G&S SMOG CHECK CTR
Serving the Glendora, San Dimas and surrounding area
Open 6 days a week, GNS Smog Check is your official State of California Licensed STAR certified Smog Test Only Center. We can inspect and certify nearly all vehicles, including Gross Polluters!
Our goal is to quickly inspect and certify your vehicle, We are conveniently located on E. Arrow Hwy between N Valley center Ave & S. Sunflower Ave. in Glendora at 1061 E. Arrow Hwy C1.