Few Questions on replacing AC

[DuckHunter]

I just ordered a new ac compressor and acclumulator aswell as cabin air filters. THis will be my first time repalcing them. Compressor went out about 2 weeks ago. I found videos on youtube of how to replace both doesnt look to hard but my eyes could be deceiving me. Is there anything i need to know or need before the job i already have a can of freon. Once i replace both i just add freon and its good to go? Any other steps i need to know? Anything to look for or be aware of ahead of time. Any help would be greatly appreciated thanks in advance

 

[Wake]

Look for some articles on the internet for guidance on doing it right.

You'll need oil for the compressor most likely. You'll also probably should add an inline filter if your compressor seized and you may have metal particles floating around your system. You don't want to damage the new compressor.

You'll also need a vacuum pump to get it done right. You need to remove the air you'll introduce in the system breaking it open and replace it with the freon. I'm not sure on our trucks but there should be a sticker on the AC/heater box on the firewall that gives the capacity of the system. On cars it used to be about 2.25lbs/cans for an empty system. I imagine it's more on these trucks, especially if you have rear A/C.

 

[Trixxterr]

If your goin through the trouble may as well be throught and get the whole kit and replace all of it. Well MOST OF IT ANY WAY. Your goin to need new O-rings, Orifice tubes(in line filters), Compressor, Accumulatetor, some kits come w liquid lines some do not. You WILL need oil for the system, PAG OIL, 48, 49, 50, 100, etc. Each compressor is different. Plus the refrigerant, R134A, is what its is. And you WILL need more than one can I can promise you..

A/C kit for the 02 Yukon in your Sig. Would run about $250-300. @ the auto parts store I work at. Not including the (freon)..

 

[southboundchicken]

definitely gonna need a vacum pump . my thoughts are that when its all said and done your gonna look back and realize it would have been cheaper to pay a qualified shop to do it for you.

 

[Trixxterr]

definitely gonna need a vacum pump . my thoughts are that when its all said and done your gonna look back and realize it would have been cheaper to pay a qualified shop to do it for you.

QFT..Yup,Yup.

 

[nhoj_yelbom]

if you must DIY, go and let a shop vacuum and charge the system. i would recommend a air ratchet to remove compressor, easy job.

 

[muncie21]

I just replaced a seized compressor on my '03 burb, pretty easy stuff, just need to pay attention to details.

Minimum required parts:

• Compressor
• orifice tube/expansion valve (rear A/C)
• filter drier
• O-rings/seals

General Instructions (many more detailed ones available on Youtube/internet)

• Discharge (properly , I didn't...R134 is supposed to be hella better on the environment than R12..right?? ) existing refrigerant
• Replace orifice tube
• Replace drier
• Remove top radiator shroud
• Remove main serpentine belt
• Remove AC belt
• Remove inlet/outlet AC lines from compressor
• Remove compressor (4 bolts)
• Measure oil from old compressor and replace the same amount in the new. If the old is empty, don't put the new in empty 2oz (more or less) is what's recommended
• Flush system
• Reconnect everything you removed
• Evacuate with vacuum pump to remove moisture
• Perform vacuum hold test, to ensure system is integral
• Recharge
• Enjoy!