The factory radio uses two U shaped hooks to remove, while the Pioneer unit
uses two long flat hooks that have a raised edge at the end that grabs the
release mechanism when it locks. But they both use the same concept, when
pushed in and locked into place, pull outward and toward you and the unit
should slide right out. You will find the two sleeves in the center on each
side of the radio to insert the tools, after you remove the plastic trim
panel (not the face).