Can find high side but not low side 4.6 L engine
where is the low side port on 1999 seville sts?
on 1999 Cadillac Seville STS
Should be on the same line with the orifice tube installed at the union between them. The fitting before the orifice tube closest in line to compressor is the high side and the one after the orifice tube closest to the evaporator is the low side.