pricing → See the full Clean Truck Check rates.
If your diesel engine is 2013 model year or newer, it has an on-board diagnostics port. We plug in, pull the emissions data and submit it to CARB. Quick and clean — most trucks are done in minutes, even between loads at the huller.
A lot of North Valley iron is older. If your engine is 2012 or older, there's no OBD data to read, so it gets a SAE J1667 snap-acceleration smoke opacity test instead. Not sure which applies to that old harvest hauler? Call and read us the engine year — we'll tell you.
The Highway 99 ag belt around Gridley, Biggs, Durham and Chico runs on harvest trucks and nut haulers. We bring J1667 smoke testing straight out to the ranch or the dryer — no pulling rigs off the field during harvest.
Log trucks working the Sierra foothills above Paradise, Magalia and up toward Lassen need to stay legal too. We meet you at the landing, the mill yard or the shop before the next run.
Rebuilding on the ridge and growth around Chico keep dump trucks, water trucks and equipment haulers busy. We test at the active job site so the crew keeps moving.
Trucks running the I-5 and Highway 99 corridors between Sacramento, Red Bluff and Redding stop for testing wherever they yard up for the night.
City, county, Cal Fire support and Chico State area service trucks — we schedule on-site testing with PO and NET 30 billing so the fleet stays compliant.
One truck parked at the house in Oroville, Paradise, Orland or Yuba City — we'll come to you. No fleet required, no trip down the valley.
Primary towns below, plus the surrounding communities across Butte, Glenn, Tehama, Sutter and Yuba counties — and up into Shasta County. Don't see yours? Call — we likely cover it.
We test 7 days a week, including Saturdays, with early-morning and evening appointments so your trucks aren't sitting idle during harvest, a haul or a logging run. Tell us when the rig is back at the yard, the landing or the dryer and we'll work around it. Same-week and next-day slots are usually available the length of the North Valley.
We cover the whole upper valley. Chico, Oroville, Paradise and Gridley are core territory, and we regularly run up Highway 99 and I-5 to Corning, Red Bluff and Redding. Tell us the town and we'll confirm the day — no travel fee inside the North Valley zone.
Yes — that's exactly what mobile testing is for. We line the trucks up at the ranch, the huller or the dryer and run them back-to-back so you're not pulling rigs off the field. Call for fleet pricing and we'll find a window that doesn't cost you harvest time.
Absolutely. Older logging and ag engines (2012 and earlier) get the SAE J1667 snap-acceleration smoke opacity test instead of an OBD read. We bring the smoke meter to the landing or the shop, run it, and submit the official result to CARB.
We cover the rest of the valley too. Jump to the nearest zone:
Call or text to schedule mobile CARB Clean Truck Check testing at your location — Chico, Oroville, Paradise, Gridley, Yuba City or up to Red Bluff and Redding. Fleet and harvest-crew pricing available.
