Stereo & Electronics - Which wire to tap into for accessory in factory harness

Just a quick question,

Which wire can i tap into the factory harness for my amp's accessory wire?

2001 camaro, non monsoon

If you mean a remote turn-on wire for an amp, there isn't a factory equivalent. About the best you can do is use the yellow retained accessory power (RAP) wire in the black connector. It has power whenever the ignition is on and until a door is opened after shutting off the ignition.