Hook up a/c refrigerant to the suction side. be careful to not add to much. you can buy a guage and r134a freon at wal-mart or pep boys for cheap.. but you can't buy r-12 if the system is still r-12 you should consider retrofitting to 134a
where do I add freon to my air conditioning unit on a 1997 chevy truck?
you dont only a certified repair shop can handle R12
to the low side
no
To add Freon to a 1992 Chevy Silverado 1500, first ensure the engine is off and the AC system is not running. Locate the low-pressure service port, typically found on the larger diameter aluminum line near the firewall. Attach the refrigerant can's hose to the port, then start the engine and turn the AC to maximum. Add the Freon slowly, checking the pressure gauge on the can, until it reaches the recommended level, then disconnect and securely replace the service port cap.
You can add Freon to your 1999 Chevy cooling system through the low pressure port. Connect your Freon bottle to the low pressure port and release the Freon into the system.
Freon is a very touchy thing to work with. The EPA bans its release into the atmosphere, so only experts and professionals know how to add and subtract Freon from the car safely. Take your car to a mechanic or a Chevy dealer for this.
The schrader valve on the low pressure side of the system.
This is what I did for my Chevy prism 2000, it works fine: http://www.id-usa.com/how_to_recharging.asp
Take it to an expert. You are not qualified nor do you have the equipment to do this.
remove air filter and you will see it It may actually be UNDER the air filter box, which will require removing the whole air box assembly. That's where it is on a 1999 Lumina.
The 2000 Chevrolet Silverado truck has two ports on top of the air conditioner compressor. You will add Freon through the low pressure port.