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When to replace AC compressor in GMC Sierra?

When to replace AC compressor in GMC Sierra?

Ok I have a 2002 Gmc sierra 2500 HD crew cab. Been having some issues with my a/c lately and finally came to the conclusion that I am going to swap out my ac compressor with a new one. My father in law owns a body shop so i have access to a pumping system to remove all the freon in the truck and replace it all when I’m finished.

What causes a GMC Truck compressor to lock up?

It refers to “liquid slugging” in the compressor which causes the compressor to lock up and put extreme stress on the belt and tensioner, which will usually pop the belt or break the tensioner or both.

Where is the TX valve on a GMC compressor?

Generally when you say filter/dryer, that’s on a Thermal Expansion Valve system and is located between the compressor and the evaporator on the high pressure side of the system. On all GM’s as far as i know they don’t use a TX valve and “filter/dryer”.

Do you have to add oil to new AC compressor?

And you have to add about 3 oz. of oil to your new compressor before installation, just like you would an oiled air compressor. It will lock up if you don’t.

When do I need to replace the accumulator in my AC system?

It’s an orifice-tube system, with an accumulator located between the evaporator and compressor on the low pressure side of the system. If you open up your AC system for whatever reason given it’s age you need to replace the accumulator, accum. replacement is supposed to be done whenever you open up the system.

Why does my GMC AC compressor make a rattling sound?

At idle its fine, but when you accelerate the compressor starts locking up and the belt will vibrate so violently that it makes a rattling or rapid clacking sound. Thats right before it breaks the tensioner. Once I replaced my compressor and belt tensioner, all has been fine ever since.

Where can I buy a new AC compressor?

I bought a brand new (NOT remanufactured) AC-Delco compressor from Rockauto for just under $300. I could have saved a few bucks going with a different brand, but the cheap reman units were still over $200, so I figured I would just spend a lil more for an OEM one. I replaced the drier and orifice tube as well.

Ok I have a 2002 Gmc sierra 2500 HD crew cab. Been having some issues with my a/c lately and finally came to the conclusion that I am going to swap out my ac compressor with a new one. My father in law owns a body shop so i have access to a pumping system to remove all the freon in the truck and replace it all when I’m finished.

It’s an orifice-tube system, with an accumulator located between the evaporator and compressor on the low pressure side of the system. If you open up your AC system for whatever reason given it’s age you need to replace the accumulator, accum. replacement is supposed to be done whenever you open up the system.

At idle its fine, but when you accelerate the compressor starts locking up and the belt will vibrate so violently that it makes a rattling or rapid clacking sound. Thats right before it breaks the tensioner. Once I replaced my compressor and belt tensioner, all has been fine ever since.

I bought a brand new (NOT remanufactured) AC-Delco compressor from Rockauto for just under $300. I could have saved a few bucks going with a different brand, but the cheap reman units were still over $200, so I figured I would just spend a lil more for an OEM one. I replaced the drier and orifice tube as well.

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Ruth Doyle