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Old 06-24-2013, 07:36 PM   #1
burton'sblazer
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A/C woes for 2004 silverado

Any A/C buffs around? My compressor locked up on my '04. What would be the way to fix? Pull compressor and flush system?
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Old 06-24-2013, 08:15 PM   #2
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Re: A/C woes for 2004 silverado

Pull conpressor flush system replace the receiver drier anf offrice tube. Dobyour self a favor and buy a new compressor from napa i installed a reman from advance auto for a customer cause thats what ahe wanted it disnt last 2 hours before the clutch fried off
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Old 06-24-2013, 08:21 PM   #3
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Re: A/C woes for 2004 silverado

ok, that's what I figured. What would you use to flush the system out with?
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Old 07-04-2013, 11:37 PM   #4
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Re: A/C woes for 2004 silverado

There should be flush kits available, I used one where I had to pour into a separate bottle and pressurized with shop air... flush through, add oil to accumulator if needed, install orifice tube. Make sure to drain oil from compressor and charge with correct amount and type of oil. If possible replace any O-rings at the block fittings to help prevent leaks. Pull vacuum and charge if no vacuum leak is found.
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Old 07-05-2013, 12:13 PM   #5
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Re: A/C woes for 2004 silverado

NAPA will be twice the price of other Auto parts stores. You can get a brand new Delphi compressor with clutch from Autozone for $340. Same compressor is over $600 at NAPA.
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Old 07-05-2013, 01:27 PM   #6
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Re: A/C woes for 2004 silverado

i used the napa cold power kitys never had any problems with there aftermarket compressors, if you want to go back with dephi be prepared to spend some money
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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

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Old 07-08-2013, 10:53 PM   #7
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Re: A/C woes for 2004 silverado

If this thread is otherwise done, I have a related question. I have a brand new compressor, accumulator, and orifice tube, and today I charged my system to 60 psi when the ambient temp was about 100*F. It blows ice cold, but the problem is that it still cycles off frequently when I'm driving. I can constantly feel it going from cold to warm about every 30-45 seconds. At idle, it stays on and blows cold. What the hell do I need to do?
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Old 07-08-2013, 11:24 PM   #8
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Re: A/C woes for 2004 silverado

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If this thread is otherwise done, I have a related question. I have a brand new compressor, accumulator, and orifice tube, and today I charged my system to 60 psi when the ambient temp was about 100*F. It blows ice cold, but the problem is that it still cycles off frequently when I'm driving. I can constantly feel it going from cold to warm about every 30-45 seconds. At idle, it stays on and blows cold. What the hell do I need to do?
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Charged to 60 psi ? How much refrigerant did you charge into the system? Did you flush the system, pull a vacuum before recharging ?
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Old 07-08-2013, 11:55 PM   #9
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Re: A/C woes for 2004 silverado

60psi omg!!! Pressures should be around 35-45 on the low side and 175-250 on the high side. If you charged to 60 psi your more then likey hitting the high pressure out off on the high side
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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

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Old 07-08-2013, 11:57 PM   #10
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Re: A/C woes for 2004 silverado

Also its better to let a shop charge it with a machine they can add the proper ammoit of frenon that the manufactor recomends
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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

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Old 07-09-2013, 09:17 AM   #11
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Re: A/C woes for 2004 silverado

Rockauto.com carries both Delphi and delco compressors for around ~$200.
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Old 07-09-2013, 10:19 AM   #12
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Re: A/C woes for 2004 silverado

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60psi omg!!! Pressures should be around 35-45 on the low side and 175-250 on the high side. If you charged to 60 psi your more then likey hitting the high pressure out off on the high side
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Even with the ambient temp around 100*F? At 40 PSI my air was not very cold.
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Old 07-09-2013, 10:27 AM   #13
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Re: A/C woes for 2004 silverado

Okay, so my actually pressure 57 PSI and everything I can find says at anything over 90*F low side pressure should be 50-55 PSI. I'm pretty spot on. If I release refrigerent will it be more difficult for the compressor to pull it down?
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