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#4511625 - 09/09/17 03:14 PM 2002 Yukon AC slugging
another Todd Offline


Registered: 05/15/06
Posts: 2205
Loc: Lakeside CA
New to me 2002 Yukon 5.3L with rear air. Horrible noise upon acceleration with AC on. Tensioner is jumping up and down, and according to GM TSB #03-01-38-019A, it is caused by the compressor slugging. The compressor is very low on the engine and apparently liquid refrigerant and oil can pool in the compressor causing it to slug (hydraulic binding). I already replaced the belt and tensioner.

Is there any way to get it out of this condition without replacing the compressor like TSB says? What if I idle it for a long time, as it doesn't seem to do it at idle. Would that eventually pump the accumulated fluids out? Heat up the compressor?
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#4511642 - 09/09/17 03:42 PM Re: 2002 Yukon AC slugging [Re: another Todd]
Chris142 Offline


Registered: 06/05/03
Posts: 16819
Loc: Deplorable in apple valley, ca
No. The compressor is damaged internally and must be replaced. It will blow up and contaminate the whole system soon if you keep driving it. This is so common that I keep these parts in stock.
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#4511656 - 09/09/17 04:00 PM Re: 2002 Yukon AC slugging [Re: another Todd]
another Todd Offline


Registered: 05/15/06
Posts: 2205
Loc: Lakeside CA
So how do I prevent this in the future?
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#4511671 - 09/09/17 04:28 PM Re: 2002 Yukon AC slugging [Re: another Todd]
NHGUY Offline


Registered: 10/09/11
Posts: 5043
Loc: USA
Four Seasons/Comfort Temp sells a DeSlugger kit for Chrysler minivans and a few other vehicles.It pulses the coil for a few minutes when the AC is turned on,to prevent compressor explosions/case splitting.

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#4511674 - 09/09/17 04:34 PM Re: 2002 Yukon AC slugging [Re: another Todd]
Kibitoshin Offline


Registered: 04/19/16
Posts: 693
Loc: Kaiōshinkai
Four Seasons makes a deslugging module that plugs into the A/C clutch magnet that pulses the engagement to slowly push oil out of the compressor before it fully engages.

http://www.4s.com/en/marketing/psp-solutions/the-deslugger/

I have one installed in my 02 Silverado since the truck barely gets used and as a preventative action to prevent slugging if it ever happens. A/C components are all original w/ 150,000mi on it so I gonna make it last.


Edited by Kibitoshin (09/09/17 04:36 PM)
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#4511824 - 09/09/17 08:17 PM Re: 2002 Yukon AC slugging [Re: another Todd]
WyrTwister Offline


Registered: 01/13/13
Posts: 1516
Loc: Texas
The GM cars I have worked on in the last few years , were older cars .

They had an accumulator thwr received the refrigerant / oil from the evaporator coil . Best I remember , the outlet was up high enough that the compressor pulled vapor off the " top " .

Surplus oil / refrigerant was held in the accumulator in " reserve " .
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#4511965 - 09/09/17 11:43 PM Re: 2002 Yukon AC slugging [Re: another Todd]
Chris142 Offline


Registered: 06/05/03
Posts: 16819
Loc: Deplorable in apple valley, ca
Originally Posted By: another Todd
So how do I prevent this in the future?
move the compressor to the top smile...the oil and refrigerant settles in the compressor when its not running. When you turn the ac on it tries to compress the liquid and bang.
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#4512072 - 09/10/17 08:15 AM Re: 2002 Yukon AC slugging [Re: another Todd]
WyrTwister Offline


Registered: 01/13/13
Posts: 1516
Loc: Texas
Where is the accumulator located ? Higher or lower than the compressor ?

Best of luck , :-)
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Wyr
God bless

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#4512569 - 09/10/17 06:35 PM Re: 2002 Yukon AC slugging [Re: WyrTwister]
Chris142 Offline


Registered: 06/05/03
Posts: 16819
Loc: Deplorable in apple valley, ca
Originally Posted By: WyrTwister
Where is the accumulator located ? Higher or lower than the compressor ?

Best of luck , :-)
higher...much higher
_________________________
02 Wrangler durablend 10w40
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Z400 castrol T 10w40
Can am maveric edge 5w40
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#4512574 - 09/10/17 06:40 PM Re: 2002 Yukon AC slugging [Re: another Todd]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2604
Loc: Cedarbrae, Ontario
This is the first I have heard of this "slugging". My 2004 Silverado a/c never gave any problems. Any specific models this problem occurs in?
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#4512593 - 09/10/17 06:56 PM Re: 2002 Yukon AC slugging [Re: xxch4osxx]
Kibitoshin Offline


Registered: 04/19/16
Posts: 693
Loc: Kaiōshinkai
Originally Posted By: xxch4osxx
This is the first I have heard of this "slugging". My 2004 Silverado a/c never gave any problems. Any specific models this problem occurs in?


Mostly in Tahoes and Suburbans with rear A/C.
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Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L - 170k mi
02 Chevy Silverado C1500 V8 5.3L 154k mi

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#4512596 - 09/10/17 07:00 PM Re: 2002 Yukon AC slugging [Re: Kibitoshin]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2604
Loc: Cedarbrae, Ontario
Originally Posted By: Kibitoshin
Originally Posted By: xxch4osxx
This is the first I have heard of this "slugging". My 2004 Silverado a/c never gave any problems. Any specific models this problem occurs in?


Mostly in Tahoes and Suburbans with rear A/C.
Ah ok, that explains it then, thanks!
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2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)


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#4512606 - 09/10/17 07:10 PM Re: 2002 Yukon AC slugging [Re: Chris142]
WyrTwister Offline


Registered: 01/13/13
Posts: 1516
Loc: Texas
Originally Posted By: Chris142
Originally Posted By: WyrTwister
Where is the accumulator located ? Higher or lower than the compressor ?

Best of luck , :-)
higher...much higher





OK , best I remember the last Chevy Lumina sedan we had was a 3.1l V-6 , 1996 model . The A/C compressor was mounted down low on the engine .

Accumulator up high . Never had this problem , that I know of .

I am wondering if the truck in question is over charged with oil , or refrigerant of both ? Fan not blowing enough air and too much liquid refrigerant returning ? Something wrong with the expansion device & the evaporator coil being flooded ?
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#4512612 - 09/10/17 07:16 PM Re: 2002 Yukon AC slugging [Re: another Todd]
WyrTwister Offline


Registered: 01/13/13
Posts: 1516
Loc: Texas
Tahoes and Suburbans with rear A/C ?

Suspect a lot of piping and " devices " mounted really low . Wonder if one area is especially pow & acting as a " P-Trap " .
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God bless

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#4512690 - 09/10/17 09:13 PM Re: 2002 Yukon AC slugging [Re: xxch4osxx]
Chris142 Offline


Registered: 06/05/03
Posts: 16819
Loc: Deplorable in apple valley, ca
Originally Posted By: xxch4osxx
This is the first I have heard of this "slugging". My 2004 Silverado a/c never gave any problems. Any specific models this problem occurs in?
all 4.8,5.3 and 6.0 gm trucks with the bottom mounted compressor. The ones with rear ac are very prone to it.
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
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