Chevrolet Repair: 06 Avalanche, radio antenna, bad reception

Question
I recently caught a guy wrenching on my radio antenna. Now my reception is very poor. I took it apart & looked ok, but still bad reception. There is a small clip on the end of the antenna needle.How is that supposet to assemble together.

Answer
HI DAN, THAT CLIP YOU ARE TALKING ABOUT IS AT THE BASE OF THE ANTENNA CORRECT ???IF IT IS THE CLIP THAT I AM THINKING ABOUT IS IS A GROUNDING CLIP.. IT JUST REST AGAINST THE METAL BODY...
IF YOU HOLD THE ANTENNA WHEN THE RADIO IS ON IS THE RECEPTION OK THEN. IF SO IT HAS LOST ITS GROUND..TRY TO BEND THE TAB,CLIP TIGHT AGAINST THE METAL BODY..LET ME KNOW IF THIS IS NOT WHAT YOU ARE TALKING ABOUT..TOM...