Hello: There are two lines coming from the compressor. The larger line is the low pressure line and the servicing valve will be in that line or the accumulator (accumulator is a round cylinder with the large line connected on both sides. About 4 inches around and approximately 8 inches high. Just follow the line from the compressor till you find it. It should have a black plastic screw on cap. Put cap back on when done. Have engine running and A/C on when servicing.
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