My 2006 GX while in park, drive, reverse, and even when the engine is off and the keys are turned to the on position will have a continous vibration. It kicks in sometimes almost like its the engine fan but the whole car vibrates including the sterring wheel and column...anybody else have this problem? or help?

check out the engine mounts and the suspension mounts

Did you say your car vibrates when the engine if off?? Holy crap, I have never heard that one before.

i think i figured it out but i didnt mean the engine is off...i meant the engine is off and the keys are in the on position....but im pretty sue its that a/c fan...because when i turn off the air, the vibration stops. its just the noise and vibration from the fan is ridiculous and very annoying