In the early days if you bought a set of pads via Holden P&A department you received a set of 4 bolts with red Loctite compound on them.
They were considered as a single usage bolt, but time has proven that you just lift the caliper off it's anchor mounts and replace the pads that way, thus not undoing the slide bolts as suggested in their service literature.
In actual fact I've never undone those bolts as I always separate the two halves of the caliper and clean the slides and reapply new Synthetic Bendix Caliper Slide grease at pad change intervals.