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  1. #1

    Default Air conditioning out in Yukon XL

    Hi, yesterday the AC stopped blowing cold. Fan works, compressor seems to kick on and the engine changes idle as a result, but only ambient air comes through. What to I check?

    63k miles, 2003 Yukon XL 2500 4x4.
    Last edited by stubble; 08-16-2010 at 11:10 AM.

  2. #2
    Sr. Engineer
    Join Date
    Aug 2009
    Location
    Virginia Beach, VA.
    Posts
    337

    Default

    Will it blow cold if you are moving and only warm when sitting still??

    I would get guages and check pressure....quick and easy first check.
    Maybe also go through your fueses and make sure you have not blown a fuse.

  3. #3

    Default

    first is to check pressures

    more than likely got a leak and lost the refrigerant.

    with ac running check your ac lines. cold side should be cold, hot side hot. check for frosted places wich would indicate a restriction
    GM TECH

    05 silverado shortbed

  4. #4

    Default Thanks for your replies guys

    This morning I found the A/C belt on the ground. It had broken. DOH! Well there's your problem! Pullies seem ok, so I'm just going to replace it.

    Appreciate the replies.
    Sebastian
    2003 Yukon XL 2500 4wd

  5. #5
    Sr. Engineer
    Join Date
    Aug 2009
    Location
    Virginia Beach, VA.
    Posts
    337

    Default

    LOL
    Yep, I would agree I would check the belt first. :D

    Good Luck with him.

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