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Thread: 2007 Suburban - AC leak
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04-08-2014, 05:21 PM #1
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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04-08-2014, 06:46 PM #2
- Join Date
- Apr 2008
- Location
- Madison, WI
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- 7,006
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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04-09-2014, 02:24 AM #3
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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04-09-2014, 03:23 PM #4
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
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.
-------------------------------------Kooks 1 7/8" race headers, Kooks ORY, Borla catback, Nitto 555R, LS6 intake manifold, Shaner S3 ported stock throttle body, SLP lid, smooth bellows, JAAM Ram Air kit, Elite Engineering catch can, LS6 valley cover, EGR and AIR deleted, Frost tune, and Simpson Racing child car seat in the back. 13.2 @ 108MPH
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04-09-2014, 05:16 PM #5
Guess it'll depend on what we find. Thanks!
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04-11-2014, 03:02 AM #6
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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04-11-2014, 03:46 AM #7
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
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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04-11-2014, 04:21 AM #8
That is my hope. I have to order new shocks for the back and will take care of it then.
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