You don't. In the 1991 Pontiac Grand Am, the wheel/hub assembly is pre-built at the factory and as such, can not be disassembled for maintenance. If you are having trouble with lubrication or worn bearings, you must replace the entire assembly.
If you are talking about the hub bearings , you can't grease them , they are a sealed unit .
A wrench
Yes, on Buick Century 1991 you need to replace the whole hub, it is much easier than replacing individual bearings.
yes they do. I have a 1991 Honda civic and I needed to press them in and I believe they have the same front end.
the fuse box on a 1991 ford grand marquis is located right under the steering wheel
This buzzing indicates that the wheel bearings need to be replaced on your front left wheel. This can be fixed by changing the bearings themselves or replacing the entire wheel hub.
there are a total of 4 wheel bearings on the front both sides have an inner and outer bearing. the outer bearing is visable when you remove hub the inner bearing is visable when you remove rotor
you have to press it out and press the new one in just make sure you tighting it real good
Remove the tire and wheel. Remove the axle end cap. Remove the wheel bearing nut. Remove the wheel bearing seal. Remove the wheel bearing. Reverse the process to install the new wheel bearing.
This is a very hard job without the proper equipment. Not recommended for the novice. It will also depend which bearings you are asking about, front or back. Both equally hard to do.
ANSWERING MY OWN QUESTION....YES ITS THE WHEEL BEARINGS.... You have ruled out all the causes for yourself. Why would you be asking the question? Yes, it seems that it would be the Wheel Bearings
YOU HAVE TO TAKE THE HUB ASSEMBLY OFF AND HAVE A SHOP PRESS THE BEARING,OR REPLACE THE HUB ASSEMBLY FROM A SALVAGE YARD.