Look out, the "evaporative system fail" hit a raw nerve for me (really a nightmare)! A number of us had a vap valve fail which is up by the gas tank. But it triggered a specific code other than the "not ready" one. It's a $150 part but the GM method to get at it is to drop the tank which is a lot of labor $$. So $800 later it was fixed!
Although it's part of the emissions system, it is not covered! At the time some members here figured out how to get at it through the wheel well. The valve was tricky to remove and small hands helped. Thought I bring this up just in case. Of course a search will find the gory details.
I couldn't get into doing it myself because my inspection ran out trying to figure out what was going on and the guys that figured it out were also in the middle of it so the details were only starting to surface on the forums.
Also bad gas gaps were also part of the mess at the time.
Last edited by whatnext; 02-21-2015 at 04:26 AM.