I was reading some posts on LOST about the caliper slide bolts corroding and binding - thus brake drag, (salt on the road in winter was seen as a contributor I think). The fix seemed to be pulling the slide bolts and removing the corrosion and lubing with silicon grease (Permatex sells a disc caliper slide grease at Supercheap). One guy claimed there was no grease put on by the factory and that made corrosion more likely. I did not save the search that uncovered that but you can probably locate it with keywords: brake caliper grease.
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