Walk-In Smoke Opacity Testing in Glendora
Quick, no-nonsense diesel testing at Bay #4
Need a smoke opacity test but prefer to come to us? Our Glendora shop is located on Route 66, and our test-only location is fast, welcoming, and efficient.
At Darling Smog, we offer mobile CARB-compliant smoke opacity testing for fleets, trucks, buses, and RVs at our location in Glendora, CA.
What We Test:
Heavy-duty diesel trucks
School buses & fleet vehicles
RVs & motorhomes
Vehicles subject to CARB Clean Truck Check
Why Choose Darling Smog?
✅ Fully CARB-compliant
✅ Appointments by calling us or booking online
✅ No upsells, only testing
✅ Same-day and emergency slots may be available—please call or inquire online
We’re licensed, friendly, and efficient. You’ll always know what to expect. We’re here to make compliance easy.
Ready to Get Tested?
Pull up to Bay #4, give us the keys, and we’ll handle the rest. Get lunch near by while your vehicle is being tested and we’ll call you when it’s ready.
Let’s clear the air, one truck at a time.
