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I had a smog check on my 2008 chevy silverado about a year ago. It was the first smog check since new. It was all done via the OBD II port. The tech told me that tail pipe testing is no longer required on vehicles model year 2000 and later. The smog check took about ten minutes. This was in California. So, as long as the chip is not throwing CEL, it should be fine.
Last edited by CarguyF15; 09-22-2015 at 03:48 PM..
Reason: forgot a sentence
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