1978 Buick Electra Is the rear bearing on passanger press o

They are pressed in, but not how you're thinking, you use a bearing installer, it's a round metal disc with a handle sticking out of the center, using a hammer (32ounce ball pean works for me), line up bearing in the housing, put the tool on it and hammer the tool till the bearing walks in and seats, you'll need a slide hammer to remove the old bearing, if you have never done this type of work before, Take it to a Professional, you could get seriously hurt. Good Luck, Lou