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2007 Suburban - AC leak

This is a discussion on 2007 Suburban - AC leak within the GM Trucks forums, part of the Vehicle Specific category; Last fall, I noticed that the AC wasn't blowing as cold in our Suburban. I recharged it and it lasted ...

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    2007 Suburban - AC leak

    Last fall, I noticed that the AC wasn't blowing as cold in our Suburban. I recharged it and it lasted another week or so before quitting completely due to low pressure. The truck is equipped with the rear heat/AC unit. I am going to make an appointment to have it dye tested before the weather turns hot. Any known issues with refrigerent leaks or areas I should pay particular attention to?

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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I honestly can't think of a known issue on this body style. The older body style had rear AC line leaks and its probably still a good possibility for your Suburban. AC compressor is always a possibility also. I just can't remember doing hardly any AC repairs on these 07+ GM SUVs

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    Good to hear. I did a visual inspection of the rear lines and the only issue I found was a split fitting on a coolant line for the rear heat (no leak). The AC lines all looked fine, but we will definitely be watching them for the dye test. If it turns out to be the rear lines or unit, I presume there is no harm in capping them off and just utilizing the front unit?

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    Moderator Cutlass's Avatar
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    We've done that before. You just have lower the amount of refrigerant you charge the system with. But sometimes sectioning in a repair pipe isn't too big of a deal and might be worth it.
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    Guess it'll depend on what we find. Thanks!

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    On the coolant line for the rear heat the metal collar on the end of the rubber hose is split. It is right where the rubber line attaches to the heater under the floor. The hose isn't leaking and it looks like it would be a complete M.F. to try and change it out. I am thinking about blowing the road grime out of the split and installing a hose clamp around the fitting. Thoughts on this less than perfect repair?

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    I think that would be ok. If I'm picturing it correctly, it'll kinda hold that crimped collar on there tight.

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    That is my hope. I have to order new shocks for the back and will take care of it then.

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