Okay....So...I was listing to sound clips on the net of couplers that are bad the sound I heard sounds JUST like that! BUT! I only got that sound when the engine was good and warm and had been driven hard. I was talking to Bio last night and he somewhat agrees that if it is the coupler it should make the sound at ALL times. Im going to go ahead and remove the snout to look at the coupler to be sure. BUT I have to wait until I can get a replacement SC drain plug. It will be in tomorrow because no GM dealership has one in the state of Arkansas! Or does anyone know what size it is? Maybe a bolt would work.
