Rear A/C line issue - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 08-04-2010, 06:44 PM
superfrog66 superfrog66 is offline
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2006 GMC Envoy SLT XL
Light Pewter Metallic 4.2L I6 4X4
Join Date: Mar 2008
Location: Nova Scotia, Canada
Posts: 10
Rear A/C line issue

Hi every one. I just spent 240$ at a garage to finally tell me that the rear line is leaking. It is leaking at halfway. I saw the dye. Now, my options are:
1- replace the line
2- cap off the line and only have front A/C. According to a shop, they do that all the time as the rear A/C always have these issues as the lines are not very well protected.

Now, here's what I want to do. I am going to get the rear A/C line capped off as I do not live in the South and the rear can do without A/C. The shop is charging $400 to simply cap 2 lines. It seems really overpriced. I want to remove the lines myself, and get them capped off at a proper shop. It will save me at least $200.

Is there someone who has done the capping off of the rear A/C line and also have pictures and any kinds of a DIY list. A diagram of the full 2006 Envoy XL A/C set-up would also be awesome.

I know this is not the best solution, but I am getting rid of the vehicle in September and I dont want to sink a $1000 in repairs. As long as I have front A/C, I will be happy and most importantly, the wife will be happy.
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  #2  
Old 08-04-2010, 06:52 PM
OldSVTGuy OldSVTGuy is offline
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2004 Chevy TrailBlazer LT
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Before you can BEGIN to cap the lines, the entire system must be properly discharged. Then, you can "cap" the lines. After that, and to ensure there is no leakage, you have to pull vacuum on the system for at least an hour. Then, and only then, can the system be recharged. So, you see it is not simply a matter of capping the lines and being good to go.

I agree that $400 sounds a bit steep. Maybe get another estimate from a shop with A/C experience.

Good luck.
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  #3  
Old 08-04-2010, 06:59 PM
superfrog66 superfrog66 is offline
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2006 GMC Envoy SLT XL
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Agree with you. I have someone already that will do that for cheap. I am at the stage to either replace the line or cap it off. Thx for the advice though. I still like to see pictures or a diagram.
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  #4  
Old 08-04-2010, 07:03 PM
Copper93 Copper93 is offline
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2008 Chevy TrailBlazer LT
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My dad's envoy had the same problem. We ended up cutting the lines and by passing them. We uses copper lines and flared fittings. My brother works on residential A/Cs and had all the parts. Its been working for several months now.
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  #5  
Old 08-04-2010, 07:08 PM
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RayVoy RayVoy is offline
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2009 Chevy Avalanche LTZ
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I had the same problem with my extended truck.

Take it to a good ac shop and have them use a repair kit.

My complete repair, including finding the leak, was less than your $240.
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  #6  
Old 08-04-2010, 09:11 PM
superfrog66 superfrog66 is offline
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2006 GMC Envoy SLT XL
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Thx Rayvoy. Here in Halifax so far, I have not had much luck to find a good A/C shop that I seemed to trust. For example, I went to another shop today and told them that I wanted a quote on capping the line. In the end, they charged 1/2 hour of labour for telling me what I already knew. I was livid, but what could I do. They had my truck and I had to pay them. I am a little ticked off at the whole A/C thing. In the end, it will cost over $600 to have a freaking line capped off. What a joke.

Thx. and I will keep calling shops to see if someone can do something for me.
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  #7  
Old 08-04-2010, 11:01 PM
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Topher Topher is offline
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2002 GMC Envoy SLT
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Why pay to have an estimate? There was no reason for them to charge you 1/2 hour labor. Or did you have them rediagnose it?

Frankly, you should fix the rear A/C if you're going to sell it. It's not really fair to cover that up and sell it.

Is it leaking at a joint where there is a fitting, or just in the middle of a line?
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  #8  
Old 06-01-2011, 12:09 PM
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Big Jim 2003 Big Jim 2003 is offline
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2003 Chevy TrailBlazer LT EXT
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rear AC leak

I am in the same boat.Dealer did a check on system and found major leak on right side high pressure line.Cost me 114$ to confirm my suspicions, ouch.The worst part was that they did not want to tackle fixing it and instead referred me to a local AC shop,thanks alot.I was hoping too that someone had instructions and pictures of how to cap the rear AC.Would be a good STICKY.
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  #9  
Old 06-06-2011, 11:38 AM
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Big Jim 2003 Big Jim 2003 is offline
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2003 Chevy TrailBlazer LT EXT
Dark Gray Metallic 4.2L I6 4X4
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Rear AC capped

Here is an update to my AC problem.The rear high pressure line had corroded and was leaking.To fix this I had to choose between repair of the rear line($440),or capping off rear system($280).I had the rear lines capped because if the line is corroded and not being replaced I was afraid that I would be dealing with another leak in the future.All the lines are still there and can be reconnected if so desired.
The lines that were capped are under the hood.One is on the drivers side of the engine,it is 3/4 inch in size and splits to run down beside the PCM and towards the back.The other is hidden between the coolant overflow tank and the passenger side fender,it is 3/8 in size.The caps that were used may have been crimped on,I am not sure,but I did not see any sign of solder,braze or welding and did not think to ask,sorry.
Everything is COOL now.I only think I used the rear air maybe three times in the 8 years I have owned this truck,so I dont think I will miss it.FYI dealer wanted $1200 to replace the rear line and did not want to cap or repair it.
With the hot weather upon us,(hit 80 here yesterday) it will be great to be again.
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  #10  
Old 06-06-2011, 01:16 PM
pepito pepito is offline
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2005 GMC Envoy SLE XL
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Guys,

I got the rear lines capped last week. The shop charged me 210$ to cap the lines and another 140$ for the a/c gas fillup. Apparently the lines only are 600$ plus the time to replace them plus plus plus. So I decided to go with the cheapest solution.

If this info can help
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