Question about 1993 GMC Suburban

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Not cooling What type of freon is in a 1993 suburban my sisters is kicking in and out and not cooling I know it more and likely need freon.

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I have a 93 sub and it takes the old style freon which you cant buy anymore unless your an ac repairman,you can buy a conversion kit but would have to be sucked out tottally of all the old freon and the refilled w/ the r134a freon

Posted on Jun 19, 2009

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Your system needs to be cleaned out and converted to r134 or you can try a r12 substitute

Posted on Jun 19, 2009

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Refill freon on a chevy suburban 2500 4x4 2001 i dont know how much to put on it


if it is cooling just alittle bit ,try one can if you can get any gauges to hook up to it, if its not cooloing at all ,get one big can at auto zone , tall can with oil and stop leak in it with freon in it, try the big can ,will work for you ,hope to help you, if it gets over filled ,the system will not circulated ,not cool, really need to hook gauges to it, thanks robert b.

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Do you have a sticker on the inside of your hood of your car? It should list the type of freon you need, if not if you have the owners manual it will give you that information also........the only thing i am obligated to ask you by law, is are you licensed to recharge the cooling system in your car? If not it is a violation of federal law for you to recharge your cooling system. You must be trained properly to do so........if you are not then you have to have it done at a garage who is licensed to do so..........

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3 Answers

What type of freon is in a 1994 GMC Suburban


There should be a lable underhood.but probably had R-12,Best to go ahead and convert to R134A.Recommend replace reciever drier ,buy conversion fittings from parts house for 134A,remove compressor turn upside down and rotate clutch by hand to get as much oil out as you can,then pour in aprox 4 oz pag oil.Reinstall,change orfice tube the will need aprox 12 oz R134A to replace 16oz R-12.Buy R134A at walmart cheaper than all parts houses by at least $2.00 a can.Cgarge till low side preasure at aprox 40 to 45 psi and gigh side 200 to 250 psi.Should cool fine.

Jun 19, 2009 | 1993 Chevrolet Suburban

1 Answer

The AC is not cooling and when I check the clutch on the compressor it isn't engaging and turning the compressor.


You must of lost freon and when there is no freon your clutch will not activate.Must check it for pressure in the lines.If there is pressure check pressure switch.Good luck let me know

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1 Answer

Front aircond. blows warm. Rear air is cold


this is caused by a defective temperature control blend door actuator motor. Don't overhcahrge the system, if one part of dual climate works ok the problem is not the compressor or the system charge

May 12, 2009 | 1993 Chevrolet Suburban

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