Chevrolet Repair: 96 camaro, tail pipe, gas tank

Question
there is a knocking sound coming from which i feel is the back of car  i replaced the shocks as per dealership diagnoses still there it is not tail pipe or gas tank loose the sound sounds exactly like the tail pipe is loose but i know it is not thank you

Answer
I can't tell you for sure without being there to listen to it myself. But what I can tell you is that if you have had it to the dealership once and had the shocks replaced you should be able to take it back to them and tell them the noise is still there. They should have to take it back and find the problem without any question or argument.