my friend has an bone stock 06 chevy hhr.prob is the radio is dropping kinda like a cell phone loses calls.i said i'd ask the experts,what do you think?i thought it might be the antennea connection in the back of the radio.she thinks its cuz her antenna is so small.

 

It could be the antenna connection or if the antenna is embedded in the winshield and she has an aftermarket metallic tint that could be it too.