Yes, SWC, Onstar, amp or not, etc. plus it hooks into the OBDII port (actually you hardwire it into 2 wires from the back of the connector) so the HU can display tons of info (which a full-screen HU might but IDK because mine just had an AM/FM/CD). Through the maestro, it can display screens like full engine gauges, vehicle info screen with TPMS, climate control, parking assist, etc. Things that are controllable can be done through the HU. The Pioneer has a data connector on the back just for the Maestro. All in one box that's about the size of a PAC SWC. Plus it's programmable so if you want to do things like bypass your factory amp, delete OnStar or not use parking assist you can do that. You hook it to your computer and go to their website, then it sees what unit you have and asks for your vehicle info and what HU you have and walks you through your options. It's pretty damn nice.
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