Which is power antenna lead?
 

if I pull the panel where the right tweeter is, which wire is the power to the am/fm antenna?
thank you.

Since you didn't state a year or model, I'll take a generic shot.
The pink wire.

Yep pink wire!

which is what I thought, but when I hook the power antenna lead from the stereo up to the pink wire, it makes no difference in the signal. FM radio stations 35 miles away are just empty spots in the dial.

Your amplifier may be bad. Here is a thread for you. https://www.chevyhhr.net/forums/prob...problem-38716/

its not a premium system. I replaced the stock radio with a Kenwood but the stock stereo had the same horrible radio reception.

Not that amp, the antenna amp, did you even look at the thread I linked?