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08-21-2011, 07:30 PM
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#1 |
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Registered User
Join Date: Sep 2003
Location: New Salem, ND
Posts: 1,558
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2005 trailblazer a/c?
I have a 2005 trailblazer and the a/c doesn't work at an idle. I checked the pressures and the low side was 45psi and the high side was 175psi. I thought maybe the compressor was bad so I bought a reman and put it on today. I did a half hour vacuum and then tried to charge it. It wouldn't really suck the freon in very well. I got 2lbs in it (takes 2.8lbs) and the compressor started locking up? The pressures were 45psi and 200psi. The low side still won't come down. I am at a loss now and hoping someone else has some advice. I don't want to pay the dealership to fix this but I might have to.
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07 Chevy classic LBZ Duramax (a few mods) '67 Chevy 1/2 ton 2wd (in pieces) '69 Chevy 1/2 ton 2wd (on hold) '71 GMC 3/4 ton 4x4 ‘71 GMC 1/2 ton 2wd suburban |
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08-22-2011, 01:10 AM
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#2 |
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Registered User
Join Date: Sep 2003
Location: New Salem, ND
Posts: 1,558
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Re: 2005 trailblazer a/c?
I might have found an answer. After searching the web I found out that gm has a service letter out for 2005 and older TB's. Apparently at idle the engine fan doesn't engage enough to cool the condenser causing the a/c to not work. I feel like a dip $*#! for not thinking about the fan causing this problem in the first place since it all makes sense now. Oh well live and learn I guess. Hope this helps someone else.
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07 Chevy classic LBZ Duramax (a few mods) '67 Chevy 1/2 ton 2wd (in pieces) '69 Chevy 1/2 ton 2wd (on hold) '71 GMC 3/4 ton 4x4 ‘71 GMC 1/2 ton 2wd suburban |
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08-22-2011, 08:32 AM
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#3 |
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Registered User
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
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Re: 2005 trailblazer a/c?
Thanks! I really haven't had a problem with the '03, but now I'll keep this in mind.
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'86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold  )I'm kinda like duct tape- no real purpose, but handy to have around. |
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08-22-2011, 08:48 AM
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#4 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,238
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Re: 2005 trailblazer a/c?
had that problem yesterday int he shop on a benz ml320 low side was 75psi and high side was pegging 520psi it was in a wreck and the fuse for the fan had blown installed a new fuse and evacuated and recharege the ac was good as new
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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