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Here is a video that will demonstrate getting the top and front off your dryer;
The bearing plates that you are referring to are the drum slides (part numbers WE1M481 and WE1M333).
Here is a video that will show you how to replace the
While you have your dryer apart you may as well replace the drum bearing kit (part number WE25M40). Here is a couple of videos that will best demonstrate replacing the drum bearings;
You will also need to check the motor and blower areas, and make sure the squeak is not coming from there.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services
Here is a link that you may use to view the parts list diagram and for parts purchases;
Sears Parts Direct
I hope this is helpful. Check the things I have covered here, and if I may be of further assistance as more details become available, please reply to this post.