Should be on one of the lines on the receiver/dryer at the R.R. corner of the engine compartment. I may be covered by a plastic shield that runs across the top edge of the firewall and also covers the wiper motor.PopaTim said:Just got a 95 Sable 3.0 Automatic. Ac doesn't work and figure I'd test the pressure but I can't find the low side valve. Someone point me in the right area please.