I have a question for all of you Hummer experts. My check engine light is on and the code on the computer is P0452 which basically is the fuel..aka gas cap. The gas cap has been replaced and I've read through hours of research to check the vacuum lines at the canister by the fuel tank...done that, all appear to be good. Anyone have any ideas other then taking the light bulb out of the dash or elect taping the light.