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You are watching: Low pressure ac port chevy silverado

I have a 2002 Silverado v a 5.3L engine. The A/C is not working and also I desire to examine the press on both the low and also high side, yet can not find the short side port. There space 2 harbor (both a huge and little size) on the steel line to run from the evaporator come the condenser, however I can"t uncover a port between the compressor and the evaporator, which must be the low side. Please let me recognize where to low side port is.

I simply tried to recharge my A\C system, and Larry"s right- among the ports is high, one is low. If you buy a recharge have the right to from the auto parts store, the will only fit on the low side, which, if i remember right, is the biggest of the two fittings.

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If you"re going to include freon it"s best to perform this v the engine running, a/c on max and also blower ~ above high. If you have actually rear air, have that on complete blast, too. Include to the short side and monitor high side pressure. High next pressure must be 2.2 to 2.5 times the approximately temperature. If it"s 100 levels then the high next pressure need to be in between 220 and also 250 psi. Begin by targeting the lower finish of that, it"s less complicated to add than remove.When you stop including your low side have to be between 30 and 40 psi.
Thanks for the good advice.....all of the equipment I have faced in the past did not have the lo and also hi political parties on the same tube 12" apart.Here is the complete story. That is my mom"s truck and also a shop told her she needed an A/C compressor and also it would price $1000. I took a look at it and also the belt was missing, therefore they couldn"t understand the compressor was bad. The belt broke due to the fact that the idler pulley bearing seized up, a an extremely easy and also cheap fix. But the A/C tho didn"t occupational so I inspect the freon and it to be low so ns tried to include some, yet it wouldn"t take it it native the short side, which cause my concern of where the low side was. In the process of measuring the press on both the hi and also lo political parties I uncovered the hi side harbor was leaking for this reason I replaced that critical night and I need to acquire pump today to evacuate and recharge. I likewise have learned the it was not taking a fee from the short side because you have actually to brief out the low side press switch to obtain the compressor to absent in. It will certainly be 100F through high humidity because that the next 3 days so hope a recharge is all that is required!