where do I add freon to my air conditioning unit on a 1997 chevy truck?
The schrader valve on the low pressure side of the system.
The 2000 Chevrolet Silverado truck has two ports on top of the air conditioner compressor. You will add Freon through the low pressure port.
to the low side
no
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.
This is what I did for my Chevy prism 2000, it works fine: http://www.id-usa.com/how_to_recharging.asp
they did it in 1999 and 2000 than realized it was a dumb mistake.
Buy a kit at Wal-mART OR AUTO PARTS COMES WITH INSTRUCTIONS
You can use up to 21oz of R-134a. But don't forget if you are needing to add R-134a you will also need to replace some of the oil also.
The 1998 Chevy did not come with Freon (R12) installed. Freon was banned beginning in 1996. It contains R-134. You have a leak that needs repairing before adding more refrigerant. It is illegal to add refrigerant to a system with a leak. Seek out professional help to repair the leak.The 1998 Chevy did not come with Freon (R12) installed. Freon was banned beginning in 1996. It contains R-134. You have a leak that needs repairing before adding more refrigerant. It is illegal to add refrigerant to a system with a leak. Seek out professional help to repair the leak.