Question about 2000 Chevrolet Silverado 2500

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How many lbs. of freon for 2000 chevy silverado 2500 5.3ltr.

I just replaced my a/c compressor and need to know how many lbs. of freon to put in the truck. the label on the front is not readable and the dealer couldn't tell me anything. it's a 2000 Chevrolet silverado 2500 with a 5.3ltr. thanks.

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If its a new body style (with the round front - i am assuming because it has a 5.3) then it takes 2.0lbs (.91kg). Make sure you check your fan clutch to see if it spins freely or has some drag to it. the fan clutches usually fail causing the compressors to come apart, the failed ones spin freely.

Posted on Jul 24, 2009

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Actual system charge is 1.8 lbs later models went to 1.6lbs

Posted on Nov 27, 2009

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Check to see if A/C clutch is engaging. If it is not engaging, the compressor is not starting which will prevent the freon from being sucked into the system.

Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

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The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch.

However, if it is empty the leak must be repaired.

The capacity of the ac system will be on a label under the hood, do not overfill. Probably about 2 lbs. Local parts stores (Auto Zone and Advance) will have freon with stop leak. This may help the leak. They also make a freon with a UV dye. I always add a single can with dye so that if stop leak does not work I can find the leak in the future.

The system should be filled until suction pressure is about 36 psi.

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