After jacking up the car and removing the wheel , remove the brake pads and caliper. Take the dust cover off of the axle nut, remove the cotter pin and the nut. The rotor can be removed now and the bearing changed. Don't over tighten the axle nut when reinstalling.
No, the front hubs are sealed units on a Grand Cherokee.
In the brake rotors.
They are a sealed bearing and are not greaseable.
Change them. They are not serviceable.
See: http://autorepair.about.com/library/a/1i/bl841i.htm
It shouldn't require pressing to remove the bearings.
A Grand Cherokee is either rear wheel drive or four wheel/all wheel drive.
The 2007 Jeep Grand-Cherokee has rear wheel drive.
The 2010 Jeep Grand-Cherokee has rear wheel drive.
The 2008 Jeep Grand-Cherokee has rear wheel drive.
The 2001 Jeep Grand-Cherokee has rear wheel drive.
The 2006 Jeep Grand-Cherokee has rear wheel drive.