Question about 1995 Chevrolet K1500

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Where are the high side and low side refrigerant ports?

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The high side is always above the low. look for two different lines with fitting caps on them ,they are your high and low ,just remember the high it always above the low side, hope to help you ,thanks robert b.

Posted on Jun 29, 2009

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Where is the low side service port for the air conditioning system?


Look close to the fire-wall in the area under the driver's-side windshield wiper. If you're adding refrigerant with the system from an auto-parts store, the fitting on the hose will not fit the high-side port, only the low-side port. Also, there should be a black plastic cap on the low-side port.
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How and where to add freon to a1995 sedan deville


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2. Attach hoses to manifold> assembly, (hi, lo, and fill).

3. Remove caps from service ports, (Low press. Larger tube from evaporator to accumulator - passenger side over fender well; High Pressure - smaller tube from evaporator along firewall towards driver's side). Verify service> ports are clean.

4. Attach low press. and high press hoses to proper service ports.

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1 Answer

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The newer cars have 2 ports. The large port which is the high side and small port, low side. The kit you buy to refill the air cond will fit only one of the ports and that's the small port. You don't want to hook up on the high side so, this is why ports are sized and the gauge will only fit one. The low side should be near the evaporator or on the evaporator.

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Hi, determine if your car uses R134 or R12 refrigerant. You will notice screw type connectors on the both the High Pressure Side and Low Pressure Side lines in models using R12 refrigerant. R134 compatible models have quick connect valves on both sides. Models made before 1995 may use the old R12 refrigerant. If this is the case, you must have your Chrysler's air conditioning system retrofitted to use R134 refrigerant. Mixing R12 and R134 refrigerants is dangerous and may cause damage to your vehicle. Check your air conditioning system pressure using an automotive air conditioning pressure gauge. Keep in mind that in order to get an accurate reading, the air conditioner has be turned on the coldest setting with maximum blowing power. Remove the Low Pressure Side port valve cap and set it aside. The location of the port varies, but it is usually in front of the engine block. Attach the refill hose to the port on the Low Pressure Side of the air conditioning system. The Low Pressure Side port is smaller the High Pressure Side port. Because the ports are different sizes, the refill kit hose should fit only on the Low Pressure Side port. Additionally, the High Pressure Side port will usually have a red cap or be marked with an H or the word High Allow the air conditioner to **** the refrigerant out of the can by slowly turning the valve on the refill kit hose. Pay attention to the way you hold the can. Most kits will have you hold the can upright when you recharge the air conditioning system. It may take as long as 10 minutes to empty a single can. Turn the valve to the off position and remove the refill hose from the port. Recap the port before closing the hood. Let the air conditioner stay on for at least 30 minutes. This allows the refrigerant to move throughout the entire system.
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1 Answer

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2 Answers

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2 Answers

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1 Answer

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