noise coming from a/c when the engine is turned off. on 2008 Chevrolet Impala

every time the engine is turned off there is a ratteling noise from the a/c. this goes on for a min. or more. the noise is there sometimes when we come back to the car.

by in North Las Vegas, NV on August 30, 2010
1 answer
ANSWER by , February 02, 2011
THIS IS PROB A NORMAL NOISE! IF ITS A HISSING NOISE ITS THE A/C SYST EQUALIZING ITSELF WHICH IS NORMAL THANKS LEE 702-629-2273