I trying to add refrigerant to my 1999 chevy malibu and I just wanted to ask where I need to add it? help would be greatly appreciated.

I think I addressed this in a recent post, but . . . the port is near the rear of the car on the passenger side firewall. The AC inoet port is down behind the alternator.

The previous thread is here:

http://www.automotiveforums.com/vbulletin/showthread.php?t=267462