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Q:

How do I recharge the air conditioning system on 2008 Saturn Sky Red Line

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Need the location of high port tube
(1) Answer
In my experience you always charge on the low side port if you're just 'topping off'. Having said that, cars these days are very very pressure dependent. Some vehicles take as little as 1lb of R134a for a full charge. If you overcharge the system, you can blow out the seal in the front of your compressor or cause over a thousand dollars in damage. I would highly recommend taking it somewhere and having them recharge it for you, they can check for leaks and assure you that your system has a proper charge for less than $100.00.