steelers7girl Posted August 24, 2012 Report Share Posted August 24, 2012 I have a question. I have a 2003 SS Silverado & the tag under my hood is unreadable. I am replacing the accumulator, orifice tube & return line & I need to know how much gas & oil to add. The parts store couldn't tell me. Thanks. Quote Link to comment Share on other sites More sharing options...
kissfans03ss Posted August 25, 2012 Report Share Posted August 25, 2012 Honestly I would take it to a shop because once you open the system you introduce moisture and that is what kills compressors etc. The second reason is you will know if the system has a leak after you perform your repair but any service manual should have the info. Sent from my DROID BIONIC using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
lgowen343 Posted August 25, 2012 Report Share Posted August 25, 2012 Contact the GMPARTSDIRECT on this forum. They can tell you. As long as its not humid and it isn't open for anylonger than a hour or two you should be ok. Make sure to blow out any debris before installing new parts. Quote Link to comment Share on other sites More sharing options...
Blazerdave2000 Posted August 26, 2012 Report Share Posted August 26, 2012 I would only do this if u have a vacuume pump to pull all the moister out of the system. Otherwise your going to have all that air in there causing it to run high head pressure and have non condensables in the system. Pull a good vacuume and it's 134a and your pressures should be about 35 to 40 psi suction pressure at 1700 rpm. Quote Link to comment Share on other sites More sharing options...
steelers7girl Posted September 3, 2012 Author Report Share Posted September 3, 2012 Thanks for your responses. After being told by the auto parts store & a dealer that I had to replace the HP line which is a dealer item only, I found out from a local dealer that the schrader valve can be removed & replaced. The mechanic took the valve out for me because it doesn't come apart where you would think it would & was honest enough to say "go to Auto Zone" across the street to get a new schrader valve....they are a lot cheaper & have it in stock. My a/c is now blowing 60 degree air at an idle & 50 degree air riding down the road. That is pulling in outside air, on recirculate cycle....it's colder. Quote Link to comment Share on other sites More sharing options...
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