2018 Chevy Silverado Ac Low Pressure Port Location So i dug out my old a c adapter for 134a. i found the low pressure port line (large tube) near the firewall on the drivers side. removed the cap and the a c adapter for 143a doesn't fit. the fitting is slightly larger. doing some internet search seems the r 1234yf freon has a slightly larger port connection. Drive your car around with the a c on to get it warmed up (both engine and a c system). pull in to your driveway and leave your car running. put the a c on max cold and fresh air. now hook up your pressure gauge to the low pressure port. oh and this should all be done when its at least 80f. this should give you accurate readings.
A C Recharge Chevrolet Forum Chevy Enthusiasts Forums A c low port charging. my daughter's vehicle's a c isn't working. i bought an stp 134a recharging kit, cost $50. it appears that the refrigerant wasn't the problem and i already sent in the rebate for the a c recharge kit so i can't return it. i decided to try and top off the refrigerant on my 2019 sorento ex (even though it works great). 1 post · joined 2019. #5 · feb 27, 2019. your car is r 1234yf not r 134. if the low side port seems just a little too big, it probably means you have r 1234yf freon. you can verify by looking at the tag under your hood that specifies your freon type. for me, the tag was on the bottom front of my hood (2014 dodge charger). Posts: 1,821. hi loligag; the dash a c lines should be in the upper left above the generator. if they are still there, there should be covers on the charge ports. red cover for the high pressure side and a blue or green cover for the low pressure or suction side. 28 posts · joined 2009. #1 · jun 10, 2010. having trouble (and this should be very simple) recharging the a c system. the difficult lies in locating the low pressure port. my a c recharge gauge and line only fits on what i believe to be the high pressure side, which absolutely makes no sense as the refrigerant is only supposed to go in on the.
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