Just bought a 06 Impala SS. Have not had to have an oil change yet, does anybody if the new Impala's have to be greesed or are they sealed. If no greese job is necessary I may do the oil changes myself.

 

You can do the oil changes yourself, I have not seen anything you could greese factory unless it is atleast 20 something years old, and I think even those were sealed.
If you do your own oil changes keep your recipets. They can get you for that one on the warranty if you have a problem.