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Air conditioning 99 GMC

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Topic: Air conditioning 99 GMC

Posted By: Tracy Martin TN
Subject: Air conditioning 99 GMC
Date Posted: 07 Oct 2019 at 8:28pm

My compressor has bit the dust. About 6 months old. How much oil would be needed in system if I replace the compressor, dryer and orifice tube? This compressor made a noise from startup. O'reillys parts. Thanks Tracy

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No greater gift than healthy grandkids!

Replies:

Posted By: steve(ill)
Date Posted: 07 Oct 2019 at 8:54pm

http://www.techchoiceparts.com/refrigerant-and-oil-capacities/gmc-light-truck" rel="nofollow - http://www.techchoiceparts.com/refrigerant-and-oil-capacities/gmc-light-truck

Additionally, General Motors issues Bulletin # 02-01-39-004B replacing PAG 150 oil with a lower viscocity oil. Thus, TechChoice now indicates PAG 46 (P46D) oil for those vehicles.

Year	Model	Refrigerant		Oil
Year	Model	Type	Ounces	Type	Ounces
	ENVOY
2002-2004	All Engines w/ Front & Rear AC ...	http://www.techchoiceparts.com/inventory/116589" rel="nofollow -		FULLSIZE PICKUP
2003-2004	All Engines - w/ Denso Compressor ...	http://www.techchoiceparts.com/inventory/116589" rel="nofollow -

Posted By: steve(ill)
Date Posted: 07 Oct 2019 at 9:00pm

when you install the compressor and any other parts.... you will then pull a complete VACUUM.... so you are starting from scratch... ZERO... don't matter how many parts you replace, you add the same quantity afterwards.

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Like them all, but love the "B"s.

Posted By: Tracy Martin TN
Date Posted: 07 Oct 2019 at 10:36pm

Steve, I wondered if the condenser and evaporator would trap any oil. I don't want to overfill oil amount. Thanks Tracy

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No greater gift than healthy grandkids!

Posted By: Dave H
Date Posted: 08 Oct 2019 at 10:48am

Tracy, maybe try asking google. As I foggily recall, pulling a vac will eliminate all moisture (water vapor).

I never recall my vac puking any oil out that was extracted from the system.

Just got back from google. It seems that all fingers point to the info that came with the new compressor. Says some come with the correct amount of oil already added to the compressor.

Posted By: steve(ill)
Date Posted: 08 Oct 2019 at 12:55pm

I guess if I removed the compressor and opened the hoses, I would be tempted to BLOW compressed air thru the system to make sure it was purged of any oil / crap ... Then pulling the vacuum should get rid of any moisture.

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Like them all, but love the "B"s.

Posted By: LouSWPA
Date Posted: 08 Oct 2019 at 6:34pm

actually, to do the job correctly, you should flush the system with an AC flush product before reassembly. Do that one time, and when you see the junk that comes out of that system and you will never do an AC job without flushing again. And, because you cannot properly flush the evaporator, many replace it also

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Wait for the Lord;
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