Air conditioner does not blow cold air

All cars of that year use r-134 refrigerant. Follow the ac lines till you run across the service port. The one near the evaporator (front of engine) is the high side; leave that one alone. It usually is marked with a red cap
the low side port is near the firewall, and usualy has a blue cap. The valve for a refill can usuallly will only fit on a low side. When filling the can will get very cold very fast. If the can doesnt start to get cold immediately, remove it you have it on the wrong side. Make sure to remove it immediately, as keeping it on the high side will pump liquid freon into the can causing it to explode.