Well, today the engine light came on. I called Onstar to see what great help they might be. They said it was an Evaporative Emissions "issue" and he said to check the gas cap. I re-secured the gas cap and went on with my day. Tonight after work the light was still on so I called Onstar back to make sure it was the same thing, and it was. I asked the lady if there was a code associated with it and there was, but they are only able to give that out to dealerships, and GM techs issed: . I did a search and found some info, and one thing was a clogged vent line would cause the light and would also cause problems when filling the tank. When I do get gas, the pump shuts off all the fucking time and it pisses me off. I have to hold it a certain way and not pump full bore. I thought it was just a shitty design, but I'm beginning to think the problems are related. I plan on going to Autozone and get the real code. I will get back with those but if anybody has any suggestions, I'd like to hear them.