I live in Santee and have used the Smog Only station on the corner of Magnolia and Mission Gorge Rd for years untill my '87 didn't pass this year. I won't use that station again because the owner/operator doesn't speak good enough english for me to understand what to do about it not passing. He gave me a packet about the state assistance program (which isn't even going anymore).
I just met the owner of Pepper Drive Test Only in El Cajon and talked to him about my trucks smog issues. I will definately be bringing my truck in there once I run a tank with the Rxp additive through it to lower the Nox. His name is Mark Holt and seems like a pretty cool dude. He told me a few tricks to do to lower the Nox and I've heard them before but just that a smog guy told me about them makes him ok in my book.