Question about 1999 Chevrolet Suburban

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How and where do you add 134a to air conditioning on 1999 suburban small port or the large port?

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Small port is the suction side of the system. Make sure you have a gauge to monitor system low side pressure. Ambient temperature makes all the difference as to what pressure it should be when full. Probably between 25 and 40 psi.

Posted on Aug 05, 2010

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