then how do l wire my amp to the acc to not run my batery low?

On a monte carlo stock radio there were three,one operated the power antenna,one the optional amp the third was open and ran to nothing.So l assumed that all three were [remote]wires to run an remote accessory as well. The red was a switched 12V pos. Orange was [constant] 12V pos [memory] l hope this helps.
''BRILLIANT''!!!!

There is no accessory wire in a Cobalt stock radio plug. The factory radio is controlled by the vehicle is computer through a data wire. If you're installing an after-market deck, you will have to find another source of accessory power.