"my headunit wont kick on thru the remote output."
It sounds like you're trying to turn on the headunit by powering it with the remote out of the Clarion. That can't be right.
You don't hav eto use the remote wire to power anything you are talking about. That is used solely to provied a very, very small amount of current to a sensor to turn on an amp
For both the Clarion and the Sony the red wires (on both) should be tied to a switched 12v+ source (in your car, the yellow wire)*, and the yellow wire on the Clarion and Sony should be connected to a constant (always on) 12v+ wire. On your car that is the orange wire.
*I used this site for wire color codes. I can't be 100% positive that they are correct, so double check with a DMM just to be sure.
2002 Chevrolet Monte Carlo Car Stereo Wiring Diagram