commodore vx ls1

the AC air flow only going out from windshield side ( even i change the selector ) and i start hear hissing or air leaking voice behind the dashboard near one month ago , hope if anyone have any idea about this problem . i found one post hear talk about mainfold back hose but the...

Hey guys basicly bought this car months ago and havnt driven it due to loss of license but when i do move it or take it for a test run up the street and back when turning left or right whether it is at a T intersection or a round about there is a loudish knoc noise down near the passenger side...