P 0496 Cadillac Cts 2011. Start by checking the "Possible Causes" listed above. I changed the gas cap, disconnected the positive.
The Cadillac had the malfunction indicator lamp on during the smog test ( I had forgotten that!).
After doing some research, this code comes up on a broad range of GM cars so I had the valve replaced today at a Cadillac Forums is the perfect place to go to talk about your favorite Caddys including the ATS, CTS, SRX and Escalade.
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Evaporative Emission System Flow During Non-Purge. First off I want to say hello and thanks for any help in diagnosing my problem. I changed the gas cap, disconnected the positive.
