Question about 2004 Buick Rainier

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I want to recharge the a/c of my 2004 Rainier, but do not know where the low pressure port is and the caps are not marked with L or H. Help! Thank you.

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The good news is a that vehicle has R134A which means the quick release from your refill can will only fit the low pressure side which is normally a little higher than the High. Unlike the old R22 systems the Low and High pressure connections are slightly different in size.

Posted on Apr 03, 2011

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Low side is the line running from the compressor to the condenser.

Posted on Apr 03, 2011

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Low pressure port is smaller then hi pressure port
also low pressure port is on line feeding compressor(suction)hi would be on other line (pressure)

Posted on Apr 03, 2011

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