AC Help with 96 GMC Suburban ??????????


Old 04-09-08, 04:03 PM
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Join Date: Mar 2008
Posts: 16
AC Help with 96 GMC Suburban ??????????

Hello and thanks for taking a look at this. I know from a mechanics assesment last year that I need a new compressor, tube and dryer. Is this something I need to leave to the pros or should a rookie like myself attempt this? If you think the rookie can do it, all the advice and procedures you can give will be greatly appreciated. Let's have a good day.
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Old 04-09-08, 05:36 PM
carguyinva's Avatar
Join Date: Nov 2003
Location: Shenandoah Valley
Posts: 1,147
the system needs to be flushed before any new parts are installed...the evacuated and recharged after parts installed. Unless you have the proper equipment and a good working knowledge of refrigeration systems, you probably ought to let a pro do it. refrigerant can be very dangerous if not handled properly...
Old 04-09-08, 09:47 PM
mlass's Avatar
Join Date: Feb 2008
Location: Euless, TX
Posts: 74
The recommended flushing procedure uses liquid R-134a refrigerant to perform the system flush and is the only GM approved method for system flushing. The use of alternate methods that utilize solvents has proven to be detrimental to A/C system performance and durability.

A/C system flushing should NOT be routinely performed when a system failure is encountered. System flushing takes a considerable amount of time to perform and is NOT necessary on most system failures.

Should be performed only when one of the following conditions is found:

A desiccant bag failure.

A gross overcharge of A/C system lubricant.

The A/C system lubricant is contaminated.

A catastrophic compressor failure causing oil contamination

A/C system flushing will remove some of the metal particles during a flush, but flushing is not completely effective in removing all metallic debris. System flushing should not be considered if removal of metallic debris is the only objective.

GM Service Operations continues to strongly recommend the use of a Liquid Line Filter and a Suction Screen to control this type of system contamination and avoid repeat failures.

Install a in-line filter 89016656 (*AC Delco Part# 15-10413) after you replace parts. Don't forget to check compressor oil of old and new compressor. Vacuum and Charge. You should be okay without a flushing.

Don't forget to replace orifice tube. It cought most of the debri (will let you how bad it was) and the in-line filter will get the rest.
Old 04-10-08, 06:10 PM
Join Date: Nov 2006
Location: Jersey
Posts: 526
No harm in replacing the compents yourself then take it to an A/C shop and have the system evacuated and charged.

After all this IS The DoitYourself Forum.
If everybody was an expert in every technology and certified on everything we wouldn't need this forum.

You will save some money but it's a good idea to get the shop manual from your library that describes YOUR system and how it works.
It's important to understand the theory and safety of A/C before you tackle this.

A/C parts are EXPENSIVE especially hoses.

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