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To do the pads, see the instructions in the PDF file below. As for the pad number, see the GM dealer or parts store. Centric is a good brand other then AC Delco.
CLICK HERE FOR PDF FILE DOWNLOAD
If you are doing just the pads, the E brake needs no attention paid to it. The only tools you will need are wrenches and a c clamp to squeeze the caliper piston back in. ITs an easy job.