2001 Buick Regal P0440 Code

[quote:f78df8f491="jb105"]Other Category problem
2001 Buick Regal V6 Wheel Drive Type unknown Automatic 79000 miles
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My service engine soon light came on and Pep Boys pulled a P0440 - evaporation system fault code. what could the problem be?

Thanks![/quote:f78df8f491]

I have the same problem with my 01 Regal. The light comes on when the fuel gage goes to below 3/4, shuts off when when the gas is 3/4 to full for a few days. Any ideas? I tried the new gas cap but it didn't help.