Question about 1996 GMC Yukon

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Low side compressor nipple

I can not chharge the air condition with raedy made R 134 can and hose. when I attach it to the low side compressor nipple , I belive it wont reaches the needle to open it up

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I think you just need a better tool for the charging.

Posted on Mar 17, 2014


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Posted on Jan 02, 2017

  • 1959 Answers

SOURCE: 96 gmc jimmy a/c

50psi on the low side is a little high. Sounds like the system is overcharged by about 10-15psi. Overcharging a system will cause a lack of performance just as much as undercharging with one exception, overcharging can damage the compressor. The compressor will engage with as little as 20psi although there's no 1 benchmark for all engines, 40-45psi is considered a full charge. Hope this answers your question.

Posted on Jul 25, 2009

  • 509 Answers

SOURCE: 2003 yukon xl front a/c

{: ) Try to feel the the a/c accumulator for coldness. It is that metallic can mounted near the firewall, connected along the a/c suction pipe. Actually, 70 psi is still somewhat high. But anyway, if the accumulator is cold to touch, most probably the problem is on the front air distribution. Assuming that your front blower is working, the cold air could have been distributed elsewhere, to the other vents instead of the front vents.
It can be an actuator or an air vent door fault. There are also GM bulletins for this kind of concern like connector, wiring, or calibration issues. Depending on the retrieved codes by a scan tool, it can help narrow down the search and the cause, and eventually speed up the repairs. So goodluck.

Posted on Jun 20, 2011

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3 Answers

How to add refrigerant to air conditioning system

determine the type of refrigerant, conversion kits are available but not an easy job, most parts stores have refrigerant and connectors to add to your system, follow the directions on the can.

Jul 10, 2013 | 1997 Pontiac Sunfire

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My 2005 Chrysler Town & Country 3.8 Liter AC is not blowing cold air. I would like to try recharging with one of the R-134 kits. Is the low pressure port that I would need to attach the R-134 canister...

the hose fitting that you attach to the low side port will only fit that port-it cannot fit the high side (that port is too big) so you cannot do this wrong. The low (suction) side is between the compressor and the evaporator (passenger compartment, usually in the heater core plenium.)

Jul 05, 2011 | Chrysler Town & Country Cars & Trucks

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Where to self charge a/c unit?

Before attempting this make SURE your vehicle is running R-134 coolant. If it is running R-12, you will have to have this done by a professional. DO NOT attempt to mix R-12 and R-134 coolants, as this mix will become volatile and could possibly explode and cause massive system damage. You can find out what type you are running by looking for a ( usually yellow) decal on top of the A/C compressor or on top of the air accumulator ( the silver soda can looking thing.) Once you confirm you are running R-134, trace your A/C lines back from the compressor until you find two nipples, one large and one small. The large one is your "low side." This is where you will attach the recharge kit to service your system. The recharge kits are designed to only fit on the low side, so you won't have to worry much about confusing the two. Hope this helps you out. Have a good day!

Jun 07, 2011 | 2001 Ford Escort ZX2

1 Answer

Where is low side of a/c system to cahrge with 134

The low pressure side of the r134a system is always located on the thicker pipes vs. the thinner pipes leading away from the compressor.

So, just followi the larger diameter piping from the compressor until you come to a quick connect fitting that attaches to the hose quick connector that is attached to a can of r134a.

The pressure reading should be 25 psi to 45 psi on the low side when the compressor is turning and the a/c is on.

If it's higher than this, the compressor may not be turning, and the normal non turning psi is 75psi to 100 psi or so on a hot day.

Aug 26, 2010 | 1999 Jeep Grand Cherokee

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Where do i refill freon for AC?

On the fat hose coming from the air condition evaporator

Jun 11, 2010 | 2001 Pontiac Grand Am SE

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Locating low side air conditioning port

The low side will be located on the accumulator. The red arrow in the picture is pointing to low side. Good Luck.


May 29, 2010 | 2000 Ford Expedition

1 Answer

Need to know if my 1993 ford club wagon is r-12 or r-134 is there any way to tell from fill ports? the r-134 CANISTERS FIT ON THE LOWSIDE, ARE THE R-12's a different size?

If it is a quick connect fitting, it is R-134a
The low(charge) side fitting is: 13mm
The high side fitting is: 16mm

If it is a threaded fitting with threads on the outside, then it is the older R-12 refrigerant and can only be serviced by a licensed air conditioning service.

The low(charge) side is 7/16" threads
The high side is 3/8" threads

When servicing your air conditioner it is best if you have gauges, but it can be done without, just be careful.

Assuming the air works, but just not putting out that much cool air, then 1 or 2 cans of refrigerant won't hurt.

If there is no pressure/refrigerant in the system at all then it is usually a sign of a leak and should be taken to a pro because you may need to replace the receiver/dryer and have the leak fixed. The system needs to be evacuated for maximum efficiency if there was a leak or if hte system has been opened.

Adding too much refrigerant can be catastrophic as the high side pressures can reach 200-300psi on a hot day. So if you happen to have a low side gauge, and it reads somewhere between 35-45 with the Ac operating, you are golden.(tire gauge won't work)

Don't be surprised if the compressor doesn't kick on right away. Some vehicles are equipped with a pressure switch to keep from damaging the compressor if it runs low. Usually after adding one can, it is enough to engage the compressor.

Hope this helps.


Aug 21, 2009 | 1993 Ford Econoline

3 Answers

Where do I get instructions on how to recharge the air conditioning on my '96 Isuzu trooper?

if you have a 134 hose the fitting on the hose fits on only one fit look under the hood and you can find two fitting with a blue or green cap remove the smallest cap and connect the hose with a can of freon 134 with the engine on and the AC on try one can then check if the AC is blowing cold if not put in one more can

Jul 24, 2009 | 1999 Isuzu Trooper

2 Answers

1997 Deville ac compressor locked out - low

70 psi static does need a charge.find compressor relay, jump relay and compressor will start. add refrigerant,replace relay and a/c should work fine

Apr 16, 2009 | 1997 Cadillac Eldorado

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