GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 5 of 5
  1. #1

    Default a thought my freon was low, but....

    the a/c is not really cold, I htought I was low on freon so I bought a kit to recharge it but when I checked I have almost 50 PSI in the low pressure when the a/c is in full blow.
    I don't have any reference for that truck.
    do somebody know what the psi should be ? what would be the problem(S).

  2. #2

    Default

    You need the right tools and documentation to work on A/C.

    That would be a set of gauges so you can read the low and high pressures.

    Then a GM Factory Service Manual set will have pressure tables in it for what the pressures should be (low and high). The pressures vary depending on the ambient air temperature and humidity. Thus the reason for the chart.

    You can order a GM Factory Service Manual set from helminc.com or a GM dealer.
    92 GMC Sierra 2500

  3. #3

    Default

    what i recommend is bring it in to a reputable AC shop,

    2003 Z71 Silverado LS
    Access roll up cover
    Bed Rails
    Billet Grill insert
    Bed Rug
    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  4. #4

    Default

    Just had the same issue with my 1994 Silverado Ext 4WD.

    Turns out that the Low side pressure was the same as the high side.

    This could be a problem with the valve on the Condenser.

    In my case I had to replace the Condenser, A/C compressor, and the Dryer.

    Once the system pressure is the same on both the high and low side, the Compresser usually gets fried.

    Best bet is to take it to a good A/C shop.

    It is Kool to be cool...
    Pavement sucks... :grrrrrr:



    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs
    350cu.in bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

  5. #5

    Default

    Quote Originally Posted by ejohnson03 View Post
    Just had the same issue with my 1994 Silverado Ext 4WD.

    Turns out that the Low side pressure was the same as the high side.

    This could be a problem with the valve on the Condenser.

    In my case I had to replace the Condenser, A/C compressor, and the Dryer.

    Once the system pressure is the same on both the high and low side, the Compresser usually gets fried.

    Best bet is to take it to a good A/C shop.

    It is Kool to be cool...
    I'll bring it to a shop, but if I need to replace the same stuff as you, i'm going to wait, I just spent a ton of money between the tahoe and the jeep with thing that broke...

Similar Threads

  1. Who has added their own freon to their a/c system?
    By Springthing in forum General Chevy & GM Tech Questions
    Replies: 5
    Last: 07-28-2010, 10:13 AM
  2. Chevy Express add freon
    By ftalovaa in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 06-22-2009, 01:22 PM
  3. thought this was cool
    By 5speedsilverado in forum Chevy Truck Accessories
    Replies: 13
    Last: 06-07-2009, 01:11 AM
  4. AC controller shorting when adding freon
    By drdelsol in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 06-13-2008, 02:24 PM
  5. Overall thought and your help please
    By nathaniel126 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 5
    Last: 01-30-2006, 12:25 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •