Recently my back left AGX shock has started to whine. It sounds like a very small leak that makes a high pitched noise. Sometimes it will do it as soon as I stop and the car is just sitting but mostly is does it just after weight is added to the rear of the car, such as a person sitting in the back seat. Is this something I need to be worried about and if so who do I contact to get it fixed? I bought these shocks off of e-Bay. Thanks!

 

It's not the shock, it's the EVAP system your hearing.